Engines And Turbines - Latest Activist Disclosures

This table shows recent activist investor (Schedule 13D) filings made in this industry. Any investor or hedge fund that makes an investment with the intention of influencing management is considered an activist investor and must file a 13D.

Date Form Target Company Investor Shares Ownership
(Percent)		 Ownership Change
(Percent)
2025-08-28 13D/A PSIX / Power Solutions International, Inc. Weichai America Corp. 10,716,152 46.50 -2.13
2025-08-25 13D/A PSIX / Power Solutions International, Inc. Weichai America Corp. 10,948,835 47.50 -2.35
2025-08-19 13D/A PSIX / Power Solutions International, Inc. Weichai America Corp. 11,211,841 48.70 -2.20
2025-08-15 13D/A PSIX / Power Solutions International, Inc. Weichai America Corp. 11,463,824 49.80 -2.43
2025-08-07 13D/A PSIX / Power Solutions International, Inc. Winemaster Gary S 1,930,663 8.40 -11.63
2025-04-23 13D/A PSIX / Power Solutions International, Inc. Winemaster Gary S 2,184,790 9.50 -34.16
2025-02-26 13D/A CYD / China Yuchai International Limited Coomber Investments Ltd. 7,537,160 20.10
2023-08-07 13D/A PSIX / Power Solutions International, Inc. Winemaster Gary S 3,318,279 14.50 -6.10
2022-11-16 13D/A CYD / China Yuchai International Limited Shah Capital Management 4,025,793 9.85 23.20
2020-11-12 13D/A PSIX / Power Solutions International, Inc. Winemaster Gary S 3,533,882 15.40 -3.99
2020-09-18 13D/A CYD / China Yuchai International Limited Hong Leong Asia Ltd 17,994,993 44.00 3.09
2020-04-22 13D/A CYD / China Yuchai International Limited Hong Leong Asia Ltd 17,456,061 42.70 2.92
2020-02-13 13D/A CYD / China Yuchai International Limited Goldman Industrial Ltd 7,028,151 17.20
2019-04-26 13D/A PSIX / Power Solutions International, Inc. Weichai America Corp. 11,749,759 51.00 -84.74
2018-12-03 13D/A CYD / China Yuchai International Limited Hong Leong Asia Ltd 16,960,845 41.50 3.67
2018-10-03 13D/A PSIX / Power Solutions International, Inc. Weichai America Corp. 7,700,000 41.30 -90.00
2018-08-31 13D/A PSIX / Power Solutions International, Inc. Weichai America Corp. 7,700,000 41.30 0.00
2018-05-24 13D/A CYD / China Yuchai International Limited Shah Capital Management 3,267,695 8.00 0.81
2017-12-22 13D/A APGI / American Power Group Corporation Spring Mountain Capital, LLC
2017-12-05 13D/A PSIX / Power Solutions International, Inc. Weichai America Corp. 7,700,000 40.70 -73.71
2017-12-05 13D/A PSIX / Power Solutions International, Inc. Winemaster Gary S 3,680,896 19.40 0.00
2017-12-05 13D/A PSIX / Power Solutions International, Inc. Winemaster Kenneth J 2,225,768 11.80 2.07
2017-08-10 13D/A PSIX / Power Solutions International, Inc. Winemaster Gary S 3,680,896 27.00 -5.15
2017-08-10 13D/A PSIX / Power Solutions International, Inc. Weichai America Corp. 2,928,752 21.46 -89.27
2017-06-09 13D/A BWXT / BWX Technologies, Inc. Blue Harbour Group, L.P. 1,992,829 2.01 -62.31
2017-04-07 13D PSIX / Power Solutions International, Inc. Weichai America Corp. 2,728,752 19.99
2017-03-27 13D/A PSIX / Power Solutions International, Inc. Winemaster Gary S 3,880,896 35.53 0.00
2017-03-27 13D/A PSIX / Power Solutions International, Inc. Winemaster Kenneth J 2,180,545 19.97
2017-03-08 13D/A BWXT / BWX Technologies, Inc. Blue Harbour Group, L.P. 5,287,927 5.30 -49.93
2017-03-07 13D/A APGI / American Power Group Corporation Van Steenwyk Matthew 82,182,288 52.60 2.15
2016-09-20 13D/A APGI / American Power Group Corporation Van Steenwyk Matthew 80,455,498 42.40 7.42
2016-09-12 13D/A APGI / American Power Group Corporation Van Steenwyk Matthew 74,895,498 40.70 0.00
2016-09-09 13D/A APGI / American Power Group Corporation Van Steenwyk Matthew 74,895,498 40.70 0.00
2016-09-02 13D/A APGI / American Power Group Corporation Van Steenwyk Matthew 74,895,498 40.80 25.63
2016-07-05 13D/A CYD / China Yuchai International Limited Hong Leong Asia Ltd 16,360,845 40.20 8.64
2016-01-27 13D/A APGI / American Power Group Corporation Spring Mountain Capital, LLC 32,785,233 38.50 3.10
2016-01-14 13D/A APGI / American Power Group Corporation Van Steenwyk Matthew 59,618,146 54.90 104.80
2015-12-17 13D/A CYD / China Yuchai International Limited Shah Capital Management 3,241,499 8.31
2015-11-02 13D/A APGI / American Power Group Corporation Van Steenwyk Matthew 29,110,966 55.10 114.20
2015-11-02 13D/A APGI / American Power Group Corporation Spring Mountain Capital, LLC 31,799,358 60.21 20.37
2015-09-04 13D/A APGI / American Power Group Corporation Spring Mountain Capital, LLC 26,418,811 34.10
2015-09-01 13D/A APGI / American Power Group Corporation Van Steenwyk Matthew 13,590,862 23.00 167.88
2015-08-18 13D/A PSIX / Power Solutions International, Inc. Winemaster Gary S 3,880,896 36.10
2015-07-29 13D/A APGI / American Power Group Corporation Van Steenwyk Matthew 5,073,468 9.80 -60.14
2015-07-21 13D/A APGI / American Power Group Corporation Van Steenwyk Matthew 12,729,302 21.70 150.90
2015-07-16 13D/A CYD / China Yuchai International Limited Hong Leong Asia Ltd 15,059,315 38.30
2015-07-06 13D/A BWXT / BWX Technologies, Inc. Blue Harbour Group, L.P. 10,561,086 9.90
2015-06-12 13D APGI / American Power Group Corporation Van Steenwyk Matthew 5,073,468 9.80
2015-02-02 13D/A BWXT / BWX Technologies, Inc. Blue Harbour Group, L.P. 10,541,502 9.90
2015-01-08 13D/A APGI / American Power Group Corporation Spring Mountain Capital, LLC 24,385,077 32.90