Tetra Tech, Inc. (TTEK) Insider Trading

Last 12 months

Insiders bought $50k and sold $401k on the open market.

None of the selling was scheduled in advance under a 10b5-1 plan. SVP, Corporate Controller Brian N Carter sold $401k on Feb 4, 18% of their stake, outside a plan.

Net open-market

−$351k

1 buy · 1 sale

Under a 10b5-1 plan

of the value sold

Insiders who bought / sold

1 / 1

executives and directors

Last open-market buy

May 2026

May 15, 2026

Get an email when TTEK's executives or directors buy, or make a large sale outside a plan.

Trades · last 2 years

Date	Insider	Trade	Shares	Price	Value	Of their stake	Filing
May 15	Jeffrey R Feeler Director	Bought	1,900	$26.41	$50k	New	Form 4
Feb 4	Brian N Carter SVP, Corporate Controller	SoldNo plan	9,979	$40.23	$401k	18%	Form 4
Aug 14, 2025	Gary Birkenbeuel Director	SoldNo plan	2,390	$36.00	$86k	6.0%	Form 4
Feb 4, 2025	Kirsten M Volpi Director	SoldNo plan 3 parts	10,116	$34.33 average	$347k	14%	Form 4

May 15
Jeffrey R Feeler
Director · bought 1,900 at $26.41
$50k
New position
Feb 4No plan
Brian N Carter
SVP, Corporate Controller · sold 9,979 at $40.23
$401k
18% of stake
Aug 14, 2025No plan
Gary Birkenbeuel
Director · sold 2,390 at $36.00
$86k
6.0% of stake
Feb 4, 2025No plan
Kirsten M Volpi
Director · sold 10,116 at avg $34.33
$347k
14% of stake

How to read this. Insiders sell for many reasons: taxes, diversifying, a house. Open-market buys are rarer and say more. A 10b5-1 plan is a trading schedule set up months in advance, so those sales were not timed on news. Large holders (funds and 10% owners) are listed under Everything but not counted as insiders. If you own or watch TTEK, we send a push when an executive buys or makes a large sale outside a plan.

Source: SEC Form 4 filings, filed within two business days of each trade and checked for new ones every hour.

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Spot a number that looks wrong? Check it in TTEK's SEC filings or

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Data sourced from SEC EDGAR filings and third-party price providers. Scores, valuations, and metrics are algorithmic estimates. This is not investment advice. See our Terms and Methodology.

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