[Form 4] Tetra Tech Inc Insider Trading Activity

Rhea-AI Filing Summary

Gary Birkenbeuel, a director of Tetra Tech, Inc. (TTEK), reported a sale of common stock on 08/14/2025. The Form 4 shows 2,390 shares sold at an exact price of $36.0042 per share, leaving 37,725 shares beneficially owned after the transaction. The filing notes that a 5-for-1 forward stock split effective September 6, 2024 increased the prior balance by 32,092 shares. The Form 4 was signed on behalf of the reporting person by an attorney-in-fact on 08/15/2025. No derivative transactions or additional transactions are reported.

Insights

Financial Analyst

TL;DR Director sale of 2,390 TTEK shares at $36.0042 is a routine insider transaction with no disclosed derivatives or other material events.

The reported sale reduces the director's direct holdings to 37,725 shares. The filing explicitly records the effect of a prior 5-for-1 forward split that increased the share count. There are no other transactions or compensatory grants disclosed. From a market-impact perspective this isolated sale is small relative to typical market volumes and provides limited new information about company fundamentals.

Corporate Governance Expert

TL;DR This Form 4 documents a standard director share disposition and contains clear disclosure about post-split share counts and signature authority.

The form identifies the reporting person as a director and the transaction code as a sale. The inclusion of a power-of-attorney signature is properly disclosed. There are no indications of plan-based trades or Rule 10b5-1 statements in the filing. Governance-wise, the filing appears compliant and routine, without signs of unusual insider activity.

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
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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^*

Birkenbeuel Gary

(Last) (First) (Middle)

3475 EAST FOOTHILL BLVD.

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
08/14/2025

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	08/14/2025		S		2,390	D	$36.0042(1)	37,725(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. All shares sold at an exact price.

2. On September 6, 2024, the balance of 8,023 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 32,092 shares of common stock.

Remarks:

	/s/ Preston Hopson, Attorney-in-fact for Gary Birkenbeuel	08/15/2025
	** 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.

FAQ

What did Gary Birkenbeuel report on the TTEK Form 4?

The Form 4 reports a sale of 2,390 shares of TTEK common stock on 08/14/2025 at $36.0042 per share, leaving 37,725 shares beneficially owned.

Does the filing disclose any option or derivative transactions for TTEK?

No. Table II for derivative securities shows no transactions reported in this filing.

Why does the Form 4 show an increased share balance for Mr. Birkenbeuel?

The filing explains a 5-for-1 forward stock split effective September 6, 2024, which increased the prior balance by 32,092 shares.

Who signed the Form 4 for Gary Birkenbeuel and when?

The Form 4 was signed by Preston Hopson, Attorney-in-fact for Gary Birkenbeuel on 08/15/2025.

Is there any indication the sale was made under a Rule 10b5-1 plan?

The filing does not check or state that the transaction was made pursuant to a Rule 10b5-1 plan.