FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Hudkins Jill
  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)
President
(Last)
(First)
(Middle)
3475 E. FOOTHILL BLVD.		 3. Date of Earliest Transaction (Month/Day/Year)
04/26/2023
(Street)

PASADENA, CA 91107		 4. If Amendment, Date 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
(City)
(State)
(Zip)
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 04/26/2023   M   250 A $ 0 2,774 D  
COMMON STOCK 04/26/2023   F   123 (1) D $ 135.35 2,651 D  
COMMON STOCK 04/26/2024   M   250 A $ 0 2,936 (2) D  
COMMON STOCK 04/26/2024   F   108 (3) D $ 192.5 2,828 D  

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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 Underlying Securities
(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 of Derivative Security: 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
RESTRICTED STOCK UNITS $ 0 04/26/2023   M     250 04/26/2022(4)   (5) COMMON STOCK 250 $ 0 500 D  
RESTRICTED STOCK UNITS $ 0 04/26/2024   M     250 04/26/2022(4)   (5) COMMON STOCK 250 $ 0 250 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Hudkins Jill
3475 E. FOOTHILL BLVD.
PASADENA, CA 91107		       President  

Signatures

 /s/ Preston Hopson, Attorney-in-Fact for Jill Hudkins   04/30/2024
**Signature of Reporting Person Date

Explanation of Responses:

* 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).
(1) Represents shares withheld to pay the related tax liability of the restricted stock units that vested on 4/26/2023.
(2) Amount of securities beneficially owned was updated to reflect that 35 shares of common stock were acquired by the Reporting Person on December 15, 2023, pursuant to the Tetra Tech, Inc. Employee Stock Purchase Plan (ESPP).
(3) Represents shares withheld to pay the related tax liability of the restricted stock units that vested on 4/26/2024.
(4) The RSUs became vested as to 25% of the shares on April 26, 2022, and 25% of the shares on each anniversary date thereafter until fully vested.
(5) The RSUs are exercisable at the time of vesting and do not have a set expiration date.

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