Tetra Tech Inc.

Last updated September 27, 2026

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Organization details

Legal name: Tetra Tech Inc.
Ownership: Public
Status: Active
Sector (GICS): Industrials
SIC code: 8711 — Services-Engineering Services
Jurisdiction of incorporation: Delaware
Headquarters city: Pasadena
Headquarters state / province: California
Headquarters country: United States
Fiscal year end: September
Ticker symbol: TTEK
Primary stock exchange: Nasdaq

Identifiers

SEC CIK: 0000831641
EIN: 95-4148514
Wikidata ID: Q7706196

Board of directors

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Christiana Obiaya · Director
Since 2023
Dan L. Batrack · Director · Chairman and CEO
Since 2023
Eric W. Thornburg · Director
Since 2026
Gary Birkenbeuel · Director
Since 2023
J. Kenneth Thompson · Director
Since 2023
Jeffrey R. Feeler · Director
Since 2025
Joanne M. Maguire · Director
Since 2023
John M. Douglas · Director
Since 2024
Kimberly E. Ritrievi · Director
Since 2023
Kirsten M. Volpi · Director
Since 2023
M. Susan Hardwick · Director Overboarded
Since 2025
Prashant Gandhi · Director
Since 2023

Chief executives

Dan L. Batrack · CHAIRMAN AND CEO

Dates unknown

Director election results

Annual meeting of February 19, 2026. Support is votes for as a share of votes for and against (or withheld). Below 80% is a clear protest.

Board connections

6 of this board's directors also sit on 11 other boards. 3 are in the same sector.

Shared director Other board Same sector

Alaska Air Group Inc. Same sector
via J. Kenneth Thompson
American Water Works Company Inc.
via M. Susan Hardwick
Coeur Mining Inc.
via J. Kenneth Thompson
Core & Main Inc. Same sector
via M. Susan Hardwick
Edison International
via M. Susan Hardwick
H2O America
via Eric W. Thornburg
Hudson Technologies Inc. Same sector
via Jeffrey R. Feeler
Mativ Holdings Inc.
via Kimberly E. Ritrievi
NewJersey Resources Corporation
via M. Susan Hardwick
Vistance Networks Inc.
via Joanne M. Maguire
Visteon Corporation
via Joanne M. Maguire

Insider trades

All notable trades →

From SEC Forms 4 and 5. Open-market purchases and sales are highlighted; grants, option exercises and shares withheld for tax are routine.

Bought, last 12 months: $50,179; 1 purchase by 1 insider
Sold, last 12 months: $401,455; 1 sale by 1 insider

Date	Insider	Transaction	Shares	Price	Value
Aug 4, 2026	Kirsten M. Volpi Director	Option exercise	+2,300	$9.59	$22,057
Jun 4, 2026	Kirsten M. Volpi Director	Option exercise	+1,700	$9.59	$16,303
May 15, 2026	Jeffrey R. Feeler Director	Open-market purchase	+1,900	$26.41	$50,179
Mar 16, 2026	Kimberly E. Ritrievi Director	Option exercise	+4,500	—	—
Mar 16, 2026	Kimberly E. Ritrievi Director	Option exercise	+2,250	—	—
Mar 16, 2026	Kimberly E. Ritrievi Director	Option exercise	+1,925	—	—
Mar 16, 2026	Kimberly E. Ritrievi Director	Option exercise	+2,910	—	—
Mar 16, 2026	Kimberly E. Ritrievi Director	Option exercise	+2,050	—	—
Mar 16, 2026	Kimberly E. Ritrievi Director	Option exercise	+795	—	—
Mar 16, 2026	Kimberly E. Ritrievi Director	Option exercise	+795	—	—
Mar 16, 2026	Kimberly E. Ritrievi Director	Option exercise	+1,900	—	—
Mar 16, 2026	Kimberly E. Ritrievi Director	Option exercise	+2,125	—	—
Mar 16, 2026	Kimberly E. Ritrievi Director	Option exercise	+1,718	—	—
Mar 16, 2026	Kimberly E. Ritrievi Director	Grant or award	+25,883	—	—
Feb 19, 2026	Christiana Obiaya Director	Option exercise	+495	—	—

Peers

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Questions about Tetra Tech Inc.

Who is the CEO of Tetra Tech Inc.?

Dan L. Batrack is Tetra Tech Inc.'s CHAIRMAN AND CEO.

How many directors are on Tetra Tech Inc.'s board?

Tetra Tech Inc.'s board has 12 directors: Christiana Obiaya, Dan L. Batrack, Eric W. Thornburg, Gary Birkenbeuel, J. Kenneth Thompson, Jeffrey R. Feeler, Joanne M. Maguire, John M. Douglas, Kimberly E. Ritrievi, Kirsten M. Volpi and 2 others.

Are Tetra Tech Inc. insiders buying or selling shares?

Over the last 12 months, Tetra Tech Inc. insiders bought $50,179 of shares in 1 purchase and sold $401,455 of shares in 1 sale on the open market, as reported to the SEC on Forms 4 and 5.

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