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Power Solutions International (PSIX) sees Weichai entities sell 15,802 shares

Filing Impact
(Very High)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

Weichai America Corp., together with Weichai Power Co., Ltd. and Shandong Heavy Industry Group Co., Ltd., reported selling a total of 15,802 shares of POWER SOLUTIONS INTERNATIONAL common stock on 20 Aug 2025 in broker-dealer trades conducted under Rule 144 at prices around $80–$81 per share.

The common stock is held indirectly through these Weichai-affiliated entities, which now report post-transaction indirect holdings of 10,991,149 POWER SOLUTIONS INTERNATIONAL common shares, with no individual having beneficial ownership over these shares.

Positive

  • None.

Negative

  • None.

Insights

TL;DR: Joint insiders completed Rule 144 sales of ~15.8k shares, a routine liquidity event with limited disclosed market impact.

The Form 4 discloses broker-dealer sales executed under Rule 144 on 08/20/2025. The sizes reported (15,797 and 5 shares) and the use of a weighted-average price indicate multiple transactions rather than a single block sale. The filing provides exact post-transaction beneficial ownership counts but does not disclose total outstanding shares or percentage ownership, so market impact cannot be quantified from this form alone. Disclosure and joint filing are procedurally appropriate.

TL;DR: The joint filing and signatures show proper disclosure governance; transactions are documented with required explanations.

The report is signed by authorized representatives and cites Exhibits 24.1 and 24.2 for powers of attorney, demonstrating formal authority to file. The Explanation of Responses states the sales were conducted pursuant to Rule 144 and clarifies voting/disposal arrangements among the Reporting Persons. The disclosure meets Form 4 requirements but does not provide context on motives or any change in control.

Insider Weichai America Corp., Weichai Power Co., Ltd., Shandong Heavy Industry Group Co., Ltd.
Role 10% Owner | 10% Owner | 10% Owner
Sold 15,802 shs ($1.27M)
Type Security Shares Price Value
Sale Common Stock 15,797 $80.4969 $1.27M
Sale Common Stock 5 $81.00 $405.00
Holdings After Transaction: Common Stock — 10,991,149 shares (Indirect, See Explanation of Responses)
Footnotes (3)
  1. F1. These transactions occurred pursuant to broker-dealer sales conducted in accordance with Rule 144 under the Securities Act of 1933, as amended.
  2. F2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $80.00 to $80.99, inclusive. The Reporting Persons (as defined below) undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.
  3. F3. This report is filed jointly by Weichai America Corp., Weichai Power Co., Ltd. and Shandong Heavy Industry Group Co., Ltd. (collectively, the "Reporting Persons"). Weichai America Corp. is the direct owner of the Common Stock referenced in this report and shares the power to vote and the power to dispose of all of such shares of Common Stock with the other Reporting Persons. No individual has beneficial ownership over the Common Stock beneficially owned by the Reporting Persons.
Shares sold (total) 15,802 shares Total PSIX common stock sold on 2025-08-20 by Weichai-affiliated reporting entities
Primary block sold 15,797 shares Larger sale of PSIX common stock on 2025-08-20
Weighted average sale price $80.4969 per share Weighted average price for the 15,797-share sale conducted under Rule 144
Additional sale price $81.0000 per share Price for a separate 5-share PSIX sale on 2025-08-20
Trade price range $80.00–$80.99 Range of individual transaction prices within the weighted-average sale block
Post-transaction holdings 10,991,149 shares Indirect PSIX common stock holdings reported after the August 20, 2025 sales
Rule 144 regulatory
"transactions occurred pursuant to broker-dealer sales conducted in accordance with Rule 144"
Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.
weighted average price financial
"The price reported in Column 4 is a weighted average price."
Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.
beneficial ownership regulatory
"No individual has beneficial ownership over the Common Stock beneficially owned by the Reporting Persons."
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
broker-dealer regulatory
"These transactions occurred pursuant to broker-dealer sales conducted in accordance with Rule 144."
A broker-dealer is a licensed firm or individual that both executes trades on behalf of clients (acting as a broker) and buys or sells securities for its own account (acting as a dealer). Investors care because broker-dealers provide the plumbing of markets — they place orders, hold or move cash and securities, offer research or advice, and their stability and fees directly affect trade execution, costs, and the safety of client funds; think of them as a combined travel agent and taxi for your investments.

FAQ

What insider transaction did PSIX report on August 20, 2025?
POWER SOLUTIONS INTERNATIONAL (PSIX) reported that Weichai-affiliated entities sold 15,802 shares of common stock on 20 Aug 2025. The sales were executed through broker-dealers under Rule 144 at prices around the $80–$81 range.

Who executed the PSIX insider sales disclosed in this Form 4?
The sales were reported jointly by Weichai America Corp., Weichai Power Co., Ltd. and Shandong Heavy Industry Group Co., Ltd.. Weichai America directly owns the shares, with voting and dispositive power shared among the entities; no individual holds beneficial ownership.

How many PSIX shares did the Weichai entities sell and at what prices?
Weichai-affiliated entities sold 15,802 PSIX common shares. One block of 15,797 shares used a $80.4969 weighted average price within a $80.00–$80.99 range, and an additional 5 shares were sold at $81.0000 per share.

How many PSIX shares do the Weichai entities hold after these sales?
After the reported transactions, the Weichai-affiliated reporting entities hold 10,991,149 PSIX common shares indirectly. This post-transaction balance reflects their remaining stake, with ownership held through entities rather than any individual beneficial owner.

Were the PSIX insider sales by Weichai entities made under Rule 144?
Yes, the filing states the transactions occurred through broker-dealer sales conducted in accordance with Rule 144 under the Securities Act of 1933. This rule governs the public resale of restricted and control securities subject to specified conditions and volume limitations.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4 UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number: 3235-0287
Estimated average burden
hours per response: 0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Weichai America Corp.
(Last) (First) (Middle)
3100 GOLF ROAD
(Street)
ROLLING MEADOWS IL 60008
(City) (State) (Zip)
2. Issuer Name and Ticker or Trading Symbol
POWER SOLUTIONS INTERNATIONAL, INC. [ PSIX ] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
Director X 10% Owner
Officer (give title below) Other (specify below)
3. Date of Earliest Transaction (Month/Day/Year)
08/20/2025
4. If Amendment, Date of Original Filed (Month/Day/Year)
 6. Individual or Joint/Group Filing (Check Applicable Line)
Form filed by One Reporting Person
X Form filed by More than One Reporting Person
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 08/20/2025 S(1) 15,797 D $80.4969(2) 10,991,154 I See Explanation of Responses(3)
Common Stock 08/20/2025 S(1) 5 D $81 10,991,149 I See Explanation of Responses(3)
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year) 7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
1. Name and Address of Reporting Person*
Weichai America Corp.
(Last) (First) (Middle)
3100 GOLF ROAD
(Street)
ROLLING MEADOWS IL 60008
(City) (State) (Zip)
Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
Weichai Power Co., Ltd.
(Last) (First) (Middle)
SECTION A 197, FU SHOU EAST STREET
HIGH-TECH INDUSTRIAL DEV. ZONE
(Street)
WEIFANG, SHANDONG PROVINCE F4 261061
(City) (State) (Zip)
Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
1. Name and Address of Reporting Person*
Shandong Heavy Industry Group Co., Ltd.
(Last) (First) (Middle)
#40-1 YANZI SHAN WEST ROAD
(Street)
JINAN, SHANDONG PROVINCE F4 250014
(City) (State) (Zip)
Relationship of Reporting Person(s) to Issuer
Director X 10% Owner
Officer (give title below) Other (specify below)
Explanation of Responses:
1. These transactions occurred pursuant to broker-dealer sales conducted in accordance with Rule 144 under the Securities Act of 1933, as amended.
2. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $80.00 to $80.99, inclusive. The Reporting Persons (as defined below) undertake to provide the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares of Common Stock sold at each separate price within the range set forth in this footnote.
3. This report is filed jointly by Weichai America Corp., Weichai Power Co., Ltd. and Shandong Heavy Industry Group Co., Ltd. (collectively, the "Reporting Persons"). Weichai America Corp. is the direct owner of the Common Stock referenced in this report and shares the power to vote and the power to dispose of all of such shares of Common Stock with the other Reporting Persons. No individual has beneficial ownership over the Common Stock beneficially owned by the Reporting Persons.
Remarks:
Exhibit List: Exhibit 24.1 - Power of Attorney (Weichai Power Co., Ltd.), incorporated by reference to Exhibit 24.1 to the Form 4 filed by Reporting Persons with the Securities and Exchange Commission on August 14, 2025 Exhibit 24.2 - Power of Attorney (Shandong Heavy Industry Group Co., Ltd.), incorporated by reference to Exhibit 24.2 to the Form 4 filed by Reporting Persons with the Securities and Exchange Commission on August 14, 2025
/s/ Jinguang Liu (aka Jin Liu), Chief Financial Officer, Weichai America Corp. 08/22/2025
/s/ Chenglong Sun, Authorized Representative, Weichai Power Co., Ltd. 08/22/2025
/s/ Chenglong Sun, Authorized Representative, Shandong Heavy Industry Group Co., Ltd. 08/22/2025
** Signature of Reporting Person Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

Source: View Original Filing on SEC EDGAR