SCHEDULE: Weichai America Reduces Stake in Power Solutions International

Weichai America, a subsidiary of Weichai Power and SHIG, sold 232,683 shares of Power Solutions International common stock, reducing its beneficial ownership to 46.5%.

Summary

• Weichai America Corp., a subsidiary of Weichai Power Co., Ltd., which is controlled by Shandong Heavy Industry Group Co., Ltd. (collectively, the "Reporting Persons"), sold an aggregate of 232,683 shares of Power Solutions International, Inc. common stock.
• The sales occurred in a series of open-market transactions between August 22, 2025, and August 26, 2025, pursuant to Rule 144 under the Securities Act of 1933.
• This transaction resulted in a decrease of over one percent (1%) in the Reporting Persons' aggregate beneficial ownership percentage.
• Following these sales, the Reporting Persons collectively beneficially own 10,716,152 shares, which represents 46.5% of Power Solutions International's outstanding common stock.
• The shares were sold at weighted average prices ranging from $83.2797 to $91.0031 per share across the transaction dates.

Sentiment

Score: 4

Explanation: The sale of a significant block of shares by a major strategic investor, reducing its stake by over 1%, is generally viewed as a negative signal for the company's stock, indicating a potential decrease in commitment or a strategic re-evaluation by the selling entity. While the sale was conducted under Rule 144, the market often interprets such actions as a lack of strong conviction.

Negatives

• A significant shareholder, Weichai America, reduced its stake in Power Solutions International by selling 232,683 shares.
• The reduction in ownership by over 1% could be interpreted by the market as a decrease in confidence or a strategic shift by the major investor group.

Risks

• Reduced commitment from a major strategic investor (Weichai America/Power/SHIG) could impact future strategic alignment or support for Power Solutions International.
• The sale of a large block of shares by a significant shareholder could put downward pressure on the company's stock price.

Future Outlook

NA

Industry Context

This filing primarily concerns a change in beneficial ownership by a major investor and does not provide specific details on broader industry trends or competitive landscape. However, the sale of shares by a significant strategic partner like Weichai could be interpreted by the market in the context of the heavy equipment and engine manufacturing industry, potentially signaling a re-evaluation of strategic priorities or market conditions by the selling entity.

Stakeholder Impact

• Shareholders may experience negative sentiment and potential downward pressure on share price due to a major investor reducing its stake.
• Management may need to address market concerns regarding the reduced stake of a significant strategic partner.

Next Steps

• The Reporting Persons undertake to provide full information regarding the number of shares sold at each separate price for each transaction upon request by the SEC staff, the Issuer, or a security holder.

Key Dates

Recommendation

While a major shareholder reducing its stake can be a negative signal, the remaining 46.5% ownership by Weichai America, Weichai Power, and SHIG still represents a substantial strategic interest. The sale was conducted under Rule 144, suggesting a planned, orderly disposition rather than a distressed exit. Investors should monitor future actions by these key shareholders and the company's operational performance, but an immediate 'sell' recommendation might be premature given the continued significant stake. A 'hold' allows for observation of market reaction and any further strategic developments.

Keywords

Power Solutions International, Weichai America, Weichai Power, Shandong Heavy Industry Group, SHIG, Schedule 13D/A, beneficial ownership, stock sale, Rule 144, common stock, equity stake