ELBM / Electra Battery Materials Corporation - Pemfailan SEC, Laporan Tahunan, Penyata Proksi

Electra Battery Materials Corporation

Statistik Asas
LEI 5493009ZPOP6FTZAUU15
CIK 1907184
SEC Filings
All companies that sell securities in the United States must register with the Securities and Exchange Commission (SEC) and file reports on a regular basis. These reports include company annual reports (10K, 10Q), news updates (8K), investor presentations (found in 8Ks), insider trades (form 4), ownership reports (13D, and 13G), and reports related to the specific securities sold, such as registration statements and prospectus. This page shows recent SEC filings related to Electra Battery Materials Corporation
SEC Filings (Chronological Order)
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September 3, 2025 EX-99.1

Electra Completes Early Works Program, Accelerating Refinery Construction Restart

EXHIBIT 99.1 Electra Completes Early Works Program, Accelerating Refinery Construction Restart TORONTO, Sept. 03, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today announced the completion of its early works program at its cobalt refinery north of Toronto. This milestone strengthens Electra’s readiness to restart full const

September 3, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2025 Commission File Number: 001-

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H

August 27, 2025 EX-99.1

TSX TRUST COMPANY

Exhibit 99.1 TSX TRUST COMPANY VIA ELECTRONIC TRANSMISSION August 27, 2025 TO ALL APPLICABLE EXCHANGES AND COMMISSIONS: RE: ELECTRA BATTERY MATERIALS CORPORATION Confirmation of Notice of Record and Meeting Dates We are pleased to confirm that Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities. We advise the following with respect to the upcoming Special Meeting

August 27, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number: 001-413

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

August 25, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number: 001-413

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

August 25, 2025 EX-99.5

FORM 51-102F3 MATERIAL CHANGE REPORT

EdgarFiling Exhibit 99.5 FORM 51-102F3 MATERIAL CHANGE REPORT ITEM 1 NAME AND ADDRESS Electra Battery Materials Corporation. (“Electra” or the “Company”) 133 Richmond Street W, Suite 602 Toronto, Ontario M5H 2L3 ITEM 2 DATE OF MATERIAL CHANGES August 21, 2025 and August 22, 2025 ITEM 3 NEWS RELEASES The Company issued news releases on August 21, 2025 and August 25, 2025 relating to the material ch

August 25, 2025 EX-99.1

TRANSACTION SUPPORT AGREEMENT

EdgarFiling Exhibit 99.1 THIS TRANSACTION SUPPORT AGREEMENT IS NOT AN OFFER, SOLICITATION, OR ACCEPTANCE WITH RESPECT TO ANY SECURITIES. ANY SUCH OFFER, SOLICITATION, OR ACCEPTANCE WILL COMPLY WITH ALL APPLICABLE SECURITIES LAWS. Nothing contained in thIS TRANSACTION SUPPORT AGREEMENT shall be an admission of fact or liability OR, UNTIL THE OCCURRENCE OF THE AGREEMENT EFFECTIVE DATE ON THE TERMS D

August 25, 2025 EX-99.2

PROMISSORY NOTE

EdgarFiling Exhibit 99.2 THIS PROMISSORY NOTE HAS NOT BEEN REGISTERED UNDER THE U.S. SECURITIES ACT OF 1933, AS AMENDED (THE “SECURITIES ACT”), OR UNDER THE SECURITIES LAWS OF ANY OTHER JURISDICTION. THIS PROMISSORY NOTE HAS BEEN ACQUIRED FOR INVESTMENT AND MAY NOT BE OFFERED, SOLD, PLEDGED OR OTHERWISE TRANSFERRED UNLESS THIS PROMISSORY NOTE HAS BEEN REGISTERED UNDER THE SECURITIES ACT AND IN ACC

August 25, 2025 EX-99.3

BOARD NOMINATION AGREEMENT

EdgarFiling Exhibit 99.3 BOARD NOMINATION AGREEMENT This Board Nomination Agreement (this “Agreement”) made as of the 22nd day of August, 2025. BETWEEN: ELECTRA BATTERY MATERIALS CORPORATION, a corporation continued under the federal laws of Canada (the “Corporation”) - and - WHITEBOX RELATIVE VALUE PARTNERS, LP, an exempted limited partnership formed under the laws of the Cayman Islands (“WRP”) -

August 25, 2025 EX-99.4

Industry Leader David Stetson Joins Electra Board of Directors

Exhibit 99.4 Industry Leader David Stetson Joins Electra Board of Directors TORONTO, Aug. 25, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce the appointment of David Stetson to its Board of Directors. Mr. Stetson is a seasoned executive with decades of leadership experience in the natural resources secto

August 21, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number: 001-413

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

August 21, 2025 EX-99.1

Electra Launches Debt-to-Equity Conversion and US$30 Million Financing with Lender Support to Advance North America’s First Battery Grade Cobalt Refinery

EXHIBIT 99.1 Electra Launches Debt-to-Equity Conversion and US$30 Million Financing with Lender Support to Advance North America’s First Battery Grade Cobalt Refinery TORONTO, Aug. 21, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) has entered into a term sheet and transaction support agreement with its Lenders pursuant to whi

August 15, 2025 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2025 and 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2025 and 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2025 AND 2024 (expressed in thousands of Canadian dollars) Contents General 3 Company Info

August 15, 2025 EX-99.4

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.4 Form 52-109F2 Certification of Interim Filings Full Certificate I, Marty Rendall, Chief Financial Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of Electra Battery Materials Corporation (the “issuer”) for the interim period ended June 30, 2025. 2. No mis

August 15, 2025 EX-99.1

ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2025 AND 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.1 ` ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2025 AND 2024 (UNAUDITED) (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) NOTICE OF NO AUDITOR REVIEW OF CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS Under National Instrument 51-102, Part 4, subsection 4.3(3)(a), if an auditor has not performed a

August 15, 2025 EX-99.5

Electra Files Second Quarter 2025 Financial Reports

EXHIBIT 99.5 Electra Files Second Quarter 2025 Financial Reports TORONTO, Aug. 15, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today announced the filing of its financial results for the second quarter ended June 30, 2025. During the second quarter of 2025, Electra launched early works activities to prepare for resumption o

August 15, 2025 EX-99.3

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.3 Form 52-109F2 Certification of Interim Filings Full Certificate I, Trent Mell, Chief Executive Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of Electra Battery Materials Corporation (the “issuer”) for the interim period ended June 30, 2025. 2. No misrep

August 15, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number: 001-413

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

August 11, 2025 F-3/A

As filed with the Securities and Exchange Commission on August 11, 2025

As filed with the Securities and Exchange Commission on August 11, 2025 Registration No.

July 31, 2025 EX-99.1

Electra Begins Testing North American Feedstock for Cobalt Refinery

EXHIBIT 99.1 Electra Begins Testing North American Feedstock for Cobalt Refinery TORONTO, July 31, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) announces the start of metallurgical testing on cobalt feedstock from two strategic North American sources: the historic Cobalt Camp in Ontario and home to Electra’s refinery, and th

July 31, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number: 001-41356

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of July 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3 (

July 28, 2025 F-3/A

As filed with the Securities and Exchange Commission on July 28, 2025

As filed with the Securities and Exchange Commission on July 28, 2025 Registration No.

July 28, 2025 EX-15.7

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 15.7 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the inclusion in the Amendment No. 2 to Form 20-F/A of our auditor’s report dated March 28, 2025, except for the subsequent events described in Note 24 and Note 17 as it relates to the share consolidation in 2022, as to which the date is April 23, 2025, relating to the consolidated financial statements of Electra B

July 28, 2025 EX-12.1

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 12.1 CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Trent Mell, certify that: 1. I have reviewed this annual report on Form 20-F/A of Electra Battery Materials Corporation. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumst

July 28, 2025 EX-12.2

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 12.2 CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Marty Rendall, certify that: 1. I have reviewed this annual report on Form 20-F/A of Electra Battery Materials Corporation. 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circu

July 28, 2025 20-F/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20‑F/A (Amendment No. 2)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20‑F/A (Amendment No. 2) (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) O

July 28, 2025 EX-15.8

Consent of Independent Registered Public Accounting Firm

Exhibit 15.8 KPMG LLP Bay Adelaide Centre Suite 4600 333 Bay Street Toronto, ON M5H 2S5 Tel 416-777-8500 Fax 416-777-8818 www.kpmg.ca Consent of Independent Registered Public Accounting Firm The Board of Directors Electra Battery Materials Corporation We consent to the use of our report dated April 4, 2023, on the consolidated financial statements of Electra Battery Materials Corporation (the “Ent

June 27, 2025 F-3

As filed with the Securities and Exchange Commission on June 26, 2025

As filed with the Securities and Exchange Commission on June 26, 2025 Registration No.

June 27, 2025 EX-23.9

CONSENT OF SOUTEX INC.

Exhibit 23.9 CONSENT OF SOUTEX INC. The undersigned hereby consents to (1) the use of the undersigned’s name and the technical and scientific information derived from (a) the Technical Report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 2023, (the “43-101 Technic

June 27, 2025 EX-23.8

CONSENT OF NORDA STELO GÉOLOGIE (formerly Innovexplo Inc.)

Exhibit 23.8 CONSENT OF NORDA STELO GÉOLOGIE (formerly Innovexplo Inc.) The undersigned hereby consents to (1) the use of the undersigned’s name and the technical and scientific information derived from (a) the Technical Report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective Ja

June 27, 2025 EX-1.2

AT THE MARKET OFFERING AGREEMENT

Exhibit 1.2 AT THE MARKET OFFERING AGREEMENT June 26, 2025 H.C. Wainwright & Co., LLC 430 Park Avenue New York, New York 10022 Ladies and Gentlemen: Electra Battery Materials Corporation, a company organized under the laws of Canada (the “Company”), confirms its agreement (this “Agreement”) with H.C. Wainwright & Co., LLC (the “Manager”) as follows: 1. Definitions. The terms that follow, when used

June 27, 2025 EX-23.7

CONSENT OF ERIC KINNAN

Exhibit 23.7 CONSENT OF ERIC KINNAN The undersigned hereby consents to (1) the use of the undersigned’s name and the technical and scientific information derived from (a) the Technical Report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 2023, (the “43-101 Technic

June 27, 2025 EX-4.1

NUMBER GC5883992 Y MATERIALS Y PAID AND NON - ASSESSABLE CONSOLID ATION • SPECIMEN • GC5883992 • CA2 � JS 'ROilf'ORATION • ELECTRA BATTERY � i!ll CONSOLI DATED COMMON SHARES ELEC 83992 • CA28474P7O65 • OFULLY PAID TRA BATTERY MATERIALS CORPORATION• S

Exhibit 4.1 NUMBER GC5883992 Y MATERIALS Y PAID AND NON - ASSESSABLE CONSOLID ATION • SPECIMEN • GC5883992 • CA2 � JS 'ROilf'ORATION • ELECTRA BATTERY � i!ll CONSOLI DATED COMMON SHARES ELEC 83992 • CA28474P7O65 • OFULLY PAID TRA BATTERY MATERIALS CORPORATION• SHARES ELECTRA BATTERY MATERIALS C OFULLY PAID AND NON - ASSESSABLE CON ORPORATION • SPECIMEN• GC5883992 • ISIN:CA28474P7065 CUSIP: 28474P7

June 27, 2025 EX-FILING FEES

Calculation of Filing Fee Tables Form F-3 (Form Type) ELECTRA BATTERY MATERIALS CORPORATION (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities

Exhibit 107 Calculation of Filing Fee Tables Form F-3 (Form Type) ELECTRA BATTERY MATERIALS CORPORATION (Exact Name of Registrant as Specified in its Charter) Table 1: Newly Registered Securities Security Type Security Class Title Fee Calculation Rule or Instruction Amount Registered(1) Proposed Maximum Offering Price Per Unit(1) Maximum Aggregate Offering Price(2) Fee Rate Amount of Registration Fee(3) Fees to Be Paid Unallocated (Universal) Shelf (1) 457(o) (1) (1) $20,000,000(2) 0.

June 24, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number: 001-41356

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3 (

June 24, 2025 EX-99.1

Electra Announces Voting Results from 2025 Annual Meeting of Shareholders

EXHIBIT 99.1 Electra Announces Voting Results from 2025 Annual Meeting of Shareholders TORONTO, June 24, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today announced voting results of its 2025 annual general and special meeting of shareholders held today, June 24, 2025, in Toronto. A total of 5,222,899 common shares in the c

June 24, 2025 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION (the “Company”) REPORT OF VOTING RESULTS

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION (the “Company”) REPORT OF VOTING RESULTS In accordance with Section 11.3 of National Instrument 51-102 – Continuous Disclosure Obligations, the Company hereby advises of the results of the voting on the matters submitted to the annual and special meeting (the “Meeting”) of shareholders of the Company (the “Shareholders”) held on Tuesday, June 24,

June 20, 2025 EX-99.1

Electra Commences Early Works to Support Restart of North America’s Only Cobalt Refinery

EXHIBIT 99.1 Electra Commences Early Works to Support Restart of North America’s Only Cobalt Refinery TORONTO, June 19, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) announces the launch of an early works program at its cobalt refinery north of Toronto, reaffirming the Company’s commitment to onshoring North America’s critica

June 20, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number: 001-41356

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3 (

June 12, 2025 EX-99.1

Electra and Three Fires Group Advance Canada’s First Indigenous-Led Battery Recycling Venture

EXHIBIT 99.1 Electra and Three Fires Group Advance Canada’s First Indigenous-Led Battery Recycling Venture TORONTO, June 12, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra”) and the Three Fires Group today announced significant progress on the Aki Battery Recycling joint venture, the first Indigenous-led lithium-ion battery recycling initiative

June 12, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number: 001-41356

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3 (

June 5, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number: 001-41356

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of June 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3 (

June 5, 2025 EX-99.1

Electra Completes Feasibility Level Study on Battery Recycling Facility

EXHIBIT 99.1 Electra Completes Feasibility Level Study on Battery Recycling Facility TORONTO, June 05, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce completion of a feasibility level Class 3 Engineering Study for the construction of a modular battery recycling facility adjacent to its cobalt sulfate ref

May 21, 2025 EX-99.1

Electra Welcomes Ontario’s $500M Fund to Boost Critical Minerals Processing and Bolster North American Supply Chains

EXHIBIT 99.1 Electra Welcomes Ontario’s $500M Fund to Boost Critical Minerals Processing and Bolster North American Supply Chains TORONTO, May 21, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) commends the Ontario government for its landmark C$500 million Critical Minerals Processing Fund, unveiled in the 2025 provincial budg

May 21, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2025 Commission File Number: 001-41356

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3 (4

May 20, 2025 EX-99.4

ELECTRA BATTERY MATERIALS CORPORATION ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS

Exhibit 99.4 ELECTRA BATTERY MATERIALS CORPORATION ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS Under Canadian securities law, you are entitled to receive certain investor documents. If you wish to receive them, please either complete and return this card by mail (see address below) or you may also go to our website services.tsxtrust.com/financialstatements and input code 0367A. ☐ I would li

May 20, 2025 EX-99.3

Appointment of Proxyholder I/We, being holder(s) of common shares of Electra Battery Materials Corporation (the “ Company ”), hereby appoint : Trent Mell, President and Chief Executive Officer, or, failing him, Marty Rendall, Chief Financial Officer

Exhibit 99.3 Appointment of Proxyholder I/We, being holder(s) of common shares of Electra Battery Materials Corporation (the “ Company ”), hereby appoint : Trent Mell, President and Chief Executive Officer, or, failing him, Marty Rendall, Chief Financial Officer (the “ Management Nominees ”) OR Print the name of the person you are appointing if this person is someone other than the individuals lis

May 20, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2025 Commission File Number: 001-41356

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3 (4

May 20, 2025 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS NOTICE-AND-ACCESS NOTIFICATION

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS NOTICE-AND-ACCESS NOTIFICATION You are receiving this notification because Electra Battery Materials Corporation (the “Company”) has decided to use “notice-and-access” for delivery of proxy solicitation materials to its shareholders for its annual general and special meeting of shareholders (the “

May 20, 2025 EX-99.1

TABLE OF CONTENTS

Exhibit 99.1 Notice of Annual General and Special Meeting of Shareholders Management Information Circular April 30, 2025 April 30, 2025 Dear Shareholder: On behalf of the Board of Directors and Management of Electra Battery Materials Corporation (“Electra” or the “Company”), we would like to invite you to attend the annual general and special meeting of shareholders (the “Meeting”): Date: Tuesday,

May 13, 2025 EX-99.1

ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE MONTHS ENDED MARCH 31, 2025 AND 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.1 ` ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE MONTHS ENDED MARCH 31, 2025 AND 2024 (UNAUDITED) (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) NOTICE OF NO AUDITOR REVIEW OF CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS Under National Instrument 51-102, Part 4, subsection 4.3(3)(a), if an auditor has not performed a review

May 13, 2025 EX-99.4

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.4 Form 52-109F2 Certification of Interim Filings Full Certificate I, Marty Rendall, Chief Financial Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of Electra Battery Materials Corporation (the “issuer”) for the interim period ended March 31, 2025. 2. No mi

May 13, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2025 Commission File Number: 001-41356

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3 (4

May 13, 2025 EX-99.5

Electra Files First Quarter 2025 Financial Reports

EXHIBIT 99.5 Electra Files First Quarter 2025 Financial Reports TORONTO, May 13, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today announced the filing of its first quarter 2025 financial reports. Highlights from the Quarter: Leadership Strengthening – In January, Electra welcomed Marty Rendall as Chief Financial Officer (C

May 13, 2025 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE MONTHS ENDED MARCH 31, 2025 and 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE MONTHS ENDED MARCH 31, 2025 and 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE MONTHS ENDED MARCH 31, 2025 AND 2024 (expressed in thousands of Canadian dollars) Contents General 3 Company Information 3 High

May 13, 2025 EX-99.3

Form 52-109F2 Certification of Interim Filings Full Certificate

Exhibit 99.3 Form 52-109F2 Certification of Interim Filings Full Certificate I, Trent Mell, Chief Executive Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of Electra Battery Materials Corporation (the “issuer”) for the interim period ended March 31, 2025. 2. No misre

May 1, 2025 EX-12.1

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 12.1 CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Trent Mell, certify that: 1. I have reviewed this annual report on Form 20-F/A of Electra Battery Materials Corporation 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumsta

May 1, 2025 EX-13.2

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.2 CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 The undersigned, as the Chief Financial Officer of Electra Battery Materials Corporation certifies that, to the best of his knowledge and belief, the annual report on Form 20-F/A for the fiscal year ended December 31, 2024, which accompanies this certification, fully complies with the requirements of Section 13(a)

May 1, 2025 EX-12.2

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 12.2 CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Marty Rendall, certify that: 1. I have reviewed this annual report on Form 20-F/A of Electra Battery Materials Corporation 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circum

May 1, 2025 EX-15.8

Consent of Independent Registered Public Accounting Firm

Exhibit 15.8 KPMG LLP Bay Adelaide Centre Suite 4600 333 Bay Street Toronto ON M5H 2S5 Tel 416-777-8500 Fax 416-777-8818 www.kpmg.ca Consent of Independent Registered Public Accounting Firm The Board of Directors Electra Battery Materials Corporation We consent to the use of our report dated April 4, 2023, on the consolidated financial statements of Electra Battery Materials Corporation (the “Enti

May 1, 2025 20-F/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F/A (Amendment No. 1)

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F/A (Amendment No. 1) (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) O

May 1, 2025 EX-13.1

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.1 CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 The undersigned, as the Chief Executive Officer of Electra Battery Materials Corporation certifies that, to the best of his knowledge and belief, the annual report on Form 20-F/A for the fiscal year ended December 31, 2024, which accompanies this certification, fully complies with the requirements of Section 13(a)

May 1, 2025 EX-15.7

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 15.7 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the inclusion in the Amendment No. 1 to Form 20-F of our auditor’s report dated March 28, 2025, except for the subsequent events described in Note 24 and Note 17 as it relates to the share consolidation in 2022, as to which the date is April 23, 2025, relating to the consolidated financial statements of Electra Bat

April 24, 2025 EX-15.7

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

Exhibit 15.7 CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM We consent to the inclusion in the Annual Report on Form 20-F of our auditor’s report dated March 28, 2025, except for the subsequent events described in Note 24 and Note 17 as it relates to the share consolidation in 2022, as to which the date is April 23, 2025, relating to the consolidated financial statements of Electra Batte

April 24, 2025 EX-12.2

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 12.2 CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Marty Rendall, certify that: 1. I have reviewed this annual report on Form 20-F of Electra Battery Materials Corporation 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumst

April 24, 2025 EX-13.2

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.2 CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 The undersigned, as the Chief Financial Officer of Electra Battery Materials Corporation certifies that, to the best of his knowledge and belief, the annual report on Form 20-F for the fiscal year ended December 31, 2024, which accompanies this certification, fully complies with the requirements of Section 13(a) o

April 24, 2025 EX-15.8

Consent of Independent Registered Public Accounting Firm

Exhibit 15.8 KPMG LLP Bay Adelaide Centre Suite 4600 333 Bay Street Toronto ON M5H 2S5 Tel 416-777-8500 Fax 416-777-8818 www.kpmg.ca Consent of Independent Registered Public Accounting Firm The Board of Directors Electra Battery Materials Corporation We consent to the use of our report dated April 4, 2023, on the consolidated financial statements of Electra Battery Materials Corporation (the “Enti

April 24, 2025 EX-2.10

LIMITED WAIVER

Exhibit 2.10 LIMITED WAIVER This LIMITED WAIVER is dated as of November 27, 2024, by and among Electra Battery Materials Corporation (the “Company”), the undersigned Guarantors, the undersigned Holders, and GLAS Trust Company, LLC, as Trustee for the Holders. Capitalized terms used herein but not otherwise defined shall have the respective meanings ascribed to such terms in the Indenture, dated as

April 24, 2025 EX-15.12

CONSENT OF ERIC KINNAN

Exhibit 15.12 CONSENT OF ERIC KINNAN The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 2023

April 24, 2025 EX-2.12

EQUITY SUBSCRIPTION AGREEMENT

Exhibit 2.12 EQUITY SUBSCRIPTION AGREEMENT This EQUITY SUBSCRIPTION AGREEMENT (this “Equity Subscription Agreement”) is entered into on November 25, 2024, by and among Electra Battery Materials Corporation (the “Issuer”), a corporation continued under the Canada Business Corporations Act (the “Act”), and the undersigned subscriber (“Subscriber”). WHEREAS, Subscriber desires to subscribe for and pu

April 24, 2025 EX-2.7

SUPPLEMENTAL INDENTURE

Exhibit 2.7 Execution Version (Amended) SUPPLEMENTAL INDENTURE This SUPPLEMENTAL INDENTURE, dated as of November 27, 2024 (this “Supplemental Indenture”), is by and among Electra Battery Materials Corporation (the “Company”), the Guarantors party hereto, and GLAS Trust Company, LLC, as Trustee and Collateral Trustee. Capitalized terms used herein but not otherwise defined shall have the respective

April 24, 2025 EX-15.9

CONSENT OF NORDA STELO INC. (formerly Innovexplo Inc.)

Exhibit 15.9 CONSENT OF NORDA STELO INC. (formerly Innovexplo Inc.) The undersigned hereby consents to (1) the use of the undersigned’s former name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10

April 24, 2025 EX-2.14

ELECTRA BATTERY MATERIALS CORPORATION, THE GUARANTORS PARTY HERETO, GLAS TRUST COMPANY LLC, as Trustee and Collateral Trustee INDENTURE Dated as of November 27, 2024 12.00% Convertible Senior Secured Notes due 2027 TABLE OF CONTENTS

Exhibit 2.14 ELECTRA BATTERY MATERIALS CORPORATION, THE GUARANTORS PARTY HERETO, AND GLAS TRUST COMPANY LLC, as Trustee and Collateral Trustee INDENTURE Dated as of November 27, 2024 12.00% Convertible Senior Secured Notes due 2027 TABLE OF CONTENTS PAGE ARTICLE 1 DEFINITIONS 2 Section 1.01 Definitions 2 Section 1.02 References to Interest 43 Section 1.03 Divisions 43 ARTICLE 2 ISSUE, DESCRIPTION,

April 24, 2025 EX-15.14

CONSENT OF PIERRE ROY

Exhibit 15.14 CONSENT OF PIERRE ROY The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 2023

April 24, 2025 20-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2024 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXC

April 24, 2025 EX-15.13

CONSENT OF SOUTEX INC.

Exhibit 15.13 CONSENT OF SOUTEX INC. The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 2023

April 24, 2025 EX-2.5

- 2 -

Exhibit 2.5 THIS SECOND SUPPLEMENTAL WARRANT INDENTURE is made as of November 27, 2024. BETWEEN: ELECTRA BATTERY MATERIALS CORPORATION a corporation continued under the laws of Canada (hereinafter called the “Corporation”) AND TSX TRUST COMPANY a trust company existing under the laws of Canada (hereinafter called the “Warrant Agent”) RECITALS WHEREAS: A. The Corporation and the Warrant Agent execu

April 24, 2025 EX-11.2

ELECTRA BATTERY MATERIALS CORPORATION INSIDER TRADING POLICY ADOPTED APRIL 8, 2022 (revised October 4, 2022)

Exhibit 11.2 ELECTRA BATTERY MATERIALS CORPORATION INSIDER TRADING POLICY ADOPTED APRIL 8, 2022 (revised October 4, 2022) This insider trading policy (this “Insider Trading Policy”) has been adopted by the board of directors (the “Board”) of Electra Battery Materials Corporation (the “Company”). I. PURPOSE The Company is a publicly traded company and is subject to securities laws in the United Sta

April 24, 2025 EX-1.4

EX-1.4

Exhibit 1.4

April 24, 2025 EX-13.1

CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.1 CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 The undersigned, as the Chief Executive Officer of Electra Battery Materials Corporation certifies that, to the best of his knowledge and belief, the annual report on Form 20-F for the fiscal year ended December 31, 2024, which accompanies this certification, fully complies with the requirements of Section 13(a) o

April 24, 2025 EX-12.1

CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 12.1 CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Trent Mell, certify that: 1. I have reviewed this annual report on Form 20-F of Electra Battery Materials Corporation 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstanc

April 24, 2025 EX-15.3

ELECTRA BATTERY MATERIALS CORPORATION AUDIT COMMITTEE CHARTER Adopted April 8, 2022 (Revised March 28, 2025)

Exhibit 15.3 ELECTRA BATTERY MATERIALS CORPORATION AUDIT COMMITTEE CHARTER Adopted April 8, 2022 (Revised March 28, 2025) I. PURPOSE The purpose of the Audit Committee (the “Committee”) of the Board of Directors (the “Board”) of Electra Battery Materials Corporation (the “Company”) is to oversee the accounting and financial reporting processes of the Company and its subsidiaries and the audits of

April 24, 2025 EX-15.11

CONSENT OF MARC R. BEAUVAIS

Exhibit 15.11 CONSENT OF MARC R. BEAUVAIS The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27,

April 24, 2025 EX-2.13

CONVERTIBLE NOTE SUBSCRIPTION AGREEMENT

Exhibit 2.13 CONVERTIBLE NOTE SUBSCRIPTION AGREEMENT This CONVERTIBLE NOTE SUBSCRIPTION AGREEMENT (this “Convertible Note Subscription Agreement”) is entered into on November 25, 2024, by and among Electra Battery Materials Corporation (the “Issuer”), a corporation continued under the Canada Business Corporations Act (the “Act”), and the undersigned subscriber (“Subscriber”). WHEREAS, Subscriber d

April 24, 2025 EX-2.4

- 2 - ARTICLE 1 INTERPRETATION

Exhibit 2.4 THIS FIRST SUPPLEMENTAL WARRANT INDENTURE is made as of January 12, 2024. BETWEEN: ELECTRA BATTERY MATERIALS CORPORATION a corporation continued under the laws of Canada (hereinafter called the “Corporation”) AND TSX TRUST COMPANY a trust company existing under the laws of Canada (hereinafter called the “Warrant Agent”) RECITALS WHEREAS: A. The Corporation and the Warrant Agent execute

April 24, 2025 EX-15.10

CONSENT OF MARTIN PERRON

Exhibit 15.10 CONSENT OF MARTIN PERRON The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 20

April 24, 2025 EX-2.11

ELECTRA BATTERY MATERIALS CORPORATION - AND - TSX TRUST COMPANY WARRANT INDENTURE November 27, 2024 TABLE OF CONTENTS

Exhibit 2.11 ELECTRA BATTERY MATERIALS CORPORATION - AND - TSX TRUST COMPANY WARRANT INDENTURE November 27, 2024 TABLE OF CONTENTS Article 1 INTERPRETATION 2 1.1 Definitions 2 1.2 Words Importing the Singular 8 1.3 Interpretation not Affected by Headings 8 1.4 Day not a Business Day 8 1.5 Time of the Essence 8 1.6 Governing Law 9 1.7 Meaning of “outstanding” for Certain Purposes 9 1.8 Currency 9 1

April 24, 2025 EX-2.9

LIMITED WAIVER

Exhibit 2.9 LIMITED WAIVER This LIMITED WAIVER is dated as of August 14, 2024, by and among Electra Battery Materials Corporation (the “Company”), the undersigned Guarantors, the undersigned Holders, and GLAS Trust Company, LLC, as Trustee for the Holders. Capitalized terms used herein but not otherwise defined shall have the respective meanings ascribed to such terms in the Indenture, dated as of

April 14, 2025 EX-99.2

FORM 51-102F3 MATERIAL CHANGE REPORT

EXHIBIT 99.2 FORM 51-102F3 MATERIAL CHANGE REPORT ITEM 1 NAME AND ADDRESS Electra Battery Materials Corporation. (the “Company”) 133 Richmond Street W, Suite 602 Toronto, Ontario M5H 2L3 ITEM 2 DATE OF MATERIAL CHANGES April 3, 2025 and April 14, 2025 ITEM 3 NEWS RELEASES The Company issued news releases on April 4, 2025 and April 14, 2025 relating to the material changes, which was disseminated t

April 14, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number: 001-4135

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

April 14, 2025 EX-99.1

Electra Closes Final Tranche of Oversubscribed Private Placement

EXHIBIT 99.1 Electra Closes Final Tranche of Oversubscribed Private Placement TORONTO, April 14, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) announces that it has closed the final tranche of its oversubscribed non-brokered private placement previously announced on March 24, 2025, raising aggregate gross proceeds of approxim

April 4, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number: 001-4135

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

April 4, 2025 EX-99.1

Electra Closes First Tranche of Oversubscribed Private Placement

EXHIBIT 99.1 Electra Closes First Tranche of Oversubscribed Private Placement TORONTO, April 04, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) announces that it has closed the first tranche of its oversubscribed non-brokered private placement previously announced on March 24, 2025, raising aggregate gross proceeds of approxim

April 4, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number: 001-4135

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of April 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

April 4, 2025 EX-99.1

TSX TRUST

Exhibit 99.1 TSX TRUST COMPANY VIA ELECTRONIC TRANSMISSION APRIL 4, 2025 TO ALL APPLICABLE EXHANGES AND COMMISSIONS: RE: ELECTRA BATTERY MATERIALS CORPORATION Confirmation of Notice of Record and Meeting Dates We are pleased to confirm that Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities. We advise the following with respect to the upcoming Annual and Special

March 31, 2025 EX-99.4

Form 52-109F1 Certification of Annual Filings Full Certificate

Exhibit 99.4 Form 52-109F1 Certification of Annual Filings Full Certificate I, Trent Mell, Chief Executive Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the AIF, if any, annual financial statements and annual MD&A, including, for greater certainty, all documents and information that are incorporated by reference in the AIF (together, the “annua

March 31, 2025 EX-99.1

Electra Provides Update on 2024 Activities and Files 2024 Financials

EXHIBIT 99.1 Electra Provides Update on 2024 Activities and Files 2024 Financials TORONTO, March 31, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today confirmed the filing of their consolidated financial statements for the three months and year ended December 31, 2024, on Friday, March 28, 2025, and provides an update on it

March 31, 2025 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE AND TWELVE MONTHS ENDED DECEMBER 31, 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE AND TWELVE MONTHS ENDED DECEMBER 31, 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE AND TWELVE MONTHS ENDED DECEMBER 31, 2024 AND 2023 (expressed in thousands of Canadian dollars) Contents General 3 Company

March 31, 2025 EX-99.3

ELECTRA BATTERY MATERIALS CORPORATION ANNUAL INFORMATION FORM For the fiscal year ended December 31, 2024 Dated March 28, 2025 133 Richmond Street West, Suite 602 Toronto, Ontario, M5H 2L3

Exhibit 99.3 ELECTRA BATTERY MATERIALS CORPORATION ANNUAL INFORMATION FORM For the fiscal year ended December 31, 2024 Dated March 28, 2025 133 Richmond Street West, Suite 602 Toronto, Ontario, M5H 2L3 Contents PRELIMINARY NOTES 1 Date of Information 1 Cautionary Notes to U.S. Investors Concerning Resource Estimates 1 Currency 1 Forward-Looking Information 1 Future-Oriented Financial Information (

March 31, 2025 EX-99.5

Form 52-109F1 Certification of Annual Filings Full Certificate

Exhibit 99.5 Form 52-109F1 Certification of Annual Filings Full Certificate I, Marty Rendall, Chief Financial Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the AIF, if any, annual financial statements and annual MD&A, including, for greater certainty, all documents and information that are incorporated by reference in the AIF (together, the “an

March 31, 2025 EX-99.1

ELECTRA BATTERY MATERIALS CORPORATION CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEARS ENDED DECEMBER 31, 2024 AND 2023 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.1 ELECTRA BATTERY MATERIALS CORPORATION CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEARS ENDED DECEMBER 31, 2024 AND 2023 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) Report of Management’s Accountability The accompanying audited consolidated financial statements of Electra Battery Materials Corporation were prepared by management in accordance with International Financial Reporting Stan

March 31, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-4135

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

March 31, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-4135

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

March 26, 2025 EX-99.1

Electra Confirms Private Placement is Fully Subscribed

EXHIBIT 99.1 Electra Confirms Private Placement is Fully Subscribed TORONTO, March 25, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce that its non-brokered private placement (the “Offering”), on the terms described in the press release of March 24, 2025, is now fully subscribed and allocated. “The strong

March 26, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-4135

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

March 24, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-4135

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

March 24, 2025 EX-99.1

Electra Advances Financing for North America’s Only Cobalt Sulfate Refinery Site visit by MP Marc Serré highlights importance of EV supply chain

EXHIBIT 99.1 Electra Advances Financing for North America’s Only Cobalt Sulfate Refinery Site visit by MP Marc Serré highlights importance of EV supply chain TORONTO, March 24, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to provide an update following a visit from the Honourable Marc G. Serré, Parliamentary Secre

March 24, 2025 EX-99.2

Electra Announces Non-Brokered Private Placement for up to US$3.5 Million

EXHIBIT 99.2 Electra Announces Non-Brokered Private Placement for up to US$3.5 Million TORONTO, March 24, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce that it intends to complete a non-brokered private placement (the “Offering”) to raise aggregate gross proceeds of up to US$3,500,000. The Offering will

March 21, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-4135

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

March 21, 2025 EX-99.1

Electra Announces Federal Government Support for Completion of North America’s Only Cobalt Sulfate Refinery (All amounts in $C unless otherwise specified)

EXHIBIT 99.1 Electra Announces Federal Government Support for Completion of North America’s Only Cobalt Sulfate Refinery (All amounts in $C unless otherwise specified) TORONTO, March 21, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce receipt of a Letter of Intent ("LOI") for proposed funding of $20 milli

March 6, 2025 EX-99.2

FORM 51-102F3 MATERIAL CHANGE REPORT

Exhibit 99.2 FORM 51-102F3 MATERIAL CHANGE REPORT ITEM 1 NAME AND ADDRESS Electra Battery Materials Corporation. (the “Company”) 133 Richmond Street W, Suite 602 Toronto, Ontario M5H 2L3 ITEM 2 DATE OF MATERIAL CHANGE March 5, 2025 ITEM 3 NEWS RELEASE The Company issued a news release on March 6, 2025, relating to the material change, which was disseminated through Business Wire and subsequently f

March 6, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-4135

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of March 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

March 6, 2025 EX-99.1

Electra Provides Corporate Update

EXHIBIT 99.1 Electra Provides Corporate Update TORONTO, March 06, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) announces an agreement with the holders of its senior secured debt that enhances the Company’s financial flexibility. Under this agreement, lenders have agreed to defer all interest payments until February 15, 2027,

February 25, 2025 EX-99.1

Alden Greenhouse Joins Electra Board of Directors

EXHIBIT 99.1 Alden Greenhouse Joins Electra Board of Directors TORONTO, Feb. 25, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce the appointment of Alden Greenhouse to the Company’s Board of Directors. Mr. Greenhouse is currently the Vice-President, Critical & Strategic Minerals for Agnico Eagle Mines Lim

February 25, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2025 Commission File Number: 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2

February 20, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2025 Commission File Number: 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of February 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2

February 20, 2025 EX-99.1

Gold-Rich Cobalt-Copper Mineralization at CAS Property Strengthens Electra’s Idaho Exploration Strategy

EXHIBIT 99.1 Gold-Rich Cobalt-Copper Mineralization at CAS Property Strengthens Electra’s Idaho Exploration Strategy TORONTO, Feb. 20, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to provide an update on its exploration efforts at the CAS Property in the Idaho Cobalt Belt, U.S.A. Recent and historical data from CA

February 14, 2025 EX-99

WHITEBOX ADVISORS LLC

Exhibit A AGREEMENT Each of the undersigned hereby consents and agrees to this joint filing to Schedule 13G for the Common Shares of Electra Battery Materials Corporation.

January 28, 2025 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2025 Commission File Number: 001-41

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of January 2025 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L

January 28, 2025 EX-99.1

Electra Initiates Feasibility Study for Battery Recycling Refinery

EXHIBIT 99.1 Electra Initiates Feasibility Study for Battery Recycling Refinery TORONTO, Jan. 28, 2025 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce the commencement of a feasibility level engineering study to build a battery recycling refinery adjacent to its cobalt refinery north of Toronto. The study will

December 30, 2024 EX-99.1

Electra Confirms Effective Date for Reverse Share Split

EXHIBIT 99.1 Electra Confirms Effective Date for Reverse Share Split TORONTO, Dec. 30, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) announces that effective at the close of business on December 31, 2024, the Company will effect a reverse share split (the “Reverse Split”) of its outstanding common share capital on the basis o

December 30, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2024 Commission File Number: 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2

December 23, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2024 Commission File Number: 001-4

6-K 1 f6k122324.htm FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 T

December 23, 2024 EX-99.1

Electra Announces Marty Rendall as CFO, Succeeding David Allen upon his Retirement

EXHIBIT 99.1 Electra Announces Marty Rendall as CFO, Succeeding David Allen upon his Retirement TORONTO, Dec. 23, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to welcome Marty Rendall, CFA, as its new Chief Financial Officer upon the retirement of David Allen, effective January 1, 2025. Mr. Allen played a key role

December 20, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2024 Commission File Number: 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of December 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2

December 20, 2024 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION (the “Company”) REPORT OF VOTING RESULTS

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION (the “Company”) REPORT OF VOTING RESULTS In accordance with Section 11.3 of National Instrument 51-102 – Continuous Disclosure Obligations, the Company hereby advises of the results of the voting on the matters submitted to the special meeting (the “Meeting”) of shareholders of the Company (the “Shareholders”) held on Friday, December 20, 2024. At

December 20, 2024 EX-99.1

Electra Announces Results of Special Meeting

EXHIBIT 99.1 Electra Announces Results of Special Meeting TORONTO, Dec. 20, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce the results of its special meeting of shareholders held today in Toronto. A total of 13,792,275 common shares in the capital of the Company (“Common Shares”), or 24% of Electra’s iss

November 27, 2024 6-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K/A REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number: 001

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K/A REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, M5H

November 27, 2024 EX-99.2

SUPPLEMENTAL INDENTURE

EX-99.2 3 tm2429669d1ex99-2.htm EXHIBIT 99.2 Exhibit 99.2 Execution Version SUPPLEMENTAL INDENTURE This SUPPLEMENTAL INDENTURE, dated as of November 27, 2024 (this “Supplemental Indenture”), is by and among Electra Battery Materials Corporation (the “Company”), the Guarantors party hereto, and GLAS Trust Company, LLC, as Trustee and Collateral Trustee. Capitalized terms used herein but not otherwi

November 27, 2024 EX-99.3

ELECTRA BATTERY MATERIALS CORPORATION - AND - TSX TRUST COMPANY WARRANT INDENTURE November 27, 2024 TABLE OF CONTENTS

Exhibit 99.3 ExecutionVersion ELECTRA BATTERY MATERIALS CORPORATION - AND - TSX TRUST COMPANY WARRANT INDENTURE November 27, 2024 TABLE OF CONTENTS Article 1 INTERPRETATION 2 1.1 Definitions 2 1.2 Words Importing the Singular 8 1.3 Interpretation not Affected by Headings 8 1.4 Day not a Business Day 9 1.5 Time of the Essence 9 1.6 Governing Law 9 1.7 Meaning of “outstanding” for Certain Purposes 9

November 27, 2024 EX-99.1

ELECTRA BATTERY MATERIALS CORPORATION, THE GUARANTORS PARTY HERETO,

  Exhibit 99.1 Execution Version   ELECTRA BATTERY MATERIALS CORPORATION,   THE GUARANTORS PARTY HERETO,       AND       GLAS TRUST COMPANY LLC,   as Trustee and Collateral Trustee       INDENTURE       Dated as of November 27, 2024       12.00% Convertible Senior Secured Notes due 2027           TABLE OF CONTENTS       PAGE       Article 1 Definitions 2 Section 1.01 Definitions 2 Section 1.02 Ref

November 27, 2024 EX-99.5

LIMITED WAIVER

Exhibit 99.5 Execution Version LIMITED WAIVER This LIMITED WAIVER is dated as of November 27, 2024, by and among Electra Battery Materials Corporation (the “Company”), the undersigned Guarantors, the undersigned Holders, and GLAS Trust Company, LLC, as Trustee for the Holders. Capitalized terms used herein but not otherwise defined shall have the respective meanings ascribed to such terms in the I

November 27, 2024 EX-99.4

– 2 –

Exhibit 99.4 THIS SECOND SUPPLEMENTAL WARRANT INDENTURE is made as of November 27, 2024. BETWEEN: ELECTRA BATTERY MATERIALS CORPORATION a corporation continued under the laws of Canada (hereinafter called the “Corporation”) AND TSX TRUST COMPANY a trust company existing under the laws of Canada (hereinafter called the “Warrant Agent”) RECITALS WHEREAS: A. The Corporation and the Warrant Agent exec

November 26, 2024 EX-99.4

SUPPLEMENTAL INDENTURE

Exhibit 99.4 Execution Version SUPPLEMENTAL INDENTURE This SUPPLEMENTAL INDENTURE, dated as of November 26, 2024 (this “Supplemental Indenture”), is by and among Electra Battery Materials Corporation (the “Company”), the Guarantors party hereto, and GLAS Trust Company, LLC, as Trustee and Collateral Trustee. Capitalized terms used herein but not otherwise defined shall have the respective meanings

November 26, 2024 EX-99.6

– 2 –

Exhibit 99.6 THIS SECOND SUPPLEMENTAL WARRANT INDENTURE is made as of November 26, 2024. BETWEEN: ELECTRA BATTERY MATERIALS CORPORATION a corporation continued under the laws of Canada (hereinafter called the “Corporation”) AND TSX TRUST COMPANY a trust company existing under the laws of Canada (hereinafter called the “Warrant Agent”) RECITALS WHEREAS: A. The Corporation and the Warrant Agent exec

November 26, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number: 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, M5H 2

November 26, 2024 EX-99.8

FORM OF EQUITY SUBSCRIPTION AGREEMENT

Exhibit 99.8 EXECUTION VERSION FORM OF EQUITY SUBSCRIPTION AGREEMENT This EQUITY SUBSCRIPTION AGREEMENT (this “Equity Subscription Agreement”) is entered into on November 25, 2024, by and among Electra Battery Materials Corporation (the “Issuer”), a corporation continued under the Canada Business Corporations Act (the “Act”), and the undersigned subscriber (“Subscriber”). WHEREAS, Subscriber desir

November 26, 2024 EX-99.5

ELECTRA BATTERY MATERIALS CORPORATION - AND - TSX TRUST COMPANY WARRANT INDENTURE November 26, 2024 TABLE OF CONTENTS

Exhibit 99.5 ExecutionVersion ELECTRA BATTERY MATERIALS CORPORATION - AND - TSX TRUST COMPANY WARRANT INDENTURE November 26, 2024 TABLE OF CONTENTS Article 1 INTERPRETATION 2 1.1 Definitions 2 1.2 Words Importing the Singular 8 1.3 Interpretation not Affected by Headings 8 1.4 Day not a Business Day 9 1.5 Time of the Essence 9 1.6 Governing Law 9 1.7 Meaning of “outstanding” for Certain Purposes 9

November 26, 2024 EX-99.9

LIMITED WAIVER

Exhibit 99.9 Execution Version LIMITED WAIVER This LIMITED WAIVER is dated as of November 26, 2024, by and among Electra Battery Materials Corporation (the “Company”), the undersigned Guarantors, the undersigned Holders, and GLAS Trust Company, LLC, as Trustee for the Holders. Capitalized terms used herein but not otherwise defined shall have the respective meanings ascribed to such terms in the I

November 26, 2024 EX-99.3

ELECTRA BATTERY MATERIALS CORPORATION, THE GUARANTORS PARTY HERETO,

  Exhibit 99.3 Execution Version   ELECTRA BATTERY MATERIALS CORPORATION,   THE GUARANTORS PARTY HERETO,       AND       GLAS TRUST COMPANY LLC,   as Trustee and Collateral Trustee       INDENTURE       Dated as of November 26, 2024       12.00% Convertible Senior Secured Notes due 2027           TABLE OF CONTENTS       PAGE       Article 1 Definitions 2 Section 1.01 Definitions 2 Section 1.02 Ref

November 26, 2024 EX-99.7

FORM OF CONVERTIBLE NOTE SUBSCRIPTION AGREEMENT

  Exhibit 99.7   EXECUTION VERSION   FORM OF CONVERTIBLE NOTE SUBSCRIPTION AGREEMENT   This CONVERTIBLE NOTE SUBSCRIPTION AGREEMENT (this “Convertible Note Subscription Agreement”) is entered into on November 25, 2024, by and among Electra Battery Materials Corporation (the “Issuer”), a corporation continued under the Canada Business Corporations Act (the “Act”), and the undersigned subscriber (“S

November 26, 2024 EX-99.1

Electra Completes US$5 Million Financing and Settles Accrued Interest on Convertible Notes

Exhibit 99.1 Electra Completes US$5 Million Financing and Settles Accrued Interest on Convertible Notes Toronto, Ontario – (November 26, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) has closed its previously announced financing transaction (the “Financing”) with the holders of the existing secured notes issued by the Company on February 13,

November 26, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number: 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2

November 26, 2024 EX-99.2

FORM 51-102F3 MATERIAL CHANGE REPORT

Exhibit 99.2 FORM 51-102F3 MATERIAL CHANGE REPORT ITEM 1 NAME AND ADDRESS Electra Battery Materials Corporation. (the “Company”) 133 Richmond Street W, Suite 602 Toronto, Ontario M5H 2L3 ITEM 2 DATE OF MATERIAL CHANGE November 26, 2024 ITEM 3 NEWS RELEASE The Company issued a news release on November 26, 2024 relating to the material change, which was disseminated through Business Wire and subsequ

November 26, 2024 EX-99.1

Electra Completes US$5 Million Financing and Settles Accrued Interest on Convertible Notes

EXHIBIT 99.1 Electra Completes US$5 Million Financing and Settles Accrued Interest on Convertible Notes TORONTO, Nov. 26, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) has closed its previously announced financing transaction (the “Financing”) with the holders of the existing secured notes issued by the Company on February 13

November 19, 2024 EX-99.1

Electra Secures 10-Year Permit to Advance Exploration for Idaho Copper and Cobalt Properties

EXHIBIT 99.1 Electra Secures 10-Year Permit to Advance Exploration for Idaho Copper and Cobalt Properties TORONTO, Nov. 19, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce that it has secured a 10-year exploration permit for its Idaho copper and cobalt properties, including its Iron Creek project, in the

November 19, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number: 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2

November 15, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of November 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5

November 15, 2024 EX-99.1

ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE MONTHS AND NINE MONTHS ENDED SEPTEMBER 30, 2024 AND 2023 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.1 ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE MONTHS AND NINE MONTHS ENDED SEPTEMBER 30, 2024 AND 2023 (UNAUDITED) (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (UNAUDITED) AS AT SEPTEMBER 30, 2024 (expressed in thousands of Can

November 15, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number: 001-4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of November 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2

November 15, 2024 EX-99.1

Electra Files Third Quarter 2024 Financial Reports

EXHIBIT 99.1 Electra Files Third Quarter 2024 Financial Reports TORONTO, Nov. 15, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today announces the filing of their third quarter 2024 financial reports. Achievements in the Quarter Refinery Project U.S. Department of Defence Award: On August 19, 2024, the Company received a US$

November 15, 2024 EX-99.3

FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE

Exhibit 99.3 FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE I, Trent Mell, Chief Executive Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of Electra Battery Materials Corporation (the “issuer”) for the interim period ended September 30, 2024. 2. No m

November 15, 2024 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE AND NINE MONTHS ENDED SEPTEMBER 30, 2024 AND 2023 (expressed in thousands of Canadian dollars) Contents General 3 Company I

November 15, 2024 EX-99.4

FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE

Exhibit 99.4 FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE I, David Allen, Chief Financial Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of Electra Battery Materials Corporation (the “issuer”) for the interim period ended September 30, 2024. 2. No

November 14, 2024 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION SPECIAL MEETING OF SHAREHOLDERS NOTICE-AND-ACCESS NOTIFICATION

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION SPECIAL MEETING OF SHAREHOLDERS NOTICE-AND-ACCESS NOTIFICATION You are receiving this notification because Electra Battery Materials Corporation (the “Company”) has decided to use “notice-and-access” for delivery of proxy solicitation materials to its shareholders for its special meeting of shareholders (the “Meeting”) to be held on Friday, Decemb

November 14, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of November 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5

November 14, 2024 EX-99.4

CERTIFICATE

Exhibit 99.4 CERTIFICATE Reference is made to the Special Meeting of holders of common shares in the capital of Electra Battery Materials Corporation (the "Corporation") scheduled to be held on Friday, December 20, 2024 (the "Meeting"). I, Trent Mell, Chief Executive Officer of the Corporation, hereby certify in my capacity as an officer of the Corporation, for and on behalf of the Corporation, an

November 14, 2024 EX-99.3

Appointment of Proxyholder I/We, being holder(s) of common shares of Electra Battery Materials Corporation (the “ Company ”), hereby appoint : Heather Smiles, Vice - President, Investor Relations & Corporate Development, or, failing her, Stefan Polit

Exhibit 99.3 Appointment of Proxyholder I/We, being holder(s) of common shares of Electra Battery Materials Corporation (the “ Company ”), hereby appoint : Heather Smiles, Vice - President, Investor Relations & Corporate Development, or, failing her, Stefan Politano (the “ Management Nominees ”) OR Print the name of the person you are appointing if this person is someone other than the individuals

November 14, 2024 EX-99.1

TABLE OF CONTENTS

Exhibit 99.1 Notice of Special Meeting of Shareholders Management Information Circular October 31, 2024 October 31, 2024 Dear Shareholder: On behalf of the Board of Directors and Management of Electra Battery Materials Corporation (“Electra” or the “Company”), we would like to invite you to attend the special meeting of shareholders (the “Meeting”): Date: Friday, December 20, 2024 Time: 10:00 a.m.

November 13, 2024 SC 13G/A

ELBM / Electra Battery Materials Corporation / NewGen Asset Management Ltd Passive Investment

SC 13G/A 1 d1097896413g-a.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Electra Battery Materials Corporation (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 28474P201 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the ap

October 28, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2024 Commission File Number: 001-41

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L

October 28, 2024 EX-99.1

TSX TRUST COMPANY

Exhibit 99.1 TSX TRUST COMPANY VIA ELECTRONIC TRANSMISSION October 28, 2024 TO ALL APPLICABLE EXCHANGES AND COMMISSIONS: RE: ELECTRA BATTERY MATERIALS CORPORATION Confirmation of Notice of Record and Meeting Dates We are pleased to confirm that Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities. We advise the following with respect to the upcoming Special Meeting

October 25, 2024 SC 13G/A

ELBM / Electra Battery Materials Corporation / WHITEBOX ADVISORS LLC Passive Investment

SC 13G/A 1 sayw2411140713ga.htm UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 SCHEDULE 13G Under the Securities Exchange Act of 1934 (Amendment No. 2)* Electra Battery Materials Corporation (Name of Issuer) Common Shares, no par value (Title of Class of Securities) 28474P201 (CUSIP Number) September 30, 2024 (Date of Event Which Requires Filing of this Statement) Check the

October 25, 2024 EX-99.1

Electra Announces US$5 Million Financing NOT FOR DISSEMINATION IN THE UNITED STATES OR FOR DISTRIBUTION TO U.S. NEWSWIRE SERVICES

EXHIBIT 99.1 Electra Announces US$5 Million Financing NOT FOR DISSEMINATION IN THE UNITED STATES OR FOR DISTRIBUTION TO U.S. NEWSWIRE SERVICES TORONTO, Oct. 25, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce that it has received a non-binding term sheet from the holders of the existing secured notes issu

October 25, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2024 Commission File Number: 001-41

6-K 1 f6k102524.htm FORM 6-K UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 To

October 8, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2024 Commission File Number: 001-41

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of October 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L

October 8, 2024 EX-99.1

Electra to Participate in OECD Conference

EXHIBIT 99.1 Electra to Participate in OECD Conference TORONTO, Oct. 08, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce CEO Trent Mell will be participating in the 2024 OECD Conference of Mining Regions and Cities taking place October 8 to 11, 2024, in Greater Sudbury, Canada. The OECD (Organisation for

October 1, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of October 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H

October 1, 2024 EX-99.1

Electra Appoints Industry Veteran to Lead Refinery Construction Project

Exhibit 99.1 Electra Appoints Industry Veteran to Lead Refinery Construction Project Toronto, Ontario – (October 1, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce the appointment of Michael Green as its Construction Director. With over 30 years of extensive experience in construction management, Mr. Green will be focuse

September 26, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of September 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M

September 26, 2024 EX-99.1

Electra Commercial Team to Attend LME Week

Exhibit 99.1 Electra Commercial Team to Attend LME Week Toronto, Ontario – (September 26, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce its commercial team, led by Vice President Michael Insulan, will be actively participating in the London Metal Exchange (LME) Week held from September 30th to October 4th, 2024. LME We

September 24, 2024 EX-99.1

Electra Achieves Technical Grade Lithium Carbonate in Recycling Program

EXHIBIT 99.1 Electra Achieves Technical Grade Lithium Carbonate in Recycling Program TORONTO, Sept. 24, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce the successful achievement of greater than 99% purity, or technical grade, lithium carbonate product. These results further bolster the Company’s ability

September 24, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number: 001-

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H

September 18, 2024 EX-99.1

Electra and Three Fires Group Announce Aki Battery Recycling Joint Venture

EXHIBIT 99.1 Electra and Three Fires Group Announce Aki Battery Recycling Joint Venture TORONTO, Sept. 18, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce a joint venture, named Aki Battery Recycling, with Indigenous-owned Three Fires Group to produce battery black mass through responsible recycling of li

September 18, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number: 001-

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H

September 10, 2024 EX-99.1

Electra Announces $20 Million Strategic Investment Proposal (All amounts in US dollars)

EXHIBIT 99.1 Electra Announces $20 Million Strategic Investment Proposal (All amounts in US dollars) TORONTO, Sept. 10, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today provided an update on its financing strategy for North America’s first battery grade cobalt refinery, announcing that it has received a non-binding term sh

September 10, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number: 001-

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of September 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H

August 30, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number: 001-413

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

August 30, 2024 EX-99.1

Electra to Discuss Partnership Opportunities at Indonesian Critical Minerals Summit

EXHIBIT 99.1 Electra to Discuss Partnership Opportunities at Indonesian Critical Minerals Summit TORONTO, Aug. 30, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce its participation in Indonesia’s first critical minerals conference, Fastmarket’s International Critical Minerals and Metals Summit: Indonesia.

August 29, 2024 EX-99.1

Electra Engages Altitude Capital Consultants

EXHIBIT 99.1 Electra Engages Altitude Capital Consultants TORONTO, Aug. 29, 2024 (GLOBE NEWSWIRE) - Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce, in support of its strategic plans to build a North American battery materials supply chain, the Company has signed a strategic advisory agreement with Altitude Capital Consultants I

August 29, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number: 001-413

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of August 2024 Commission File Number: 001-41356 Electra Battery Materials Corporation (Translation of registrant's name into English) 133 Richmond St W, Suite 602 Toronto, Ontario, Canada M5H 2L3

August 19, 2024 EX-99.1

Electra Awarded $20 Million from U.S. Department of Defense Under the Defense Production Act (All amounts in US dollars unless otherwise stated)

Exhibit 99.1 Electra Awarded $20 Million from U.S. Department of Defense Under the Defense Production Act (All amounts in US dollars unless otherwise stated) Toronto, Ontario – (August 19, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”), a processor of low-carbon, ethically-sourced battery materials, announced today that it has been awarded $2

August 19, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of August 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H

August 15, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of August 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H

August 15, 2024 EX-99.1

FORM 51-102F3 MATERIAL CHANGE REPORT

Exhibit 99.1 FORM 51-102F3 MATERIAL CHANGE REPORT ITEM 1 NAME AND ADDRESS Electra Battery Materials Corporation. (the “Company”) 133 Richmond Street W, Suite 602 Toronto, Ontario M5H 2L3 ITEM 2 DATE OF MATERIAL CHANGE August 14, 2024 ITEM 3 NEWS RELEASE The Company issued a news release on August 14, 2024 relating to the material change, which was disseminated through Business Wire and subsequentl

August 15, 2024 EX-99.2

LIMITED WAIVER

Exhibit 99.2   LIMITED WAIVER   This LIMITED WAIVER is dated as of August 14, 2024, by and among Electra Battery Materials Corporation (the “Company”), the undersigned Guarantors, the undersigned Holders, and GLAS Trust Company, LLC, as Trustee for the Holders. Capitalized terms used herein but not otherwise defined shall have the respective meanings ascribed to such terms in the Indenture, dated

August 14, 2024 EX-99.4

FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE

Exhibit 99.4 FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE I, David Allen, Chief Financial Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of Electra Battery Materials Corporation (the “issuer”) for the interim period ended June 30, 2024. 2. No misre

August 14, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of August 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H

August 14, 2024 EX-99.1

ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE MONTHS AND SIX MONTHS ENDED JUNE 30, 2024 AND 2023 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.1 ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE MONTHS AND SIX MONTHS ENDED JUNE 30, 2024 AND 2023 (UNAUDITED) (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) CONDENSEDELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (UNAUDITED) AS AT JUNE 30, 2024 (expressed in thousands of Canad

August 14, 2024 EX-99.3

FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE

Exhibit 99.3 FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE I, Trent Mell, Chief Executive Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of Electra Battery Materials Corporation (the “issuer”) for the interim period ended June 30, 2024. 2. No misrep

August 14, 2024 EX-99.2

Six months ended June 30, 2024

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT ’S DISCUSSION AND ANALYSIS FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE AND SIX MONTHS ENDED JUNE 30, 2024 AND 2023 (expressed in thousands of Canadian dollars) General This Management’s Discussion an

August 14, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of August 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H

August 14, 2024 EX-99.1

Electra Announces Agreement Regarding Outstanding Convertible Notes Interest and Filing of Second Quarter 2024 Financial Reports

Exhibit 99.1 NEWS RELEASE NASDAQ: ELBM TSX.V: ELBM Electra Announces Agreement Regarding Outstanding Convertible Notes Interest and Filing of Second Quarter 2024 Financial Reports Toronto, Ontario – (August 14, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) is pleased to announce that the Company and the holders of US$51 million principal amo

August 13, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of August 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H

August 13, 2024 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION (the “Company”) REPORT OF VOTING RESULTS

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION (the “Company”) REPORT OF VOTING RESULTS In accordance with Section 11.3 of National Instrument 51-102 – Continuous Disclosure Obligations, the Company hereby advises of the results of the voting on the matters submitted to the annual and special meeting (the “Meeting”) of shareholders of the Company (the “Shareholders”) held on Tuesday, August 13

August 13, 2024 EX-99.1

Electra Announces Voting Results of its 2024 Annual Meeting of Shareholders

Exhibit 99.1 NEWS RELEASE NASDAQ: ELBM TSX.V: ELBM Electra Announces Voting Results of its 2024 Annual Meeting of Shareholders Toronto, Ontario – (August 13, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today announced voting results of its 2024 annual general and special meeting of shareholders held today, August 13, in Toronto. A total of

July 25, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of July 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H 2L

July 25, 2024 EX-99.1

Electra Identifies New Copper Showing in Idaho and Extends Redcastle Agreement

Exhibit 99.1 NEWS RELEASE NASDAQ: ELBM TSX.V: ELBM Electra Identifies New Copper Showing in Idaho and Extends Redcastle Agreement Toronto, Ontario – (July 25, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) announces a new copper showing in proximity to its Iron Creek Project, and provides an update on its Idaho exploration activities. Highlig

July 11, 2024 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS NOTICE-AND-ACCESS NOTIFICATION

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS NOTICE-AND-ACCESS NOTIFICATION You are receiving this notification because Electra Battery Materials Corporation (the “Company”) has decided to use “notice-and-access” for delivery of proxy solicitation materials to its shareholders for its annual general and special meeting of shareholders (the “

July 11, 2024 EX-99.1

TABLE OF CONTENTS

Exhibit 99.1 Notice of Annual General and Special Meeting of Shareholders Management Information Circular June 24, 2024 June 24, 2024 Dear Shareholder: On behalf of the Board of Directors and Management of Electra Battery Materials Corporation (“Electra” or the “Company”), we would like to invite you to attend the annual general and special meeting of shareholders (the “Meeting”): Date: Tuesday, A

July 11, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of July 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H 2L

July 11, 2024 EX-99.3

Appointment of Proxyholder I/We, being holder(s) of common shares of Electra Battery Materials Corporation (the “ Company ”), hereby appoint : Trent Mell, President and Chief Executive Officer, or, failing him, David Allen, Chief Financial Officer (t

Exhibit 99.3 Appointment of Proxyholder I/We, being holder(s) of common shares of Electra Battery Materials Corporation (the “ Company ”), hereby appoint : Trent Mell, President and Chief Executive Officer, or, failing him, David Allen, Chief Financial Officer (the “ Management Nominees ”) OR Print the name of the person you are appointing if this person is someone other than the individuals liste

July 11, 2024 EX-99.4

ELECTRA BATTERY MATERIALS CORPORATION ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS

Exhibit 99.4 ELECTRA BATTERY MATERIALS CORPORATION ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS Under Canadian securities law, you are entitled to receive certain investor documents. If you wish to receive them, please either complete and return this card by mail (see address below) or you may also go to our website services.tsxtrust.com/financialstatements and input code 0367A. ☐ I would li

June 10, 2024 EX-99.1

Electra Awarded $5 Million from Government of Canada to Advance Development of Proprietary Battery Metals Recycling Technology (All amounts in CAD dollars unless otherwise stated)

Exhibit 99.1 NEWS RELEASE NASDAQ: ELBM TSX.V: ELBM Electra Awarded $5 Million from Government of Canada to Advance Development of Proprietary Battery Metals Recycling Technology (All amounts in CAD dollars unless otherwise stated) Toronto, Ontario – (June 10, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today announced that it has received

June 10, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of June 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H 2L

May 31, 2024 EX-99.1

TSX TRUST COMPANY

Exhibit 99.1 TSX TRUST COMPANY VIA ELECTRONIC TRANSMISSION May 30, 2024 TO ALL APPLICABLE EXCHANGES AND COMMISSIONS: RE: ELECTRA BATTERY MATERIALS CORPORATION Confirmation of Notice of Record and Meeting Dates We are pleased to confirm that Notice of Record and Meeting Dates was sent to The Canadian Depository for Securities. We advise the following with respect to the upcoming Annual and Special

May 31, 2024 6-K/A

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K/A (Amendment No. 1) Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K/A (Amendment No. 1) Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of May 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ont

May 30, 2024 EX-99.1

ELECTRA BATTERY MATERIALS CORPORATION ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS NOTICE-AND-ACCESS NOTIFICATION

Exhibit 99.1 ELECTRA BATTERY MATERIALS CORPORATION ANNUAL GENERAL AND SPECIAL MEETING OF SHAREHOLDERS NOTICE-AND-ACCESS NOTIFICATION You are receiving this notification because Electra Battery Materials Corporation (the “Company”) has decided to use “notice-and-access” for delivery of proxy solicitation materials to its shareholders for its annual general and special meeting of shareholders (the “

May 30, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of May 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H 2L3

May 23, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number: 001-41356

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16 UNDER THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number: 001-41356 ELECTRA BATTERY MATERIALS CORP. (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H 2L3 (

May 23, 2024 EX-99.6

Electra Files First Quarter 2024 Financial Reports

Exhibit 99.6 NEWS RELEASE NASDAQ: ELBM TSX.V: ELBM Electra Files First Quarter 2024 Financial Reports Toronto, Ontario – (May 22, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today announces the filing of their first quarter 2024 financial reports. “Over the course of the quarter we have remained committed to pursuing non-dilutive opportuni

May 23, 2024 EX-99.1

ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE MONTHS ENDED MARCH 31, 2024 AND 2023 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.1 ELECTRA BATTERY MATERIALS CORPORATION CONDENSED INTERIM CONSOLIDATED FINANCIAL STATEMENTS FOR THE THREE MONTHS ENDED MARCH 31, 2024 AND 2023 (UNAUDITED) (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) ELECTRA BATTERY MATERIALS CORPORATION CONSOLIDATED STATEMENTS OF FINANCIAL POSITION (UNAUDITED) AS AT MARCH 31, 2024 AND 2023 (expressed in thousands of Canadian dollars) March 31, 2024 Dec

May 23, 2024 EX-99.5

ELECTRA BATTERY MATERIALS CORPORATION Form 51-102F6 Statement of Executive Compensation

Exhibit 99.5 ELECTRA BATTERY MATERIALS CORPORATION Form 51-102F6 Statement of Executive Compensation The following information, dated as of May 21, 2024, sets out the statement of executive compensation of Electra Battery Materials Corporation (“Electra” or the “Company”) for the financial year ended December 31, 2023, prepared in accordance with Form 51-102F6 – Statement of Executive Compensation

May 23, 2024 EX-99.4

FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE

Exhibit 99.4 FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE I, David Allen, Chief Financial Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of Electra Battery Materials Corporation (the “issuer”) for the interim period ended March 31, 2024. 2. No misr

May 23, 2024 EX-99.3

FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE

Exhibit 99.3 FORM 52-109F2 CERTIFICATION OF INTERIM FILINGS FULL CERTIFICATE I, Trent Mell, Chief Executive Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the interim financial report and interim MD&A (together, the “interim filings”) of Electra Battery Materials Corporation (the “issuer”) for the interim period ended March 31, 2024. 2. No misre

May 23, 2024 EX-99.2

Three months ended March 31, 2024 ($)

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE MONTHS ENDED MARCH 31, 2024 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE THREE MONTHS ENDED MARCH 31, 2024 AND 2023 (expressed in thousands of Canadian dollars) General This Management’s Discussion and Analysis (“MD

May 16, 2024 EX-11.1

ELECTRA BATTERY MATERIALS CORPORATION CODE OF BUSINESS CONDUCT AND ETHICS Adopted April 8, 2022

Exhibit 11.1 ELECTRA BATTERY MATERIALS CORPORATION CODE OF BUSINESS CONDUCT AND ETHICS Adopted April 8, 2022 I. PURPOSE The interests of Electra Battery Materials Corporation (the “Company”) are best served when its employees, officers and directors adhere to the highest standards of business ethics. The Company has created, and the board of directors (the “Board”) of the Company has adopted, this

May 16, 2024 EX-15.4

ELECTRA BATTERY MATERIALS CORPORATION COMPENSATION, GOVERNANCE, AND NOMINATING COMMITTEE CHARTER Adopted April 8, 2022 (Revised: March 28, 2023)

Exhibit 15.4 ELECTRA BATTERY MATERIALS CORPORATION COMPENSATION, GOVERNANCE, AND NOMINATING COMMITTEE CHARTER Adopted April 8, 2022 (Revised: March 28, 2023) This Compensation, Governance, and Nominating Committee Charter (this “Charter”) has been adopted by the Board of Directors (the “Board”) of Electra Battery Materials Corporation (the “Company”) and sets forth the purpose, composition, author

May 16, 2024 EX-15.10

CONSENT OF MARTIN PERRON

Exhibit 15.10 CONSENT OF MARTIN PERRON The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 20

May 16, 2024 EX-12.1

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 12.1 CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, Trent Mell, certify that: 1. I have reviewed this annual report on Form 20-F of Electra Battery Materials Corporation 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstanc

May 16, 2024 EX-15.13

CONSENT OF SOUTEX INC.

Exhibit 15.13 CONSENT OF SOUTEX INC. The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 2023

May 16, 2024 EX-1.3

Certificate of Amendment Canada Business Corporations Act

Exhibit 1.3 Certificate of Amendment Canada Business Corporations Act Certificat de modification Loi canadienne sur les sociétés par actions Electra Battery Materials Corporation Corporate name / Dénomination sociale 1095406-3 Corporation number / Numéro de société I HEREBY CERTIFY that the articles of the above-named corporation are amended under section 178 of the Canada Business Corporations Ac

May 16, 2024 EX-15.11

CONSENT OF MARC R. BEAUVAIS

Exhibit 15.11 CONSENT OF MARC R. BEAUVAIS The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27,

May 16, 2024 EX-97.1

ELECTRA BATTERY MATERIALS CORPORATION DODD-FRANK CLAWBACK POLICY

Exhibit 97.1 ELECTRA BATTERY MATERIALS CORPORATION DODD-FRANK CLAWBACK POLICY Upon the recommendation of the Compensation, Governance, and Nominating Committee (the “CG&N Committee”) of the Board of Directors (the “Board”) of Electra Battery Materials Corporation (the “Company”), the Board has adopted the following Dodd-Frank Clawback Policy (this “Policy”) on November 8, 2023, effective as of Oct

May 16, 2024 EX-15.12

CONSENT OF ERIC KINNAN

Exhibit 15.12 CONSENT OF ERIC KINNAN The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 2023

May 16, 2024 EX-15.7

Consent of Independent Auditor

Exhibit 15.7 Consent of Independent Auditor We consent to the incorporation by reference in the Registration Statement on Form S-8 (File No. 333-264589) of our auditor’s report dated May 15, 2024 with respect to the consolidated financial statements of Electra Battery Materials Corporation as at December 31, 2023 and for the year then ended, as included in the Annual Report on Form 20-F for the ye

May 16, 2024 EX-15.8

Consent of Independent Registered Public Accounting Firm

Exhibit 15.8 KPMG LLP Bay Adelaide Centre Suite 4600 333 Bay Street Toronto ON M5H 2S5 Tel 416-777-8500 Fax 416-777-8818 www.kpmg.ca Consent of Independent Registered Public Accounting Firm The Board of Directors Electra Battery Materials Corporation We consent to the use of our report dated April 4, 2023 on the consolidated financial statements of Electra Battery Materials Corporation (the “Entit

May 16, 2024 EX-15.5

S-K 1300 Technical Report Summary and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA

Exhibit 15.5 Val-d’Or Head Office 560, 3e Avenue Val-d’Or (Québec) J9P 1S4 Québec Office Montréal Office Téléphone : 819-874-0447 725, boulevard Lebourgneuf 859, boulevard Jean-Paul-Vincent Sans frais : 866-749-8140 Suite #310-12 Suite 201 Courriel: [email protected] Québec (Québec) G2J 0C4 Longueuil (Québec) J4G 1R3 Site Web: www.innovexplo.com S-K 1300 Technical Report Summary and Mineral Reso

May 16, 2024 EX-15.15

KPMG LLP

Exhibit 15.15 KPMG LLP Bay Adelaide Centre Suite 4600 333 Bay Street Toronto ON M5H 2S5 Tel 416-777-8500 Fax 416-777-8818 www.kpmg.ca May 15, 2024 Securities and Exchange Commission Washington, D.C. 20549 Ladies and Gentlemen: We were previously principal accountants for Electra Battery Materials Corporation (the “Company”), and, under the date of April 4, 2023, we reported on the consolidated fin

May 16, 2024 EX-1.1

/es societes par actions

Exhibit 1.1 /es societes par actions Certificate of Continuance Canada Business Corporations Act Certificat de prorogation Loi canadienne sur les sociétés par actions First Cobalt Corp. Corporate name / Dénomination sociale 1095406-3 Corporation number / Numéro de société I HEREBY CERTIFY that the above-named corporation, the articles of continuance of which are attached, is continued under sectio

May 16, 2024 EX-12.2

PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 12.2 CERTIFICATION PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002 I, David Allen, certify that: 1. I have reviewed this annual report on Form 20-F of Electra Battery Materials Corporation 2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstan

May 16, 2024 EX-13.1

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.1 CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 The undersigned, as the Chief Executive Officer of Electra Battery Materials Corporation certifies that, to the best of his knowledge and belief, the annual report on Form 20-F for the fiscal year ended December 31, 2023, which accompanies this certification, fully complies with the requirements of Section 13(a) o

May 16, 2024 EX-15.9

CONSENT OF INNOVEXPLO INC.

Exhibit 15.9 CONSENT OF INNOVEXPLO INC. The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 2

May 16, 2024 EX-2.1

DESCRIPTION OF SECURITIES

Exhibit 2.1 DESCRIPTION OF SECURITIES The Company’s authorized share capital consists of an unlimited number of Common Shares Common Shares The Common Shares have all of the rights, privileges, restrictions and conditions of other Common Shares of the Corporation. Holders of Common Shares are entitled to receive notice of any meeting of shareholders of the Corporation, to attend and to cast one vo

May 16, 2024 20-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year endedDecember 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF T

May 16, 2024 EX-15.3

ELECTRA BATTERY MATERIALS CORPORATION AUDIT COMMITTEE CHARTER Adopted April 8, 2022

Exhibit 15.3 ELECTRA BATTERY MATERIALS CORPORATION AUDIT COMMITTEE CHARTER Adopted April 8, 2022 I. PURPOSE The purpose of the Audit Committee (the “Committee”) of the Board of Directors (the “Board”) of Electra Battery Materials Corporation (the “Company”) is to oversee the accounting and financial reporting processes of the Company and its subsidiaries and the audits of the financial statements

May 16, 2024 EX-13.2

PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

Exhibit 13.2 CERTIFICATION PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 The undersigned, as the Chief Executive Officer of Electra Battery Materials Corporation certifies that, to the best of his knowledge and belief, the annual report on Form 20-F for the fiscal year ended December 31, 2023, which accompanies this certification, fully complies with the requirements of Section 13(a) o

May 16, 2024 EX-15.14

CONSENT OF PIERRE ROY

Exhibit 15.14 CONSENT OF PIERRE ROY The undersigned hereby consents to (1) the use of the undersigned’s name in connection with, and the technical and scientific information derived from, (a) the technical report titled “NI 43-101 Technical Report and Mineral Resource Estimate for the Iron Creek Cobalt-Copper Property, Lemhi County, Idaho, USA” dated March 10, 2023, and effective January 27, 2023

May 14, 2024 EX-99.4

Form 52-109F1 Certification of Annual Filings Full Certificate

Exhibit 99.4 Form 52-109F1 Certification of Annual Filings Full Certificate I, Trent Mell, Chief Executive Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the AIF, if any, annual financial statements and annual MD&A, including, for greater certainty, all documents and information that are incorporated by reference in the AIF (together, the “annua

May 14, 2024 EX-99.3

ELECTRA BATTERY MATERIALS CORPORATION ANNUAL INFORMATION FORM For the fiscal year ended December 31, 2023 Dated May 10, 2024 133 Richmond Street West, Suite 602 Toronto, Ontario, M5H 2L3

Exhibit 99.3 ELECTRA BATTERY MATERIALS CORPORATION ANNUAL INFORMATION FORM For the fiscal year ended December 31, 2023 Dated May 10, 2024 133 Richmond Street West, Suite 602 Toronto, Ontario, M5H 2L3 Table of Contents TABLE OF CONTENTS PRELIMINARY NOTES 1 Date of Information 1 Cautionary Notes to U.S. Investors Concerning Resource Estimates 1 Currency 1 Forward-Looking Information 1 Future-Oriente

May 14, 2024 EX-99.2

ELECTRA BATTERY MATERIALS CORPORATION (FORMERLY FIRST COBALT CORP.) MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE YEAR ENDED DECEMBER 31, 2023 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.2 ELECTRA BATTERY MATERIALS CORPORATION (FORMERLY FIRST COBALT CORP.) MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE YEAR ENDED DECEMBER 31, 2023 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) ELECTRA BATTERY MATERIALS CORPORATION MANAGEMENT’S DISCUSSION AND ANALYSIS FOR THE YEAR ENDED DECEMBER 31, 2023 (expressed in thousands of Canadian dollars) GENERAL This Management’s Discussion and An

May 14, 2024 EX-99.5

Form 52-109F1 Certification of Annual Filings Full Certificate

Exhibit 99.5 Form 52-109F1 Certification of Annual Filings Full Certificate I, David Allen, Chief Financial Officer of Electra Battery Materials Corporation, certify the following: 1. Review: I have reviewed the AIF, if any, annual financial statements and annual MD&A, including, for greater certainty, all documents and information that are incorporated by reference in the AIF (together, the “annu

May 14, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13A-16 OR 15D-16 OF THE SECURITIES EXCHANGE ACT OF 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13A-16 OR 15D-16 OF THE SECURITIES EXCHANGE ACT OF 1934 For the month of May 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H 2L3

May 14, 2024 EX-99.1

ELECTRA BATTERY MATERIALS CORPORATION (FORMERLY FIRST COBALT CORP.) CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEARS ENDED DECEMBER 31, 2023 AND 2022 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS)

Exhibit 99.1 ELECTRA BATTERY MATERIALS CORPORATION (FORMERLY FIRST COBALT CORP.) CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEARS ENDED DECEMBER 31, 2023 AND 2022 (EXPRESSED IN THOUSANDS OF CANADIAN DOLLARS) ELECTRA BATTERY MATERIALS CORPORATION CONSOLIDATED FINANCIAL STATEMENTS FOR THE YEARS ENDED DECEMBER 31, 2023 AND 2022 (expressed in thousands of Canadian dollars) Report of Management’s Accoun

May 14, 2024 EX-99.6

Electra Provides Refinery Update and Files 2023 Financial Reports

Exhibit 99.6 NEWS RELEASE NASDAQ: ELBM TSX.V: ELBM Electra Provides Refinery Update and Files 2023 Financial Reports Toronto, Ontario – (May 13, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) today provided an update on its Refinery project and announced the filing of their full year 2023 financial reports. Electra continues to move ahead wit

May 1, 2024 NT 20-F

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 12b-25 NOTIFICATION OF LATE FILING

SEC File Number: 000-41356 CUSIP Number: 28474P201 UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.

April 2, 2024 EX-99.1

Electra and Eurasian Resources Group Sign Cobalt Supply Agreement

Exhibit 99.1 NEWS RELEASE NASDAQ: ELBM TSX.V: ELBM Electra and Eurasian Resources Group Sign Cobalt Supply Agreement Toronto, Ontario – (April 2, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra”, “Company”) and Eurasian Resources Group S.A.R.L. (“ERG”), a leading diversified natural resources group headquartered in Luxembourg, announced today that they have sign

April 2, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of April 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H 2

March 21, 2024 EX-99.1

Electra Receives Extension from NASDAQ to Resolve Minimum Price Requirement

Exhibit 99.1 NEWS RELEASE NASDAQ: ELBM TSX.V: ELBM Electra Receives Extension from NASDAQ to Resolve Minimum Price Requirement Toronto, Ontario – (March 21, 2024) – Electra Battery Materials Corporation (NASDAQ: ELBM; TSX-V: ELBM) (“Electra” or the “Company”) announced today it has received an additional 180-days notice (the “Extension”) from The Nasdaq Stock Market LLC (“Nasdaq”) to regain compli

March 21, 2024 6-K

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 6-K Report of Foreign Private Issuer Pursuant to Rule 13a-16 or 15d-16 of the Securities Exchange Act of 1934 For the month of March 2024 Commission File Number 001-41356 Electra Battery Materials Corporation (Translation of registrant’s name into English) 133 Richmond Street West, Suite 602 Toronto, Ontario, Canada M5H 2

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