PPSI insider boosts stake to 1,976,496 Pioneer Power shares

Rhea-AI Filing Summary

Pioneer Power Solutions, Inc. (PPSI) reported an insider stock purchase by its Chief Executive Officer, who is also a director and 10% owner. On 11/18/2025, the reporting person bought 10,000 shares of common stock in an open-market transaction at a weighted average price of $3.387 per share, with individual trades executed between $3.33 and $3.45. Following this purchase, the insider directly beneficially owns 1,976,496 shares of Pioneer Power common stock.

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^*

MAZUREK NATHAN

(Last) (First) (Middle)

C/O PIONEER POWER SOLUTIONS, INC.

400 KELBY STREET, 12TH FLOOR

(Street)

FORT LEE NJ 07024

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
PIONEER POWER SOLUTIONS, INC. [ PPSI ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director	X	10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Executive Officer

3. Date of Earliest Transaction (Month/Day/Year)
11/18/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	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, par value $0.001 per share	11/18/2025		P		10,000	A	$3.387(1)	1,976,496	D

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

Explanation of Responses:

1. The price reported in Column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $3.33 to $3.45, inclusive. The reporting person undertakes to provide to the Issuer, any security holder, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in footnote (1) to this Form 4.

	/s/ Walter Michalec, attorney-in-fact	11/20/2025
	** 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.

FAQ

What insider transaction did PPSI report in this Form 4?

Pioneer Power Solutions, Inc. reported that a director, 10% owner, and Chief Executive Officer purchased 10,000 shares of its common stock in an open-market transaction.

On what date did the PPSI insider buy shares and at what price?

The insider purchase occurred on 11/18/2025 at a weighted average price of $3.387 per share, with trades executed between $3.33 and $3.45.

How many PPSI shares does the insider beneficially own after this transaction?

After the reported transaction, the insider directly beneficially owns 1,976,496 shares of Pioneer Power Solutions common stock.

What is the insider’s relationship to Pioneer Power Solutions (PPSI)?

The reporting person is a director, a 10% owner, and serves as the company’s Chief Executive Officer.

How was the PPSI purchase price of $3.387 per share calculated?

The reported price of $3.387 per share is a weighted average of multiple trades, with individual purchase prices ranging from $3.33 to $3.45, inclusive.

Can investors obtain more detail on the individual PPSI trade prices in this Form 4?

Yes. The insider has stated they will provide, upon request, full information on the number of shares purchased at each separate price within the $3.33 to $3.45 range.