Tetra Tech (TTEK) director receives 2,208 deferred performance shares

Rhea-AI Filing Summary

Tetra Tech director Kimberly E. Ritrievi reported receiving additional company shares through equity compensation. On 01/12/2026, she acquired 2,208 shares of Tetra Tech common stock at $0 per share, reflecting settlement of previously earned performance stock units.

The footnotes explain that these performance stock units vested on 11/20/2024, were deferred under Tetra Tech's Deferred Compensation Plan, and were settled according to her elected distribution schedule. Following this transaction, she directly beneficially owns 145,408 shares of Tetra Tech common stock.

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^*

Ritrievi Kimberly E

(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)

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

3. Date of Earliest Transaction (Month/Day/Year)
01/12/2026

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	01/12/2026(1)		A		2,208(2)	A	$0	145,408	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 PSUs vested on 11/20/2024 but were deferred pursuant to the Issuer's Deferred Compensation Plan and settled according to the Reporting Person's elected distribution schedule.

2. Shares acquired pursuant to vesting of performance stock units earned under 2018 Equity Incentive Plan.

Remarks:

	/s/ Preston Hopson, Attorney-in-fact for Kimberly E. Ritrievi	01/14/2026
	** 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.

FAQ

What insider transaction did Tetra Tech (TTEK) report for Kimberly E. Ritrievi?

The filing shows that director Kimberly E. Ritrievi acquired 2,208 shares of Tetra Tech common stock on 01/12/2026 through an equity compensation settlement.

How many Tetra Tech shares does Kimberly E. Ritrievi own after this Form 4 transaction?

After the reported transaction, Kimberly E. Ritrievi beneficially owns 145,408 shares of Tetra Tech common stock in direct ownership.

What was the price paid per share in Kimberly E. Ritrievi’s latest TTEK stock acquisition?

The reported acquisition price was $0 per share, indicating the shares were received as part of an equity award rather than purchased on the open market.

What is the source of the 2,208 Tetra Tech shares reported in this Form 4?

The 2,208 shares were acquired upon the vesting of performance stock units that were earned under Tetra Tech’s 2018 Equity Incentive Plan.

When did the performance stock units underlying this TTEK Form 4 actually vest?

The filing notes that the performance stock units vested on 11/20/2024 but were deferred under the company’s Deferred Compensation Plan and later settled on the reported date.

What is Kimberly E. Ritrievi’s relationship to Tetra Tech in this Form 4?

In the Form 4, Kimberly E. Ritrievi is identified as a director of Tetra Tech and the filing is made by a single reporting person.