Tetra Tech Inc (TTEK)
Industrials
Engineering & Construction
33.20 $
Closing price · As of: 31. Jul 2026
Who owns Tetra Tech Inc (TTEK)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 99.4% of the shares are freely tradable; institutional investors hold 104.4%.
Ownership Structure
Institutional ownership
Share of the stock held by institutional investors (funds, banks, insurers) according to regulatory filings.
104.4%
Float
Share of stock freely tradable on the market — not locked up in the hands of founders, insiders, or major shareholders.
99.4%
Short % of float
Shares sold short as a percentage of the freely tradable float — high values signal many bets on falling prices.
4.7%
Shares Outstanding
Total number of shares issued. Price times share count gives market cap.
260Mio.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| BlackRock Inc | 10.32 | 26,790,406 | +4.1 | 03/31/2026 |
| Vanguard Group Inc | 9.94 | 25,800,544 | -1.9 | 12/31/2025 |
| Vanguard Portfolio Management, LLC | 4.87 | 12,643,094 | +0.0 | 03/31/2026 |
| Vanguard Capital Management, LLC | 4.51 | 11,709,151 | +0.0 | 03/31/2026 |
| Capital Research & Mgmt Co - Division 3 | 4.39 | 11,385,267 | +26.3 | 03/31/2026 |
| Pictet Asset Manangement SA | 3.72 | 9,644,792 | -13.9 | 03/31/2026 |
| State Street Corp | 3.71 | 9,635,912 | +2.2 | 03/31/2026 |
| Neuberger Berman Group LLC | 2.80 | 7,269,657 | -13.0 | 03/31/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| iShares Core S&P Mid-Cap ETF | 3.41 | 8,858,012 | +0.0 | 05/29/2026 |
| Vanguard Total Stock Mkt Idx Inv | 3.21 | 8,324,262 | +0.3 | 04/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Data as of: July 31, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.