Tetra Tech
TTEK · NASDAQ
$34.96+$0.33 (+0.95%)TodayMarket closed ·
Prev close $34.63
Who owns TTEK
Largest institutional holders, from their latest 13F filings
The 10 largest institutions hold 37.6% of TTEK’s shares.
- BlackRock Institutional Trust Company, N.A.9.2%
- Vanguard Portfolio Management, LLC4.9%
- Vanguard Capital Management, LLC4.6%
- Capital International Investors4.6%
- Next 6 largest institutions14.4%
- All other shareholders62.4%
| Holder | Shares | % of shares |
|---|---|---|
| BlackRock Institutional Trust Company, N.A. | 23.64M | 9.23% |
| Vanguard Portfolio Management, LLC | 12.47M | 4.87% |
| Vanguard Capital Management, LLC | 11.73M | 4.58% |
| Capital International Investors | 11.65M | 4.55% |
| State Street Investment Management (US) | 9.76M | 3.81% |
| Geode Capital Management, L.L.C. | 6.83M | 2.67% |
| Fidelity International | 5.47M | 2.14% |
| Amundi Asset Management, SAS | 5.02M | 1.96% |
| Fuller & Thaler Asset Management Inc. | 4.92M | 1.92% |
| Pictet Asset Management Ltd. | 4.76M | 1.86% |
Largest mutual fund holders
| Holder | Shares | % of shares |
|---|---|---|
| iShares Core S&P Mid-Cap ETF | 9.09M | 3.55% |
| Vanguard Total Stock Market Index Fund | 8.28M | 3.23% |
| Pictet - Water | 6.89M | 2.69% |
| Vanguard Small-Cap Index Fund | 5.97M | 2.33% |
| Fidelity Strategic Advisers Fidelity US Total Stk | 4.12M | 1.61% |
Insider trades
Form 4 filings by officers, directors and large holders
Over the last 6 months, insiders bought $50.18K (1 trade) of TTEK on the open market, with no sales.
| Insider | Type | Shares | Value |
|---|---|---|---|
| Volpi Kirsten M | Option exercise | 2.30K | — |
| Volpi Kirsten M | Option exercise | 2.30K | $22.06K |
| Volpi Kirsten M | Option exercise | 1.70K | — |
| Volpi Kirsten M | Option exercise | 1.70K | $16.30K |
| Feeler Jeffrey R | Buy | 1.90K | $50.18K |
| Thornburg Eric W | Award | 1.26K | — |
Short interest
Settled Sep 30, 2026
- Shares short
- 11.88M
- Days to cover
- 5.07
- % of shares outstanding
- 4.64%
- Average daily volume
- 2.34M
- Change since last report
- +7.1%
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