Sterling Infrastructure grants counsel 1,000 stock units

The two awards have separate service-conditioned vesting schedules, with installments beginning December 31, 2026, and October 5, 2027.

Rhea-AI Filing Summary

Sterling Infrastructure, Inc. (STRL) General Counsel & CCO Katherine Hargis received two common-stock awards on October 5, 2026: 1,000 restricted stock units in connection with joining the company and 87 time-vested restricted stock units. The 1,000-unit award vests in one-third increments on October 5, 2027, and the next two anniversaries, subject to service conditions. The 87-unit award vests in one-third increments on December 31, 2026, and the next two anniversaries, subject to service conditions.

Insider Trade Summary

Grant/Award: 1,087 shares

Grant/Award 2 txns

Insider Hargis Katherine

Role General Counsel & CCO

Type	Security	Shares	Price	Value
Grant/Award	Common Stock F1	1,000	$0.00	$0.00
Grant/Award	Common Stock F2	87	$0.00	$0.00

Holdings After Transaction: Common Stock — 1,087 shares (Direct)

Footnotes (2)

1. F1. Represents the grant of restricted stock units awarded to the Reporting Person in connection with her joining the Issuer. The award will vest in one-third increments on each of October 5, 2027 and the next two anniversaries thereof, providing the service conditions are satisfied.
2. F2. Represents the grant of time-vested restricted stock units that will vest in one-third increments on each of December 31, 2026 and the next two anniversaries thereof, provided the service conditions aresatisfied.

Key Figures

Restricted stock units awarded: 1,000 RSUs Time-vested restricted stock units awarded: 87 RSUs Vesting schedule for 1,000 RSUs: One-third increments beginning October 5, 2027 +1 more

4 metrics

Restricted stock units awarded 1,000 RSUs Awarded in connection with Katherine Hargis joining Sterling Infrastructure

Time-vested restricted stock units awarded 87 RSUs Awarded to Katherine Hargis

Vesting schedule for 1,000 RSUs One-third increments beginning October 5, 2027 The next two anniversaries are also vesting dates, subject to service conditions

Vesting schedule for 87 RSUs One-third increments beginning December 31, 2026 The next two anniversaries are also vesting dates, subject to service conditions

Key Terms

restricted stock units, time-vested restricted stock units, service conditions

3 terms

restricted stock units financial

"grant of restricted stock units awarded to the Reporting Person"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

time-vested restricted stock units financial

"grant of time-vested restricted stock units"

service conditions financial

"providing the service conditions are satisfied"

FAQ

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

How many RSUs did STRL’s general counsel receive?

Katherine Hargis received two awards on October 5, 2026: 1,000 restricted stock units in connection with joining Sterling Infrastructure and 87 time-vested restricted stock units.

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

Form 4 Insider Transactions: What Each Field Means →

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Available on EDGAR 10/07/2026 - 04:22 PM Accepted by SEC EDGAR 10/07/2026 - 04:21 PM Learn about SEC filing dates

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^*

Hargis Katherine

(Last) (First) (Middle)

1800 HUGHES LANDING BLVD

STE. 250

(Street)

THE WOODLANDS TEXAS 77380

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
STERLING INFRASTRUCTURE, INC. [ STRL ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	General Counsel & CCO

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/05/2026

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	10/05/2026		A		1,000	A	$0	1,000(1)	D
Common Stock	10/05/2026		A		87	A	$0	1,087(2)	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. Represents the grant of restricted stock units awarded to the Reporting Person in connection with her joining the Issuer. The award will vest in one-third increments on each of October 5, 2027 and the next two anniversaries thereof, providing the service conditions are satisfied.

2. Represents the grant of time-vested restricted stock units that will vest in one-third increments on each of December 31, 2026 and the next two anniversaries thereof, provided the service conditions aresatisfied.

Remarks:

	Nicholas M. Grindstaff (Under a Power of Attorney)	10/07/2026
	** 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)