STOCK TITAN
  1. Home
  2. Sec-filings
  3. PSIX
  4. [Form 4] Power Solutions International, Inc. Insider Trading Activity

[Form 4] Power Solutions International, Inc. Insider Trading Activity

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

Rhea-AI Filing Summary

Power Solutions International insiders sold 135,846 shares on 08/14/2025 under Rule 144, according to a joint Form 4 filed by Weichai America Corp., Weichai Power Co., Ltd. and Shandong Heavy Industry Group Co., Ltd. The sales were broker-dealer transactions executed at multiple prices, with weighted-average reported prices per lot ranging from $81.8007 to $90.2445 and underlying per-trade ranges from $81.58 to $90.3675. After these dispositions the Reporting Persons report 11,327,978 shares of common stock as indirectly beneficially owned. The report is signed by authorized representatives and references two powers of attorney as exhibits.

Positive

  • None.

Negative

  • None.

Insights

TL;DR: Significant block sales by controlling shareholders; routine Rule 144 dispositions, but reduces insider stake slightly.

The Form 4 shows the Reporting Persons completed multiple Rule 144 brokered sales totaling 135,846 shares on a single date, with reported weighted-average prices for each lot between $81.8007 and $90.2445. These dispositions were filed jointly by three affiliated entities that share voting and dispositive power, leaving 11,327,978 shares held indirectly. For investors, the filing provides clear transaction detail and establishes the timeline and pricing of the insider sales without indicating any derivative exercises or additional transfers.

TL;DR: Filing demonstrates compliant insider reporting and coordinated selling by related entities; governance disclosures are complete.

The report is filed jointly by affiliated Reporting Persons and includes explanatory footnotes describing price ranges and the Rule 144 sales mechanism, plus exhibits for powers of attorney. Signatures from authorized representatives are included, which supports formality and compliance with Section 16 reporting obligations. The filing documents indirect beneficial ownership and clarifies that no single individual holds direct beneficial ownership over the sold shares.

Insider Weichai America Corp., Weichai Power Co., Ltd., Shandong Heavy Industry Group Co., Ltd.
Role 10% Owner | 10% Owner | 10% Owner
Sold 135,846 shs ($11.54M)
Type Security Shares Price Value
Sale Common Stock 7,136 $81.8007 $584K
Sale Common Stock 28,319 $82.6846 $2.34M
Sale Common Stock 30,760 $83.5042 $2.57M
Sale Common Stock 12,430 $84.373 $1.05M
Sale Common Stock 10,485 $85.6346 $898K
Sale Common Stock 14,386 $86.4457 $1.24M
Sale Common Stock 8,834 $87.6413 $774K
Sale Common Stock 13,929 $88.3369 $1.23M
Sale Common Stock 9,312 $89.3299 $832K
Sale Common Stock 255 $90.2445 $23K
Holdings After Transaction: Common Stock — 11,456,688 shares (Indirect, See Explanation of Responses)
Footnotes (1)
  1. These transactions occurred pursuant to broker-dealer sales conducted in accordance with Rule 144 under the Securities Act of 1933, as amended. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $81.58 to $81.925, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.1651 to $82.9893, inclusive. The Reporting Persons 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.00 to $83.995, inclusive. The Reporting Persons 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.00 to $84.87, inclusive. The Reporting Persons 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $85.09 to $85.995, inclusive. The Reporting Persons 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.00 to $86.93, inclusive. The Reporting Persons 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.00 to $87.975, inclusive. The Reporting Persons 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.01 to $88.975, inclusive. The Reporting Persons 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.00 to $89.9876, inclusive. The Reporting Persons 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.1147 to $90.3675, inclusive. The Reporting Persons 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. 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.
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)
08/14/2025
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 08/14/2025 S(1) 7,136 D $81.8007(2) 11,456,688 I See Explanation of Responses(12)
Common Stock 08/14/2025 S(1) 28,319 D $82.6846(3) 11,428,369 I See Explanation of Responses(12)
Common Stock 08/14/2025 S(1) 30,760 D $83.5042(4) 11,397,609 I See Explanation of Responses(12)
Common Stock 08/14/2025 S(1) 12,430 D $84.373(5) 11,385,179 I See Explanation of Responses(12)
Common Stock 08/14/2025 S(1) 10,485 D $85.6346(6) 11,374,694 I See Explanation of Responses(12)
Common Stock 08/14/2025 S(1) 14,386 D $86.4457(7) 11,360,308 I See Explanation of Responses(12)
Common Stock 08/14/2025 S(1) 8,834 D $87.6413(8) 11,351,474 I See Explanation of Responses(12)
Common Stock 08/14/2025 S(1) 13,929 D $88.3369(9) 11,337,545 I See Explanation of Responses(12)
Common Stock 08/14/2025 S(1) 9,312 D $89.3299(10) 11,328,233 I See Explanation of Responses(12)
Common Stock 08/14/2025 S(1) 255 D $90.2445(11) 11,327,978 I See Explanation of Responses(12)
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 $81.58 to $81.925, 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. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $82.1651 to $82.9893, inclusive. The Reporting Persons 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.
4. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $83.00 to $83.995, inclusive. The Reporting Persons 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.
5. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $84.00 to $84.87, inclusive. The Reporting Persons 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.
6. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $85.09 to $85.995, inclusive. The Reporting Persons 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.
7. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $86.00 to $86.93, inclusive. The Reporting Persons 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.
8. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $87.00 to $87.975, inclusive. The Reporting Persons 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.
9. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $88.01 to $88.975, inclusive. The Reporting Persons 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.
10. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $89.00 to $89.9876, inclusive. The Reporting Persons 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.
11. The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $90.1147 to $90.3675, inclusive. The Reporting Persons 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.
12. 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. 08/18/2025
/s/ Chenglong Sun, Authorized Representative, Weichai Power Co., Ltd. 08/18/2025
/s/ Chenglong Sun, Authorized Representative, Shandong Heavy Industry Group Co., Ltd. 08/18/2025
** 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