Tetra Tech (TTEK) SVP stock sale leaves 46,496 shares owned

Rhea-AI Filing Summary

Tetra Tech, Inc. senior vice president and corporate controller Brian N. Carter reported an open-market sale of company stock. On February 4, 2026, he sold 9,979 shares of common stock at a weighted average price of $40.225 per share, executed in multiple trades within a narrow price range. After this transaction, he beneficially owns 46,496 shares of Tetra Tech common stock, held directly.

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

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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^*

CARTER BRIAN N

(Last) (First) (Middle)

3475 EAST FOOTHILL BOULEVARD

(Street)

PASADENA CA 91107

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
TETRA TECH INC [ TTEK ]

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

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP, Corporate Controller

3. Date of Earliest Transaction (Month/Day/Year)
02/04/2026

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	02/04/2026		S		9,979	D	$40.225(1)	46,496	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 sold in multiple transactions at prices ranging from $40.2244 to $40.225, inclusive.

Remarks:

	/s/ Preston Hopson, Attorney-in-fact for Brian N. Carter	02/06/2026
	** 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.
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FAQ

What insider transaction did Tetra Tech (TTEK) report for Brian N. Carter?

Tetra Tech reported that SVP and Corporate Controller Brian N. Carter sold 9,979 shares of common stock on February 4, 2026 at a weighted average price of $40.225 per share, as disclosed in a Form 4 filing.

At what price did the Tetra Tech SVP sell his TTEK shares?

The reported sale by Tetra Tech SVP Brian N. Carter used a weighted average price of $40.225 per share. The filing notes the trades occurred in multiple transactions, with prices ranging narrowly from $40.2244 to $40.225 per share.

How many Tetra Tech (TTEK) shares does Brian N. Carter own after the reported sale?

After selling 9,979 shares, Tetra Tech SVP Brian N. Carter beneficially owns 46,496 shares of Tetra Tech common stock. The Form 4 indicates these shares are held with direct ownership, meaning they are not reported as indirectly held through another entity.

What role does Brian N. Carter hold at Tetra Tech (TTEK) in this Form 4?

In the Form 4, Brian N. Carter is identified as an officer of Tetra Tech with the title SVP, Corporate Controller. He is not listed as a director or 10% owner, but as a reporting person due to his executive officer status.

Was the Tetra Tech (TTEK) insider sale executed in a single trade or multiple trades?

The Form 4 explains that the reported price $40.225 is a weighted average. The 9,979 shares were sold in multiple transactions on February 4, 2026 at prices ranging from $40.2244 to $40.225 per share, inclusive.

Is Brian N. Carter’s ownership in Tetra Tech (TTEK) reported as direct or indirect?

The filing shows that after the transaction, 46,496 shares of Tetra Tech common stock are held with direct ownership by Brian N. Carter. No nature-of-ownership footnote indicates an LLC, trust, or other indirect holding in this particular transaction.