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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	Acquisiton	2019-01-10	3,400	$22.53	40,841	No	4	M	Direct
Common Stock	Disposition	2019-01-10	3,400	$52.75	37,441	No	4	S	Direct
Common Stock	Disposition	2019-01-10	625	$53.00	36,816	No	4	S	Direct

Equity Swap Involved	Form Type	Code	Nature of Ownership
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	2019-01-10	3,400	$22.53	3,400	$22.53

Remaning Holdings	Exercise Date	Expiration Date	Equity Swap Involved	Transaction Form Type	Transaction Code	Nature of Ownership
6,600	2012-11-11	2019-11-11	No	4	M	Direct

Footnotes

Amount of securities beneficially owned have been updated to reflect the acquisition of 51 shares of common stock pursuant to the Tetra Tech, Inc. Employee Stock Purchase Plan (ESPP) on December 14, 2018.
Pursuant to a 10b5-1 automatic trading plan.
$52.7474 is an average price. Shares were sold at prices ranging from $52.40 to $53.02 per share.
All shares sold at an exact price.
The option became exercisable as to 25% of the shares on each anniversary of the grant date.
The option expires in the current year.