Ranked by reported Q2 2026 13F market value
Share of total reported institutional value in TTEK held by the largest 10 / 25 filers.
| # | Institution | Shares Held | Market Value | QoQ Change | Ownership % | % of Fund |
|---|---|---|---|---|---|---|
| 1 | BlackRock, Inc. | 28.7M | $828.4M | +7.0% | 11.049% | 0.01% |
| 2 | VANGUARD PORTFOLIO MANAGEMENT LLC | 12.5M | $360.2M | -1.4% | 4.804% | 0.02% |
| 3 | VANGUARD CAPITAL MANAGEMENT LLC | 11.7M | $338.8M | +0.1% | 4.518% | 0.01% |
| 4 | Capital International Investors | 11.7M | $336.6M | +2.3% | 4.489% | 0.07% |
| 5 | STATE STREET CORP | 9.8M | $282.0M | +1.3% | 3.761% | 0.00% |
| 6 | FMR LLC | 8.8M | $253.3M | +2571.3% | 3.379% | 0.01% |
| 7 | GEODE CAPITAL MANAGEMENT, LLC | 6.8M | $197.4M | +31.0% | 2.633% | 0.01% |
| 8 | FIL Ltd | 5.5M | $158.1M | +13.2% | 2.108% | 0.11% |
| 9 | Amundi | 5.1M | $147.3M | +7.3% | 1.965% | 0.04% |
| 10 | FULLER & THALER ASSET MANAGEMENT, INC. | 4.9M | $142.2M | +48.5% | 1.896% | 0.39% |
| 11 | Pictet Asset Management Holding SA | 4.8M | $137.5M | -50.6% | 1.834% | 0.13% |
| 12 | WELLINGTON MANAGEMENT GROUP LLP | 4.7M | $135.0M | -2.7% | 1.801% | 0.02% |
| 13 | DIMENSIONAL FUND ADVISORS LP | 4.4M | $128.5M | +17.3% | 1.713% | 0.02% |
| 14 | Neuberger Berman Group LLC | 4.4M | $127.4M | -39.4% | 1.699% | 0.04% |
| 15 | ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | 4.4M | $126.9M | +708.5% | 1.693% | 0.06% |
| 16 | Invesco Ltd. | 4.1M | $118.9M | +40.3% | 1.586% | 0.01% |
| 17 | AQR CAPITAL MANAGEMENT LLC | 4.1M | $117.1M | +171.5% | 1.584% | 0.04% |
| 18 | Impax Asset Management Group plc | 3.9M | $113.6M | +2.6% | 1.515% | 0.74% |
| 19 | LGT Group Foundation | 3.7M | $108.2M | +18.4% | 1.443% | 1.22% |
| 20 | NORGES BANK | 3.2M | $93.3M | — | 1.245% | 0.01% |
| 21 | Robeco Schweiz AG | 3.1M | $89.5M | +35.5% | 1.194% | 1.44% |
| 22 | M&G Plc | 2.8M | $80.5M | +19.8% | 1.070% | 0.40% |
| 23 | AMERIPRISE FINANCIAL INC | 2.7M | $78.9M | +35.1% | 1.052% | 0.02% |
| 24 | GOLDMAN SACHS GROUP INC | 2.6M | $76.5M | +37.4% | 1.020% | 0.01% |
| 25 | FIRST TRUST ADVISORS LP | 2.6M | $74.0M | +4.8% | 0.987% | 0.04% |
denotes a marquee investor (Buffett, Burry, ARK, Tiger Global, Pershing Square, Baupost and other widely-followed managers). “% of Fund” shows how much of that investor’s total 13F portfolio is invested in TTEK — a direct measure of their conviction.
Filings activity in TTEK during Q2 2026, grouped by how each filer changed its position.
8 quarters of 13F filings · Δ columns show change vs prior quarter
| Quarter | Inst. Holders | Δ Holders | Ownership % | Δ Ownership | Total 13F Value | Δ Value |
|---|---|---|---|---|---|---|
| Q2 2026 | 548 | 5.8% | 97.78% | +5.19 pp | $7.03B | +0.0% |
| Q1 2026 | 582 | 3.2% | 92.59% | +1.27 pp | $7.03B | 8.8% |
| Q4 2025 | 601 | +3.4% | 91.32% | 1.87 pp | $7.71B | 1.9% |
| Q3 2025 | 581 | +1.0% | 93.19% | 1.30 pp | $7.86B | 8.0% |
| Q2 2025 | 575 | +4.2% | 94.49% | +4.08 pp | $8.54B | +25% |
| Q1 2025 | 552 | 11% | 90.41% | +3.28 pp | $6.84B | 23% |
| Q4 2024 | 619 | 1.6% | 87.13% | +0.71 pp | $8.86B | 21% |
| Q3 2024 | 629 | — | 86.42% | — | $11.27B | — |
Source: SEC 13F institutional filings. Ownership % requires market cap data and will show once linked. Δ columns compare to the immediately prior filed quarter.
Quick answers to the most common questions about buying TTEK stock.
Based on Q2 2026 13F filings, institutional ownership of Tetra Tech, Inc. stands at 97.8%, held across 548 reporting institutions.
BlackRock, Inc. is the largest reported institutional holder of TTEK, with approximately 28,675,276 shares worth $0.83B as of Q2 2026.
No marquee "smart money" managers (Berkshire, Burry, ARK, Tiger Global, Pershing Square, Baupost, etc.) currently appear among the top 25 institutional holders of TTEK.
Our composite Smart Money Score for TTEK is 35 out of 100 (Bearish). It combines net institutional buying activity, ownership shift, marquee investor presence, and holder-count growth.
47 institutions opened new positions in TTEK during Q2 2026, while 83 fully exited. 164 added to existing positions and 316 trimmed.
TTEK institutional ownership rose by 5.19 percentage points quarter-over-quarter, with a net change of -34 holders.
The top 10 institutions account for 43.3% of all reported 13F value in TTEK, and the top 25 account for 66.1%.
All data is sourced from SEC Form 13F filings, which institutional investment managers with at least $100M in assets are required to file each quarter. We process every 13F filing from EDGAR and recompute the aggregates after each cycle. Insider transactions are sourced from Form 4 filings.
Tetra Tech, Inc. (TTEK) Institutional Ownership