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Who owns Tetra Tech (TTEK) stock

529 funds reported Tetra Tech (TTEK) shares in their latest 13F filings, worth $8.0B in all. The largest holder is Vanguard Group ($865M). Last quarter 228 funds added to their stakes and 264 cut them.

Largest holders of TTEK (13F)Largest holders of TTEK (13F)Vanguard Group$865MBlackRock$828MVanguard Portfolio Management LLC$360MVanguard Capital Management LLC$339MCapital International Investors$337MState Street$282MFMR LLC$253MGeode Capital Management, LLC$197MFIL$158MFuller & Thaler Asset Management$142M

Largest holders (13F)

FundSharesValueChangeQuarter
Vanguard Group25,800,544$865Mdecrease2025-12-31
BlackRock28,675,276$828Mincrease2026-06-30
Vanguard Portfolio Management LLC12,467,970$360Mdecrease2026-06-30
Vanguard Capital Management LLC11,725,738$339Mincrease2026-06-30
Capital International Investors11,651,238$337Mincrease2026-06-30
State Street9,761,640$282Mincrease2026-06-30
FMR LLC8,768,611$253Mincrease2026-06-30
Geode Capital Management, LLC6,833,071$197Mincrease2026-06-30
FIL5,471,691$158Mincrease2026-06-30
Fuller & Thaler Asset Management4,921,268$142Mincrease2026-06-30
Pictet Asset Management Holding SA4,759,290$137Mdecrease2026-06-30
Amundi4,165,350$137Mdecrease2026-09-30
Wellington Management Group LLP4,674,089$135Mdecrease2026-06-30
Dimensional Fund Advisors LP4,446,215$128Mincrease2026-06-30
Neuberger Berman Group LLC4,408,987$127Mdecrease2026-06-30

Tetra Tech's latest quarter

Tetra Tech, Q3 FY26: revenue $1.3B (-4% year over year), operating margin 12.1%, net earnings $110M, operating cash flow $229M. The chart follows the revenue to costs, profit and cash.

Questions

Who owns the most TTEK stock?

By the latest 13F filings: Vanguard Group ($865M); BlackRock ($828M); Vanguard Portfolio Management LLC ($360M); Vanguard Capital Management LLC ($339M); Capital International Investors ($337M).

What is the short interest in TTEK?

12,771,229 shares were sold short at the 2026-10-15 settlement, 7.53% of the float.

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Updated Nov 8, 2026. Read automatically from SEC filings and public data; errors are possible. Not investment advice.