Tetra Tech director granted 1,259 RSUs

Thornburg Eric W reported acquisition or exercise transactions in this Form 4 filing.

Accepted by SEC EDGAR 04/28/2026 - 07:35 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Thornburg Eric W reported acquisition or exercise transactions in this Form 4 filing.

Tetra Tech director Eric W. Thornburg received a grant of 1,259 restricted stock units (RSUs), each representing a contingent right to receive one share of Tetra Tech common stock. The RSUs will become 100% vested on April 27, 2027 and are exercisable at that time with no set expiration date. Following this award, Thornburg holds 1,259 RSUs directly.

Insider Trade Summary

Grant/Award: 1,259 shares

Grant/Award 1 txn

Insider Thornburg Eric W

Role Director

Type	Security	Shares	Price	Value
Grant/Award	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,259	$0.00	$0.00

Holdings After Transaction: RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) — 1,259 units (Direct)

Holdings Before and After: RESTRICTED STOCK UNITS (RIGHT TO RECEIVE), 0 to 1,259 units (Direct)

Footnotes (3)

1. F1. Represents an award of restricted stock units (RSUs), each unit of which represents a contingent right to receive one share of Tetra Tech common stock.
2. F2. The RSUs become 100% vested as to the shares underlying the RSUs on April 27, 2027.
3. F3. The RSUs are exercisable at the time of vesting and do not have a set expiration date.

Key Figures

RSUs granted: 1,259 units RSU grant price: $0.00 per unit Underlying shares: 1,259 shares +2 more

5 metrics

RSUs granted 1,259 units Restricted stock units awarded to director Eric W. Thornburg

RSU grant price $0.00 per unit Compensation grant with no cash exercise price

Underlying shares 1,259 shares Each RSU represents one share of common stock

Vesting date April 27, 2027 RSUs become 100% vested on this date

Holdings after grant 1,259 RSUs Total restricted stock units held directly after transaction

Key Terms

restricted stock units, contingent right, vested, exercisable

4 terms

restricted stock units financial

"Represents an award of restricted stock units (RSUs), each unit of which represents a contingent right"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

contingent right financial

"each unit of which represents a contingent right to receive one share of Tetra Tech common stock"

vested financial

"The RSUs become 100% vested as to the shares underlying the RSUs on April 27, 2027"

exercisable financial

"The RSUs are exercisable at the time of vesting and do not have a set expiration date"

FAQ

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

What insider transaction did TETRA TECH INC (TTEK) report for Eric W. Thornburg?

TETRA TECH INC reported that director Eric W. Thornburg received 1,259 restricted stock units. Each RSU represents a contingent right to one share of common stock, vesting fully on April 27, 2027, and exercisable at vesting with no set expiration date.

How many restricted stock units did Eric W. Thornburg receive at TTEK?

Eric W. Thornburg received 1,259 restricted stock units from TETRA TECH INC. Each RSU corresponds to one share of common stock, giving him 1,259 underlying shares upon vesting and exercise, assuming all units vest and are settled in stock as described.

When do Eric W. Thornburg’s TETRA TECH INC RSUs vest?

Eric W. Thornburg’s restricted stock units at TETRA TECH INC become 100% vested on April 27, 2027. On that vesting date, the RSUs are exercisable, allowing settlement into common shares, and they do not carry a specified expiration date thereafter.

What does each RSU granted to Eric W. Thornburg at TTEK represent?

Each RSU granted to Eric W. Thornburg represents a contingent right to receive one share of TETRA TECH INC common stock. This means he will receive one share per unit upon vesting and exercise, subject to the award’s terms and the April 27, 2027 vesting schedule.

Does Eric W. Thornburg’s RSU award at TETRA TECH INC have an expiration date?

The RSU award to Eric W. Thornburg does not have a set expiration date. According to the disclosure, the RSUs become exercisable when they vest on April 27, 2027 and remain exercisable afterward without a specified end date in the award terms.

How many TETRA TECH INC RSUs does Eric W. Thornburg hold after this transaction?

After this transaction, Eric W. Thornburg holds 1,259 restricted stock units directly at TETRA TECH INC. These RSUs correspond to 1,259 underlying shares of common stock, subject to full vesting on April 27, 2027 and subsequent exercise under the award terms.

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

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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^*

Thornburg Eric W

(Last) (First) (Middle)

3475 E. FOOTHILL BLVD

(Street)

PASADENA CALIFORNIA 91107

(City) (State) (Zip)

UNITED STATES

(Country)

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)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/27/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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

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
RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	(1)	04/27/2026		A		1,259		(2)	(3)	COMMON STOCK	1,259	$0	1,259	D

Explanation of Responses:

1. Represents an award of restricted stock units (RSUs), each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

2. The RSUs become 100% vested as to the shares underlying the RSUs on April 27, 2027.

3. The RSUs are exercisable at the time of vesting and do not have a set expiration date.

Remarks:

	/s/ Preston Hopson, Attorney-in-fact for Eric W. Thornburg	04/28/2026
	** 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.
* Form 4: SEC 1474 (03-26)