SCHEDULE 13D/A

Power Solutions International Inc

Common Stock, par value $0.001 per share · CUSIP: 73933G202

Event date: 2025-08-26

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Weichai America Corp.Reported CIK 0001702521

  Shares: 10,716,152.00 · Class: 46.5%

• Weichai Power Co., Ltd.

  Shares: 10,716,152.00 · Class: 46.5%

• Shandong Heavy Industry Group Co., Ltd.

  Shares: 10,716,152.00 · Class: 46.5%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.