Sterling Infrastructure director sells 4,000 STRL shares

Sterling Infrastructure director Dana C. O'Brien reported pre-planned stock sales under a Rule 10b5-1 trading plan.

Rhea-AI Filing Summary

Sterling Infrastructure director Dana C. O'Brien reported pre-planned stock sales under a Rule 10b5-1 trading plan. On February 6, 2026, O'Brien sold 1,000 shares of common stock at $390 per share and another 1,000 shares at $400 per share. On February 9, 2026, O'Brien sold an additional 2,000 shares at $410 per share. After these sales, O'Brien beneficially owned 11,498 shares of Sterling Infrastructure common stock, including 751 shares that are restricted and subject to potential forfeiture under certain conditions.

Insider Trade Summary

Net Seller: 4,000 shares

Net Sell 3 txns

Insider O'Brien Dana C.

Role Director

Sold 4,000 shs ($1.61M)

Type	Security	Shares	Price	Value
Sale	Common Stock	2,000	$410.00	$820K
Sale	Common Stock	1,000	$390.00	$390K
Sale	Common Stock	1,000	$400.00	$400K

Holdings After Transaction: Common Stock — 11,498 shares (Direct)

Footnotes (2)

1. F1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025.
2. F2. Of these shares, 751 shares are subject to restrictions on their sale or other transfer and to forfeiture under certain circumstances.

FAQ

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

What insider transaction did Dana C. O'Brien report at Sterling Infrastructure (STRL)?

Dana C. O'Brien reported selling 4,000 shares of Sterling Infrastructure common stock. The sales occurred in three trades at prices of $390, $400, and $410 per share, and were executed under a pre-arranged Rule 10b5-1 trading plan.

On what dates did the STRL director’s reported stock sales take place?

The reported stock sales took place on February 6, 2026 and February 9, 2026. Two separate 1,000-share sales occurred on February 6, followed by a 2,000-share sale on February 9, all involving Sterling Infrastructure common stock.

What prices were received in the reported Sterling Infrastructure (STRL) stock sales?

The reported sales were executed at three different prices: $390 per share, $400 per share, and $410 per share. Each price corresponds to a separate transaction involving Sterling Infrastructure common stock sold by director Dana C. O'Brien.

How many Sterling Infrastructure shares does Dana C. O'Brien hold after the reported trades?

After the reported trades, Dana C. O'Brien beneficially owns 11,498 shares of Sterling Infrastructure common stock. This total includes both unrestricted shares and 751 shares that are subject to sale restrictions and possible forfeiture under certain conditions.

Were the STRL insider sales made under a Rule 10b5-1 trading plan?

Yes. The filing states the sales were effected under a Rule 10b5-1 trading plan adopted by Dana C. O'Brien on November 6, 2025. Such plans allow pre-scheduled trading, helping separate routine portfolio moves from discretionary timing decisions.

What portion of Dana C. O'Brien’s STRL holdings are restricted shares?

Out of the 11,498 shares beneficially owned after the transactions, 751 shares are restricted. These restricted shares are subject to limits on sale or transfer and can be forfeited if certain specified conditions occur, as disclosed in the filing footnote.

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

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Accepted by SEC EDGAR 02/10/2026 - 05:08 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).

X

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^*

O'Brien Dana C.

(Last) (First) (Middle)

1800 HUGHES LANDING BLVD.

(Street)

THE WOODLANDS TX 77380

(City) (State) (Zip)

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

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

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

3. Date of Earliest Transaction (Month/Day/Year)
02/06/2026

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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/06/2026		S		1,000(1)	D	$390	14,498(2)	D
Common Stock	02/06/2026		S		1,000(1)	D	$400	13,498(2)	D
Common Stock	02/09/2026		S		2,000(1)	D	$410	11,498(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. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 6, 2025.

2. Of these shares, 751 shares are subject to restrictions on their sale or other transfer and to forfeiture under certain circumstances.

Remarks:

	Mark D. Wolf (Under a Power of Attorney)	02/10/2026
	** 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.