Tetra Tech market cap TTEK

Share price times shares outstanding: what the whole company sells for, since 2010.

Tetra Tech is worth $9.5B at the close on Oct 23, 2026, at $36.98 a share.

That is up 7% over the last year and down 0% over five years.

Its highest close in our data was $13.2B in Oct 2024.

Market cap over time

Year	End of year	Low	High	Change
2026 so far	$9.5B	$6.8B	$10.8B	+7%
2025	$8.9B	$7.8B	$11.4B	−17%
2024	$10.7B	$8.6B	$13.2B	+20%
2023	$8.9B	$7.1B	$9.1B	+16%
2022	$7.7B	$6.5B	$9.1B	−16%
2021	$9.1B	$6.3B	$10.2B	+47%
2020	$6.2B	$3.7B	$6.6B	+32%
2019	$4.7B	$2.8B	$4.9B	+66%
2018	$2.8B	$2.5B	$4B	+6%
2017	$2.7B	$2.3B	$2.8B	+9%
2016	$2.5B	$1.4B	$2.5B	+60%
2015	$1.5B	$1.4B	$1.7B	−9%
2014	$1.7B	$1.6B	$2B	−7%
2013	$1.8B	$1.4B	$2B	+8%
2012	$1.7B	$1.4B	$1.8B	+24%
2011	$1.4B	$1.1B	$1.5B	−13%
2010	$1.5B	$1.2B	$1.6B	n/a

Companies in Engineering & Construction nearest Tetra Tech's size, closest first, today.

Company	Market cap
TTEKTetra Tech	$9.5B
IESCIES	$8.5B
STRLSterling Infrastructure	$10.9B
ACMAecom	$7.8B
DYDycom Industries	$6.8B
MTZMasTec	$13.7B
JJacobs Solutions	$17B
KBRKBR	$4.9B
ROADConstruction Partners	$4.7B
AGXArgan	$4.6B
VSECVSE	$4B
Peer median	$7.3B