TTEK in the 13F filings

Tetra Tech Inc New · CUSIP 88162G103

Quarter

Q3 2026 · early filers Q2 2026 Q1 2026 Q4 2025 Q3 2025 Q2 2025 Q1 2025 Q4 2024 Q3 2024 Q2 2024 Q1 2024 Q4 2023

Quarter end: 30 Jun 2026; the date the book describes
Filed: 27 Oct 2026; latest of these filings; the earliest 6 Aug 2026
Managers listing it: 28; at least, of 95 tracked, among listed positions
Comparable managers: 91; filed both Q1 2026 and Q2 2026; 9 listed it in both
Shares listed: 38,227,490; combined, among listed positions
Reported value: $1.1bn; combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 15 buyers (opened or added shares) and 19 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +8,636,524.

Managers listing TTEK in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

ActionShare of book at least

28 of 28 holders

				Action		Filing
Fidelity (FMR LLC)	8,768,611	$253m	under 0.1%	Added	+8,440,359	13 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP	4,674,089	$135m	under 0.1%	Trimmed	-129,960	14 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC	4,408,987	$127m	0.08%	Trimmed	-2,860,670	27 Oct 2026 (the filing on sec.gov)
Arrowstreet Capital LP	4,393,728	$127m	0.06%	Added	+3,850,262	13 Aug 2026 (the filing on sec.gov)
Invesco Ltd	4,116,893	$119m	under 0.1%	Added	+1,181,993	14 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC	4,111,603	$117m	under 0.1%	Added	+2,597,141	14 Aug 2026 (the filing on sec.gov)
Citadel Advisors LLC	1,287,534	$37m	under 0.1%	Trimmed	-453,377	2 Sep 2026 (the filing on sec.gov)
Capital Research Global Investors	1,020,653	$29m	under 0.1%	Trimmed	-81,797	12 Aug 2026 (the filing on sec.gov)
Point72 Asset Management LP	1,011,149	$29m	under 0.1%	Added	+468,882	14 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc	767,634	$22m	under 0.1%	Added	+183,172	14 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC	641,945	$19m	under 0.1%	Added	+224,602	14 Aug 2026 (the filing on sec.gov)
Bridgewater Associates LP	608,211	$18m	0.07%	Added	+394,266	14 Aug 2026 (the filing on sec.gov)
Balyasny Asset Management LLC	456,640	$13m	under 0.1%	Added	+22,169	14 Aug 2026 (the filing on sec.gov)
Voloridge Investment Management LLC	419,712	$12m	0.05%	Added	+63,892	14 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP	335,361	$10m	under 0.1%	Trimmed	-2,472,104	14 Aug 2026 (the filing on sec.gov)
Man Group PLC	279,108	$8.1m	under 0.1%	Added	+61,563	14 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd	231,029	$6.7m	under 0.1%	Trimmed	-798,824	14 Aug 2026 (the filing on sec.gov)
Holocene Advisors LP	162,164	$4.7m	under 0.1%	New	new	14 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP	154,365	$4.5m	under 0.1%	Trimmed	-29,400	14 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP	135,137	$3.9m	under 0.1%	Trimmed	-25,099	14 Aug 2026 (the filing on sec.gov)
Freestone Grove Partners LP	101,174	$2.9m	under 0.1%	Added	+49,821	14 Aug 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP	47,505	$1.4m	under 0.1%	Added	+38,001	14 Aug 2026 (the filing on sec.gov)
Marshall Wace LLP	35,094	$1.0m	under 0.1%	Trimmed	-684,524	13 Aug 2026 (the filing on sec.gov)
Caxton Associates LLP	29,865	$863k	under 0.1%	Trimmed	-105,948	14 Aug 2026 (the filing on sec.gov)
Millennium Management LLC	11,498	$332k	under 0.1%	Trimmed	-255,075	14 Aug 2026 (the filing on sec.gov)

Page 1 of 2

Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Fidelity (FMR LLC)existing position · 8,768,611 shares now+8,440,359
Arrowstreet Capital LPexisting position · 4,393,728 shares now+3,850,262
AQR Capital Management LLCexisting position · 4,111,603 shares now+2,597,141
Invesco Ltdexisting position · 4,116,893 shares now+1,181,993
Point72 Asset Management LPexisting position · 1,011,149 shares now+468,882

Reductions

Neuberger Berman Group LLCexisting position · 4,408,987 shares now-2,860,670
AllianceBernstein LPexisting position · 335,361 shares now-2,472,104
Janus Henderson Group Ltdexisting position · 231,029 shares now-798,824
Marshall Wace LLPexisting position · 35,094 shares now-684,524
Citadel Advisors LLCexisting position · 1,287,534 shares now-453,377

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (2)

Holocene Advisors LP$4.7m
D. E. Shaw & Co.$239k

Exited (6)

Renaissance Technologies LLCwas $14m
PDT Partners LLCwas $2.3m
Schonfeld Strategic Advisors LLCwas $1.9m
Acadian Asset Management LLCwas $1.7m
Quantbot Technologies LPwas $886k
Winton Group Ltdwas $750k

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.

8 in Q3 2024 to 10 in Q2 2026

Tracked managers listing it, at least.

the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.

TTEK by quarter
Quarter	Holders	Reported value	Buyers	Sellers
Q2 2013	2	$49m	n.a.	n.a.
Q3 2013	1	$55m	n.a.	n.a.
Q4 2013	2	$59m	n.a.	n.a.
Q1 2014	2	$60m	n.a.	n.a.
Q2 2014	1	$53m	n.a.	n.a.
Q3 2014	2	$31m	n.a.	n.a.
Q4 2014	1	$27m	n.a.	n.a.
Q1 2015	2	$16m	n.a.	n.a.
Q2 2015	2	$15m	n.a.	n.a.
Q3 2015	1	$12m	n.a.	n.a.
Q4 2015	3	$42m	n.a.	n.a.
Q1 2016	3	$44m	n.a.	n.a.
Q2 2016	2	$36m	n.a.	n.a.
Q3 2016	2	$34m	n.a.	n.a.
Q4 2016	3	$40m	n.a.	n.a.
Q1 2017	4	$38m	n.a.	n.a.
Q2 2017	2	$42m	n.a.	n.a.
Q3 2017	1	$36m	n.a.	n.a.
Q4 2017	1	$38m	n.a.	n.a.
Q1 2018	1	$36m	n.a.	n.a.
Q2 2018	2	$101m	n.a.	n.a.
Q3 2018	3	$120m	n.a.	n.a.
Q4 2018	6	$86m	n.a.	n.a.
Q1 2019	5	$73m	n.a.	n.a.
Q2 2019	6	$168m	n.a.	n.a.
Q3 2019	5	$222m	n.a.	n.a.
Q4 2019	4	$206m	n.a.	n.a.
Q1 2020	8	$209m	n.a.	n.a.
Q2 2020	4	$214m	n.a.	n.a.
Q3 2020	3	$274m	n.a.	n.a.
Q4 2020	5	$592m	n.a.	n.a.
Q1 2021	4	$575m	n.a.	n.a.
Q2 2021	6	$531m	n.a.	n.a.
Q3 2021	3	$675m	n.a.	n.a.
Q4 2021	3	$753m	n.a.	n.a.
Q1 2022	6	$938m	n.a.	n.a.
Q2 2022	7	$789m	n.a.	n.a.
Q3 2022	10	$738m	n.a.	n.a.
Q4 2022	10	$776m	n.a.	n.a.
Q1 2023	6	$741m	n.a.	n.a.
Q2 2023	5	$796m	n.a.	n.a.
Q3 2023	6	$674m	n.a.	n.a.
Q4 2023	5	$717m	3	2
Q1 2024	4	$801m	3	2
Q2 2024	7	$860m	5	3
Q3 2024 (split)	8	$1.1bn	2	0
Q4 2024	8	$720m	5	4
Q1 2025	10	$494m	8	3
Q2 2025	7	$669m	5	3
Q3 2025	7	$665m	5	2
Q4 2025	9	$660m	22	13
Q1 2026	10	$526m	16	20
Q2 2026	10	$457m	15	19

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

TTEK and V →TTEK and MA →TTEK and MCO →Choose a stock to compare with TTEK →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own TTEK, latest filings →Back to the 13F Explorer →

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