Pioneer Power (PPSI) CEO exercises stock options for 1,000 shares

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Form Type

Rhea-AI Filing Summary

Pioneer Power Solutions, Inc. director and Chief Executive Officer Nathan Mazurek reported an option exercise on Common Stock.

On March 2, 2026, he exercised a stock option for 1,000 shares at $2.18 per share, increasing his directly held Common Stock to 1,977,496 shares. The filing notes the options were already fully vested as of March 10, 2017, before this exercise.

Insider Trade Summary

Net Buyer: 1,000 shares

Net Buy 2 txns

Insider MAZUREK NATHAN

Role Chief Executive Officer

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy)	1,000	$0.00	$0.00
Exercise	Common Stock, par value $0.001 per share	1,000	$2.18	$2K

Holdings After Transaction: Stock Option (Right to Buy) — 0 shares (Direct); Common Stock, par value $0.001 per share — 1,977,496 shares (Direct)

Footnotes (1)

F1. As of March 10, 2017, and prior to this transaction, the exercised options were fully vested.

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Form 4 Insider Transactions: What Each Field Means →

Accepted by SEC EDGAR 03/03/2026 - 05:15 PM

FAQ

What insider transaction did PPSI report on this Form 4?

Pioneer Power Solutions reported that CEO and director Nathan Mazurek exercised stock options for 1,000 shares of Common Stock on March 2, 2026. The transaction converted a derivative award into directly held shares at a stated price of $2.18 per share.

How many Pioneer Power (PPSI) shares did Nathan Mazurek acquire?

Nathan Mazurek acquired 1,000 shares of Pioneer Power Common Stock through an option exercise. This derivative conversion increased his directly held position, as reported in the filing, without any corresponding sale or disposition of shares on that date.

What price was reported for the PPSI shares from the option exercise?

The Form 4 shows a transaction price of $2.18 per share for the 1,000 Pioneer Power Common shares received from exercising the option. This figure reflects the per-share value used to report the derivative conversion into Common Stock.

What is Nathan Mazurek’s PPSI shareholding after this transaction?

After the March 2, 2026 option exercise, Nathan Mazurek directly holds 1,977,496 shares of Pioneer Power Common Stock. This total, disclosed in the filing, represents his direct ownership following conversion of 1,000 option shares into Common Stock.

Did Nathan Mazurek sell any Pioneer Power (PPSI) shares in this Form 4?

The Form 4 reports only derivative exercises classified as acquisitions and does not show any sales or dispositions. Both transactions are coded as option exercises that converted derivative rights into 1,000 shares of directly held Pioneer Power Common Stock.

Were the PPSI stock options already vested before this exercise?

Yes. A footnote states the options exercised on March 2, 2026 were fully vested as of March 10, 2017. This indicates the award had been fully earned long before conversion into 1,000 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

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)
03/02/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock, par value $0.001 per share	03/02/2026		M		1,000	A	$2.18	1,977,496	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
Stock Option (Right to Buy)	$2.18	03/02/2026		M			1,000	03/10/2017⁽¹⁾	03/10/2026	Common Stock	1,000	$0	0	D

Explanation of Responses:

1. As of March 10, 2017, and prior to this transaction, the exercised options were fully vested.

	/s/ Walter Michalec, attorney-in-fact	03/03/2026
	** 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