TTEK · Tetra Tech Inc

$35.91 -0.38 (-1.05%) At close · Sep 4

S&P 400 member Russell 1000 member Rebalance outlook locked

Customer concentration — key customers 37% of revenue

Key customers — 37% of revenue (fiscal 2025)

“Approximately 32%, 14%, 17% and 37% of our fiscal 2025 revenue was generated from our U.S. federal government, U.S. state and local government, U.S. commercial and international clients, respectively.”

Key customers — 32% of revenue (fiscal 2025)

“Approximately 32%, 14%, 17% and 37% of our fiscal 2025 revenue was generated from our U.S. federal government, U.S. state and local government, U.S. commercial and international clients, respectively.”

Key customers — 17% of revenue (fiscal 2025)

“Approximately 32%, 14%, 17% and 37% of our fiscal 2025 revenue was generated from our U.S. federal government, U.S. state and local government, U.S. commercial and international clients, respectively.”

Key customers — 14% of revenue (fiscal 2025)

“Approximately 32%, 14%, 17% and 37% of our fiscal 2025 revenue was generated from our U.S. federal government, U.S. state and local government, U.S. commercial and international clients, respectively.”

Key customers — 27% of receivables (fiscal 2025 year-end)

“Approximately 27% of accounts receivable were due from various agencies of the U.S. federal government at fiscal 2025 year-end.”

View the 10-K filed Nov 20, 2025

Market Cap

$9.19B

256.04M

Trades by corporate insiders — officers, directors and holders of more than 10% of the shares — disclosed to the SEC on Forms 4 and 5. Form 3 supplies initial ownership rather than a trade; Form 4 must be filed within two business days of the trade.

Query insider transactions through the insider trading API or MCP →

Date	Insider	Role	Type	Security	Shares	Price	Value	After
2026-08-04	Volpi Kirsten M	Director	Convert↑	COMMON STOCK	2,300	$9.59	$22,057	74,218
2026-08-04	Volpi Kirsten M	Director	Convert↓ Filing footnotes — STOCK OPTION (RIGHT TO BUY) (Direct) The option becomes exercisable as to 100% of the shares on the anniversary of the grant date.	STOCK OPTION (RIGHT TO BUY)	2,300	—	—	4,000
2026-06-04	Volpi Kirsten M	Director	Convert↑	COMMON STOCK	1,700	$9.59	$16,303	71,918
2026-06-04	Volpi Kirsten M	Director	Convert↓ Filing footnotes — STOCK OPTION (RIGHT TO BUY) (Direct) The option becomes exercisable as to 100% of the shares on the anniversary of the grant date.	STOCK OPTION (RIGHT TO BUY)	1,700	—	—	6,300
2026-05-15	Feeler Jeffrey R	Director	Buy↑	COMMON STOCK	1,900	$26.41	$50,179	1,900
2026-04-27	Thornburg Eric W	Director	Award↑ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on April 27, 2027. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,259	—	—	1,259
2026-03-16	Ritrievi Kimberly E	Director	Convert↑	COMMON STOCK	4,500	—	—	149,908
2026-03-16	Ritrievi Kimberly E	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,925	—	—	1,925
2026-03-16	Ritrievi Kimberly E	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	4,500	—	—	0
2026-03-16	Ritrievi Kimberly E	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	2,910	—	—	0
2026-03-16	Ritrievi Kimberly E	Director	Convert↑	COMMON STOCK	1,925	—	—	154,083
2026-03-16	Ritrievi Kimberly E	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. The RSUs are exercisable at the time of vesting and do not have a set expiration date. On September 6, 2024, the balance of 425 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,700 shares of common stock.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	2,125	—	—	0
2026-03-16	Ritrievi Kimberly E	Director	Convert↑	COMMON STOCK	795	—	—	159,838
2026-03-16	Ritrievi Kimberly E	Director	Award↑ Filing footnotes — COMMON STOCK (Direct) Shares acquired pursuant to vesting of performance stock units ("PSU") earned under 2018 Equity Incentive Plan. The PSUs vested between 11/23/2021 and 11/18/2025 but were deferred under the Issuer's Deferred Compensation Plan and have settled upon retirement.	COMMON STOCK	25,883	—	—	192,259
2026-03-16	Ritrievi Kimberly E	Director	Convert↑	COMMON STOCK	2,125	—	—	164,658
2026-03-16	Ritrievi Kimberly E	Director	Convert↑	COMMON STOCK	1,718	—	—	166,376
2026-03-16	Ritrievi Kimberly E	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. The RSUs are exercisable at the time of vesting and do not have a set expiration date. On September 6, 2024, the balance of 410 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,640 shares of common stock.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	2,050	—	—	0
2026-03-16	Ritrievi Kimberly E	Director	Convert↑	COMMON STOCK	2,050	—	—	159,043
2026-03-16	Ritrievi Kimberly E	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	2,250	—	—	2,250
2026-03-16	Ritrievi Kimberly E	Director	Convert↑	COMMON STOCK	2,250	—	—	152,158
2026-03-16	Ritrievi Kimberly E	Director	Convert↑	COMMON STOCK	795	—	—	160,633
2026-03-16	Ritrievi Kimberly E	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. The RSUs are exercisable at the time of vesting and do not have a set expiration date. On September 6, 2024, the balance of 159 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 636 shares of common stock.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	795	—	—	0
2026-03-16	Ritrievi Kimberly E	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,718	—	—	0
2026-03-16	Ritrievi Kimberly E	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. The RSUs are exercisable at the time of vesting and do not have a set expiration date. On September 6, 2024, the balance of 380 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,520 shares of common stock.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,900	—	—	0
2026-03-16	Ritrievi Kimberly E	Director	Convert↑	COMMON STOCK	2,910	—	—	156,993
2026-03-16	Ritrievi Kimberly E	Director	Convert↑	COMMON STOCK	1,900	—	—	162,533
2026-03-16	Ritrievi Kimberly E	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date. The RSUs are exercisable at the time of vesting and do not have a set expiration date. On September 6, 2024, the balance of 159 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 636 shares of common stock.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	795	—	—	0
2026-02-19	Obiaya Christiana	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. Vesting of the RSUs, which was initially scheduled for November 18, 2026, was accelerated on the Reporting Person's retirement from the Issuer's board of directors. The RSUs are exercisable at the time of vesting and do not have a set expiration date. Balance of 1,469 RSUs were cancelled upon retirement.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	495	—	—	0
2026-02-19	Argus Roger R	President and CEO	Award↑ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become vested as to 25% of the shares on February 19, 2027, and 25% annually, thereafter, until fully vested. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	28,174	—	—	28,174
2026-02-19	Obiaya Christiana	Director	Convert↑	COMMON STOCK	495	—	—	9,666
2026-02-10	Volpi Kirsten M	Director	Convert↑	COMMON STOCK	1,000	$9.59	$9,590	70,218
2026-02-10	Volpi Kirsten M	Director	Convert↓ Filing footnotes — STOCK OPTION (RIGHT TO BUY) (Direct) The option becomes exercisable as to 100% of the shares on the anniversary of the grant date.	STOCK OPTION (RIGHT TO BUY)	1,000	—	—	8,000
2026-02-06	BURDICK STEVEN M	EVP, CFO	Gift↓ Filing footnotes — COMMON STOCK (Direct) Bona fide gift to charitable organization. No compensation was given to the donor for the gifting of shares. The balance of 149,351 shares includes 132 shares of common stock that were acquired by the Reporting Person on December 15, 2025, pursuant to the Tetra Tech, Inc. Employee Stock Purchase Plan (ESPP).	COMMON STOCK	11,100	—	—	138,251
2026-02-04	CARTER BRIAN N	SVP, Corporate Controller	Sell↓ Filing footnotes — COMMON STOCK (Direct) 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.	COMMON STOCK	9,979	$40.23	$401,405	46,496
2026-01-26	Feeler Jeffrey R	Director	Award↑ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become exercisable as to 100% of the shares on the first anniversary of the grant date. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,754	—	—	1,754
2026-01-26	Hardwick M Susan	Director	Award↑ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become exercisable as to 100% of the shares on the first anniversary of the grant date. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,754	—	—	1,754
2026-01-12	Ritrievi Kimberly E	Director	Award↑ Filing footnotes — COMMON STOCK (Direct) 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. Shares acquired pursuant to vesting of performance stock units earned under 2018 Equity Incentive Plan.	COMMON STOCK	2,208	—	—	145,408
2026-01-12	Birkenbeuel Gary	Director	Award↑ Filing footnotes — COMMON STOCK (Direct) 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. Shares acquired pursuant to vesting of performance stock units earned under 2018 Equity Incentive Plan.	COMMON STOCK	4,397	—	—	51,032
2026-01-12	Birkenbeuel Gary	Director	Convert↑	COMMON STOCK	1,590	—	—	46,635
2026-01-12	Birkenbeuel Gary	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. On September 6, 2024, the balance of 318 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,272 shares of common stock. The restricted stock units (RSUs) became 100% vested as to the shares underlying the RSUs on November 18, 2022, but were deferred pursuant to the Issuer's Deferred Compensation Plan and settled according to the Reporting Person's elected distribution schedule. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,590	—	—	0
2025-11-30	CARTER BRIAN N	SVP, Corporate Controller	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock. The RSUs become vested as to 25% of the shares on November 30, 2024, and 25% annually, thereafter, until fully vested. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,520	—	—	3,030
2025-11-30	BATRACK DAN L	Director, Chairman and CEO	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become vested as to 25% of the shares on November 30, 2024, and 25% annually, thereafter, until fully vested. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	21,255	—	—	42,505
2025-11-30	Obiaya Christiana	Director	Convert↑	COMMON STOCK	1,718	—	—	9,171
2025-11-30	Obiaya Christiana	Director	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) 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. The RSUs become 100% vested as to the shares underlying the RSUs on November 30, 2025. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,718	—	—	0
2025-11-30	Hopson Preston	EVP, Chief Legal/Human Capital	Convert↑	COMMON STOCK	2,455	—	—	85,186
2025-11-30	Argus Roger R	President and CEO	Convert↑	COMMON STOCK	2,735	—	—	40,300
2025-11-30	SHOEMAKER LESLIE L	EVP, Chief Sustainability	Convert↑	COMMON STOCK	3,035	—	—	325,846
2025-11-30	BATRACK DAN L	Director, Chairman and CEO	Convert↑	COMMON STOCK	21,255	—	—	335,564
2025-11-30	BURDICK STEVEN M	EVP, CFO	Convert↑	COMMON STOCK	3,682	—	—	153,263
2025-11-30	CARTER BRIAN N	SVP, Corporate Controller	Convert↓ Filing footnotes — RESTRICTED STOCK UNITS (RIGHT TO RECEIVE) (Direct) Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock. The RSUs become vested as to 25% of the shares on November 30, 2025, and 25% annually, thereafter, until fully vested. The RSUs are exercisable at the time of vesting and do not have a set expiration date.	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	1,228	—	—	3,681

Legend Buy — open-market purchase Sell — open-market sale ↑ Shares acquired ↓ Shares disposed (gift, conversion, tax…)

Showing 1–50 of 1,088 transactions

Key facts CIK 831641 CUSIP 88162G103 13F (30d) 293 filings 289 filers Visit website Investor relations