Primoris director Mashinski receives $42.5K stock grant

The restricted shares are subject to a 12-month sale restriction, with their grant value set at $42,500.

Available on EDGAR 11/03/2026 - 06:00 PM EST Accepted by SEC EDGAR 11/03/2026 - 06:00 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

Primoris Services Corp director Carla S. Mashinski received a compensation-related grant of 571 shares of restricted stock on October 30, 2026. The director compensation program assigned the grant a value of $42,500, based on the average closing price during June 2026. The shares cannot be sold for 12 months from the grant date. Her directly held common stock position following the grant was 23,019 shares.

Insider Trade Summary

Grant/Award: 571 shares

Grant/Award 1 txn

Insider MASHINSKI CARLA S

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	571	--	--

Holdings After Transaction: Common Stock — 23,019 shares (Direct)

Footnotes (1)

1. F1. The non-employee director compensation program adopted by the Board in May 2011 and updated July 2026, provides for the issuance of restricted stock with a value of $42,500. The price per share was based on the average closing price during June 2026, resulting in a grant of 571 shares of stock. The shares of stock cannot be sold for a period of twelve months from the date of grant.

Key Figures

Restricted stock grant: 571 shares Grant value: $42,500 Sale restriction: 12 months +1 more

4 metrics

Restricted stock grant 571 shares Granted October 30, 2026

Grant value $42,500 Restricted stock grant; based on the average closing price during June 2026

Sale restriction 12 months From the grant date

Direct common stock holdings 23,019 shares Following the October 30, 2026 grant

Key Terms

restricted stock, average closing price, non-employee director compensation program

3 terms

restricted stock financial

"issuance of restricted stock with a value of $42,500"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

average closing price financial

"price per share was based on the average closing price during June 2026"

The average closing price is the arithmetic mean of a security’s end-of-day prices over a chosen period, found by adding each day’s closing price and dividing by the number of days. It smooths out daily ups and downs to show a typical market value—like averaging daily temperatures to understand a month’s climate—and helps investors spot trends, judge whether a stock is generally rising or falling, and make clearer buy or sell decisions.

non-employee director compensation program financial

"The non-employee director compensation program adopted by the Board"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many PRIM shares did director Carla S. Mashinski receive?

Carla S. Mashinski received a grant of 571 shares of restricted stock on October 30, 2026, with a stated value of $42,500.

When can Carla S. Mashinski sell the restricted shares?

The shares cannot be sold for 12 months from the October 30, 2026 grant date.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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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^*

MASHINSKI CARLA S

(Last) (First) (Middle)

C/O PRIMORIS SERVICES CORPORATION

2300 N. FIELD STREET, SUITE 1900

(Street)

DALLAS TEXAS 75201

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Primoris Services Corp [ PRIM ]

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

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/30/2026

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

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

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

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	10/30/2026		A		571	A	(1)	23,019	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 non-employee director compensation program adopted by the Board in May 2011 and updated July 2026, provides for the issuance of restricted stock with a value of $42,500. The price per share was based on the average closing price during June 2026, resulting in a grant of 571 shares of stock. The shares of stock cannot be sold for a period of twelve months from the date of grant.

	/s/ Kenneth M. Dodgen, Attorney-in-Fact	11/03/2026
	** 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.
* Form 4: SEC 1474 (03-26)