TTEK

SEC source: 0000831641-24-000076 · wk-form4_1732142240.xml · derivative · entry 7

Hopson Preston III · CIK 0001728969 · EVP, Chief Legal/Human Capital

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,070

Underlying: COMMON STOCK · 2,535 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F8 · derivative.underlying_shares: On September 6, 2024, the balance of 1,521 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 6,084 shares of common stock.

SEC source: 0000831641-24-000076 · wk-form4_1732142240.xml · derivative · entry 6

Hopson Preston III · CIK 0001728969 · EVP, Chief Legal/Human Capital

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,055

Underlying: COMMON STOCK · 2,055 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F7 · derivative.underlying_shares: On September 6, 2024, the balance of 822 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 3,288 shares of common stock.

SEC source: 0000831641-24-000076 · wk-form4_1732142240.xml · derivative · entry 5

Hopson Preston III · CIK 0001728969 · EVP, Chief Legal/Human Capital

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: COMMON STOCK · 3,070 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F6 · derivative.underlying_shares: On September 6, 2024, the balance of 614 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 2,456 shares of common stock.

SEC source: 0000831641-24-000076 · wk-form4_1732142240.xml · nonDerivative · entry 4

Hopson Preston III · CIK 0001728969 · EVP, Chief Legal/Human Capital

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,354

F2 · shares: Represents the shares underlying restricted stock units (RSUs) withheld to pay the related tax liability.

SEC source: 0000831641-24-000076 · wk-form4_1732142240.xml · nonDerivative · entry 3

Hopson Preston III · CIK 0001728969 · EVP, Chief Legal/Human Capital

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 51,370

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000076 · wk-form4_1732142240.xml · nonDerivative · entry 2

Hopson Preston III · CIK 0001728969 · EVP, Chief Legal/Human Capital

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 48,835

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000076 · wk-form4_1732142240.xml · nonDerivative · entry 1

Hopson Preston III · CIK 0001728969 · EVP, Chief Legal/Human Capital

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 46,780

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: On September 6, 2024, the balance of 8,742 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 34,968 shares of common stock.

SEC source: 0000831641-24-000075 · wk-form4_1732142217.xml · derivative · entry 7

SHOEMAKER LESLIE L · CIK 0001450067 · EVP, Chief Sustainability

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,335

Underlying: COMMON STOCK · 3,170 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · security: Represents an award RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F3 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F4 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F7 · derivative.underlying_shares: On September 6, 2024, the balance of 1,901 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 7,604 shares of common stock.

SEC source: 0000831641-24-000075 · wk-form4_1732142217.xml · derivative · entry 6

SHOEMAKER LESLIE L · CIK 0001450067 · EVP, Chief Sustainability

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,520

Underlying: COMMON STOCK · 2,520 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · security: Represents an award RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F3 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F4 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F6 · derivative.underlying_shares: On September 6, 2024, the balance of 1,008 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 4,032 shares of common stock.

SEC source: 0000831641-24-000075 · wk-form4_1732142217.xml · derivative · entry 5

SHOEMAKER LESLIE L · CIK 0001450067 · EVP, Chief Sustainability

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: COMMON STOCK · 3,685 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · security: Represents an award RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F3 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F4 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F5 · derivative.underlying_shares: On September 6, 2024, the balance of 737 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 2,948 shares of common stock.

SEC source: 0000831641-24-000075 · wk-form4_1732142217.xml · nonDerivative · entry 4

SHOEMAKER LESLIE L · CIK 0001450067 · EVP, Chief Sustainability

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 300,224

F1 · shares: Represents the shares underlying restricted stock units (RSUs) withheld to pay the related tax liability.

SEC source: 0000831641-24-000075 · wk-form4_1732142217.xml · nonDerivative · entry 3

SHOEMAKER LESLIE L · CIK 0001450067 · EVP, Chief Sustainability

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 305,390

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000075 · wk-form4_1732142217.xml · nonDerivative · entry 2

SHOEMAKER LESLIE L · CIK 0001450067 · EVP, Chief Sustainability

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 302,220

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000075 · wk-form4_1732142217.xml · nonDerivative · entry 1

SHOEMAKER LESLIE L · CIK 0001450067 · EVP, Chief Sustainability

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 299,700

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000071 · wk-form4_1732141961.xml · derivative · entry 7

CARTER BRIAN N · CIK 0001561742 · SVP, Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,530

Underlying: COMMON STOCK · 1,270 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F8 · derivative.underlying_shares: On September 6, 2024, the balance of 760 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 3,040 shares of common stock.

SEC source: 0000831641-24-000071 · wk-form4_1732141961.xml · derivative · entry 6

CARTER BRIAN N · CIK 0001561742 · SVP, Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 995

Underlying: COMMON STOCK · 995 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F7 · derivative.underlying_shares: On September 6, 2024, the balance of 398 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,592 shares of common stock.

SEC source: 0000831641-24-000071 · wk-form4_1732141961.xml · derivative · entry 5

CARTER BRIAN N · CIK 0001561742 · SVP, Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: COMMON STOCK · 1,535 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F6 · derivative.underlying_shares: On September 6, 2024, the balance of 307 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,228 shares of common stock.

SEC source: 0000831641-24-000071 · wk-form4_1732141961.xml · nonDerivative · entry 4

CARTER BRIAN N · CIK 0001561742 · SVP, Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,530

F2 · shares: Represents the shares underlying restricted stock units (RSUs) withheld to pay the related tax liability.

SEC source: 0000831641-24-000071 · wk-form4_1732141961.xml · nonDerivative · entry 3

CARTER BRIAN N · CIK 0001561742 · SVP, Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 45,600

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000071 · wk-form4_1732141961.xml · nonDerivative · entry 2

CARTER BRIAN N · CIK 0001561742 · SVP, Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 44,330

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000071 · wk-form4_1732141961.xml · nonDerivative · entry 1

CARTER BRIAN N · CIK 0001561742 · SVP, Corporate Controller

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 43,335

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: On September 6, 2024, the balance of 8,360 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 33,440 shares of common stock.

SEC source: 0000831641-24-000069 · wk-form4_1732141847.xml · derivative · entry 7

BURDICK STEVEN M · CIK 0001277150 · EVP, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 6,335

Underlying: COMMON STOCK · 3,170 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · security: Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F3 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F4 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F7 · derivative.underlying_shares: On September 6, 2024, the balance of 1,901 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 7,604 shares of common stock.

SEC source: 0000831641-24-000069 · wk-form4_1732141847.xml · derivative · entry 6

BURDICK STEVEN M · CIK 0001277150 · EVP, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,520

Underlying: COMMON STOCK · 2,520 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · security: Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F3 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F4 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F6 · derivative.underlying_shares: On September 6, 2024, the balance of 1,008 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 4,032 shares of common stock.

SEC source: 0000831641-24-000069 · wk-form4_1732141847.xml · derivative · entry 5

BURDICK STEVEN M · CIK 0001277150 · EVP, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: COMMON STOCK · 3,685 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · security: Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F3 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F4 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F5 · derivative.underlying_shares: On September 6, 2024, the balance of 737 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 2,948 shares of common stock.

SEC source: 0000831641-24-000069 · wk-form4_1732141847.xml · nonDerivative · entry 4

BURDICK STEVEN M · CIK 0001277150 · EVP, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 116,829

F1 · shares: Represents the shares underlying restricted stock units (RSUs) withheld to pay the related tax liability.

SEC source: 0000831641-24-000069 · wk-form4_1732141847.xml · nonDerivative · entry 3

BURDICK STEVEN M · CIK 0001277150 · EVP, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 121,995

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000069 · wk-form4_1732141847.xml · nonDerivative · entry 2

BURDICK STEVEN M · CIK 0001277150 · EVP, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 118,825

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000069 · wk-form4_1732141847.xml · nonDerivative · entry 1

BURDICK STEVEN M · CIK 0001277150 · EVP, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 116,305

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000067 · wk-form4_1732141721.xml · derivative · entry 7

BATRACK DAN L · CIK 0001207854 · Director · Chairman, CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 38,025

Underlying: COMMON STOCK · 19,015 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F8 · derivative.underlying_shares: On September 6, 2024, the balance of 11,408 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 45,632 shares of common stock.

SEC source: 0000831641-24-000067 · wk-form4_1732141721.xml · derivative · entry 6

BATRACK DAN L · CIK 0001207854 · Director · Chairman, CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,030

Underlying: COMMON STOCK · 14,030 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F7 · derivative.underlying_shares: On September 6, 2024, the balance of 5,612 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 22,448 shares of common stock.

SEC source: 0000831641-24-000067 · wk-form4_1732141721.xml · derivative · entry 5

BATRACK DAN L · CIK 0001207854 · Director · Chairman, CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: COMMON STOCK · 16,390 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F6 · derivative.underlying_shares: On September 6, 2024, the balance of 3,278 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 13,112 shares of common stock.

SEC source: 0000831641-24-000067 · wk-form4_1732141721.xml · nonDerivative · entry 4

BATRACK DAN L · CIK 0001207854 · Director · Chairman, CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,590

F2 · shares: Represents the shares underlying restricted stock units (RSUs) withheld to pay the related tax liability.

F1 · balance_after: On September 6, 2024, the balance of 24,877 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 99,508 shares of common stock.

SEC source: 0000831641-24-000067 · wk-form4_1732141721.xml · nonDerivative · entry 3

BATRACK DAN L · CIK 0001207854 · Director · Chairman, CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 173,820

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000067 · wk-form4_1732141721.xml · nonDerivative · entry 2

BATRACK DAN L · CIK 0001207854 · Director · Chairman, CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 154,805

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000067 · wk-form4_1732141721.xml · nonDerivative · entry 1

BATRACK DAN L · CIK 0001207854 · Director · Chairman, CEO and President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 140,775

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: On September 6, 2024, the balance of 24,877 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 99,508 shares of common stock.

SEC source: 0000831641-24-000065 · wk-form4_1732141513.xml · derivative · entry 7

Argus Roger R · CIK 0001721930 · President, Commer/Int'l Group

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,070

Underlying: COMMON STOCK · 2,535 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date

F8 · derivative.underlying_shares: On September 6, 2024, the balance of 1,521 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 6,084 shares of common stock.

SEC source: 0000831641-24-000065 · wk-form4_1732141513.xml · derivative · entry 6

Argus Roger R · CIK 0001721930 · President, Commer/Int'l Group

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,055

Underlying: COMMON STOCK · 2,055 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date

F7 · derivative.underlying_shares: On September 6, 2024, the balance of 822 shares was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 3,288 shares of common stock.

SEC source: 0000831641-24-000065 · wk-form4_1732141513.xml · derivative · entry 5

Argus Roger R · CIK 0001721930 · President, Commer/Int'l Group

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: COMMON STOCK · 2,865 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · security: Represents an award of RSUs, each unit of which represents a contingent right to receive one share of Tetra Tech common stock.

F4 · derivative.exercise_date: The RSUs become vested as to 25% of the shares on the first anniversary date, and 25% of the shares on each anniversary date thereafter until fully vested.

F5 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date

F6 · derivative.underlying_shares: On September 6, 2024, the balance of 573 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 2,292 shares of common stock.

SEC source: 0000831641-24-000065 · wk-form4_1732141513.xml · nonDerivative · entry 4

Argus Roger R · CIK 0001721930 · President, Commer/Int'l Group

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,117

F2 · shares: Represents the shares underlying restricted stock units (RSUs) withheld to pay the related tax liability.

SEC source: 0000831641-24-000065 · wk-form4_1732141513.xml · nonDerivative · entry 3

Argus Roger R · CIK 0001721930 · President, Commer/Int'l Group

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 18,225

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000065 · wk-form4_1732141513.xml · nonDerivative · entry 2

Argus Roger R · CIK 0001721930 · President, Commer/Int'l Group

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,690

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0000831641-24-000065 · wk-form4_1732141513.xml · nonDerivative · entry 1

Argus Roger R · CIK 0001721930 · President, Commer/Int'l Group

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,635

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: On September 6, 2024, the balance of 2,154 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 8,616 shares of common stock. The balance of 2,154 shares also includes 35 shares of common stock that were acquired by the Reporting Person on December 15, 2023, pursuant to the Tetra Tech, Inc. Employee Stock Purchase Plan (ESPP).

SEC source: 0000831641-24-000058 · wk-form4_1727902543.xml · derivative · entry 2

Maguire Joanne M · CIK 0001368472 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: COMMON STOCK · 2,125 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · security: 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.

F3 · derivative.exercise_date: Vesting of the RSUs that was initially scheduled for November 30, 2024, was accelerated on the Reporting Person's retirement from the Issuer's board of directors.

F4 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

F5 · derivative.underlying_shares: On September 6, 2024, the balance of 425 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 1,700 shares of common stock.

SEC source: 0000831641-24-000058 · wk-form4_1727902543.xml · nonDerivative · entry 1

Maguire Joanne M · CIK 0001368472 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 97,785

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · balance_after: On September 6, 2024, the balance of 19,132 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 76,528 shares of common stock.

SEC source: 0000831641-24-000060 · wk-form4_1727902756.xml · derivative · entry 1

Douglas John M. · CIK 0002039540 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 614

Underlying: COMMON STOCK · 614 shares

Expires not disclosed

F1 · derivative.exercise_date: The RSUs become 100% vested as to the shares underlying the RSUs on the first anniversary date of the award.

F2 · derivative.expiration_date: The RSUs are exercisable at the time of vesting and do not have a set expiration date.

SEC source: 0000831641-24-000054 · wk-form4_1726182225.xml · nonDerivative · entry 1

BURDICK STEVEN M · CIK 0001277150 · EVP, CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 112,620

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $46.54 to $46.74, inclusive.

F2 · balance_after: On September 6, 2024, the balance of 29,890 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 119,560 shares of common stock.

SEC source: 0000831641-24-000052 · wk-form4_1726181744.xml · nonDerivative · entry 1

Ritrievi Kimberly E · CIK 0001592089 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,200

F1 · price: All shares sold at an exact price.

F2 · balance_after: On September 6, 2024, the balance of 29,940 shares of common stock was updated pursuant to a 5 to 1 forward stock split, resulting in an additional 119,760 shares of common stock.

SEC source: 0000831641-24-000050 · wk-form4_1726181406.xml · nonDerivative · entry 1

SHOEMAKER LESLIE L · CIK 0001450067 · EVP, Chief Sustainability

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 296,015

F1 · price: The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $45.88 to $46.41, inclusive.

F2 · balance_after: On September 6, 2024, the balance of 74,887 shares of common stock was updated pursuant to a forward 5 to 1 stock split, resulting in an additional 299,548 shares of common stock.

SEC source: 0000831641-24-000048 · wk-form4_1726181275.xml · nonDerivative · entry 1

Volpi Kirsten M · CIK 0001582882 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,790

F1 · price: All shares sold at an exact price.

F2 · balance_after: On September 6, 2024, the balance of 13,148 shares of common stock was updated pursuant to a forward 5 to 1 stock split, resulting in an additional 52,592 shares of common stock.

SEC source: 0000831641-24-000046 · wk-form4_1724359795.xml · derivative · entry 3

Birkenbeuel Gary · CIK 0001748476 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: COMMON STOCK · 243 shares

Expires 2028-07-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F1 · derivative.exercise_date: The option becomes exercisable as to 100% of the shares on the first anniversary of the grant date.