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Filing Details

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
831641	Tetra Tech Inc	TTEK	Services-Engineering Services (8711)	954148514

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1206709	L Craig Christensen	3475 East Foothill Boulevard Pasadena, CA 91107	Svp, Cio	No	Yes	No	No

Reported Non-Derivative Transactions

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership
Common Stock	Disposition	2018-11-14	1,500	$64.95	34,400	No	4	G	Direct
Common Stock	Acquisiton	2018-11-14	6,750	$22.53	41,150	No	4	M	Direct
Common Stock	Disposition	2018-11-14	4,371	$66.31	36,779	No	4	S	Direct
Common Stock	Disposition	2018-11-14	2,379	$65.36	34,400	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
No	4	G	Direct
No	4	M	Direct
No	4	S	Direct
No	4	S	Direct

Reported Derivative Transactions

Sec. Name	Sec. Type	Acquisiton - Disposition	Date	Amount	Price	Amount - 2	Price - 2
Common Stock	EMPLOYEE STOCK OPTION (RIGHT TO BUY)	Disposition	2018-11-14	6,750	$0.00	6,750	$22.53
Common Stock	RESTRICTED STOCK UNITS (RIGHT TO RECEIVE)	Acquisiton	2018-11-15	2,156	$0.00	2,156	$0.00

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
10,000	2012-11-11	2019-11-11	No	4	M	Direct
2,156	2019-11-18	2022-11-18	No	4	A	Direct

Footnotes

Bona fide gift. No compensation was given to the donor for the gifting of shares.
The closing trading price of the common stock on the date of the gift was $64.95 per share.
$66.314 is an average price. Shares were sold at prices ranging from $66.20 to $66.585 per share.
$65.3567 is an average price. Shares were sold at prices ranging from $65.30 to $65.40 per share.
The option was granted on November 11, 2011 and became exercisable as to 25% of the underlying shares on each anniversary date of the grant.
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 restricted stock units (RSUs) become vested as to 25% of the shares underlying the RSUs on November 18, 2019, and on each anniversary of that date until the RSUs are fully vested.