Sutro Biopharma, Inc.
STRO- Exchange
- Nasdaq
- Industry
- Biological Products, (No Diagnostic Substances)
- SEC CIK
- 0001382101
No open-market purchases or sales by Sutro Biopharma, Inc. insiders were filed in the last 90 days; 100 institutions reported holding it in 13F filings for Q2 2026, worth $545.7M in total; no superinvestor holds it.
13F holders, Q1 2026
Institutional positions in Sutro Biopharma, Inc. as of Mar 31, 2026. Investment managers with $100 million or more in US stocks report their long positions on Form 13F within 45 days after each quarter ends. How 13F works
- Institutional holders
- 78
- +17 vs. Q4 2025
- Shares held
- 14.4M
- +9.16M (+175.4%) vs. Q4 2025
- Total value
- $358.3M
- +$297.9M (+492.8%) vs. Q4 2025
- New holders
- 26
- 23 more added
- Sold out
- 9
- 13 more reduced
2 institutions that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q4 2025: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting STRO on Form 13F each quarter since Q1 2021, and the total value they reported. Values are as of each quarter end, so they also move with the share price.
| Quarter | Holders | Value |
|---|---|---|
| Q2 2026 | 100 | $545.7M |
| Q1 2026 | 78 | $358.9M |
| Q4 2025 | 63 | $65.0M |
| Q3 2025 | 88 | $46.4M |
| Q2 2025 | 101 | $39.8M |
| Q1 2025 | 113 | $40.0M |
| Q4 2024 | 123 | $117.6M |
| Q3 2024 | 130 | $216.6M |
| Q2 2024 | 119 | $185.2M |
| Q1 2024 | 117 | $308.2M |
| Q4 2023 | 114 | $240.0M |
| Q3 2023 | 109 | $194.3M |
| Q2 2023 | 120 | $251.6M |
| Q1 2023 | 116 | $247.9M |
| Q4 2022 | 119 | $403.7M |
| Q3 2022 | 113 | $286.6M |
| Q2 2022 | 115 | $240.9M |
| Q1 2022 | 114 | $342.2M |
| Q4 2021 | 117 | $599.0M |
| Q3 2021 | 120 | $752.5M |
| Q2 2021 | 124 | $766.7M |
| Q1 2021 | 138 | $1.01B |
Institutions, Q1 2026
Shares, value and share of portfolio for each institution holding Sutro Biopharma, Inc.; share changes are against Q4 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| BVF Inc | 1,251,788 | $31.2M | 0.99% | +1,251,788 | New |
| Affinity Asset Advisors, LLC | 1,069,519 | $26.6M | 1.56% | +321,137+42.9% | Added |
| Samsara BioCapital, LLC | 1,062,872 | $26.5M | 2.57% | +858,369+419.7% | Added |
| Kynam Capital Management, LP | 872,558 | $21.7M | 1.38% | +392,968+81.9% | Added |
| OrbiMed Advisors LLC | 801,144 | $20.0M | 0.44% | +801,144 | New |
| Vanguard Capital Management LLC | 720,442 | $17.9M | 0.00% | +720,442 | New |
| Perceptive Advisors LLC | 715,307 | $17.8M | 0.35% | +715,307 | New |
| Ra Capital Management, L.P. | 715,307 | $17.8M | 0.19% | +715,307 | New |
| Eventide Asset Management, LLC | 715,307 | $17.8M | 0.29% | +715,307 | New |
| Point72 Asset Management, L.P. | 692,111 | $17.2M | 0.03% | +513,023+286.5% | Added |
| ADAR1 Capital Management, LLC | 524,441 | $13.1M | 0.79% | +457,364+681.8% | Added |
| Velan Capital Investment Management LP | 512,160 | $12.8M | 7.99% | +200,160+64.2% | Added |
| Balyasny Asset Management LLC | 465,792 | $11.6M | 0.02% | +235,743+102.5% | Added |
| Woodline Partners LP | 457,441 | $11.4M | 0.04% | +457,441 | New |
| UBS Group AG | 392,871 | $9.79M | 0.00% | +385,001+4,892.0% | Added |
| Acadian Asset Management LLC | 335,813 | $8.36M | 0.01% | −2,140−0.6% | Reduced |
| Merck & Co., Inc. | 272,351 | $6.78M | 1.94% | 00.0% | Unchanged |
| Acuta Capital Partners, LLC | 269,425 | $6.71M | 4.77% | +201,974+299.4% | Added |
| BlackRock, Inc. | 232,684 | $5.80M | 0.00% | +115,247+98.1% | Added |
| KVP Capital Advisors, LP | 226,575 | $5.64M | 4.22% | +226,575 | New |
| Marshall Wace, LLP | 222,634 | $5.55M | 0.01% | +137,019+160.0% | Added |
| Millennium Management LLC | 210,378 | $5.24M | 0.00% | −207,818−49.7% | Reduced |
| Adage Capital Partners GP, L.L.C. | 200,000 | $4.98M | 0.01% | 00.0% | Unchanged |
| Opaleye Management Inc. | 190,671 | $4.75M | 0.63% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 171,386 | $4.27M | 0.00% | +87,407+104.1% | Added |
| Citadel Advisors LLC | 117,537 | $2.93M | 0.00% | +85,452+266.3% | Added |
| Renaissance Technologies LLC | 97,824 | $2.44M | 0.00% | −25,041−20.4% | Reduced |
| Vanguard Fiduciary Trust Co | 94,838 | $2.36M | 0.00% | +94,838 | New |
| Susquehanna International Group, LLP | 84,902 | $2.11M | 0.00% | +84,902 | New |
| Eversept Partners, LP | 73,161 | $1.82M | 0.12% | −120,410−62.2% | Reduced |
| Burkehill Global Management, LP | 71,530 | $1.78M | 0.09% | +71,530 | New |
| Two Sigma Investments, LP | 65,176 | $1.62M | 0.00% | +18,684+40.2% | Added |
| State Street Corp | 52,118 | $1.30M | 0.00% | +17,852+52.1% | Added |
| Fisher Asset Management, LLC | 35,295 | $879.2K | 0.00% | −100.0% | Reduced |
| Trexquant Investment LP | 34,343 | $855.5K | 0.01% | +34,343 | New |
| Northern Trust Corp | 33,166 | $826.2K | 0.00% | +18,787+130.7% | Added |
| Jane Street Group, LLC | 27,760 | $691.5K | 0.00% | +4,815+21.0% | Added |
| Goldman Sachs Group Inc | 27,187 | $677.2K | 0.00% | +11,518+73.5% | Added |
| Gsa Capital Partners LLP | 25,822 | $643.0K | 0.04% | −63,245−71.0% | Reduced |
| StemPoint Capital LP | 23,295 | $580.3K | 0.11% | +23,295 | New |
| Bank of America Corp | 18,873 | $470.1K | 0.00% | +14,661+348.1% | Added |
| Citigroup Inc | 18,845 | $469.4K | 0.00% | +17,802+1,706.8% | Added |
| Brevan Howard Capital Management LP | 18,791 | $468.1K | 0.00% | +18,791 | New |
| AJU IB Investment Co., Ltd. | 17,500 | $435.9K | 1.43% | 00.0% | Unchanged |
| Invesco Ltd. | 17,165 | $427.6K | 0.00% | +195+1.1% | Added |
| RBF Capital, LLC | 15,272 | $380.4K | 0.02% | 00.0% | Unchanged |
| Hudson Bay Capital Management LP | 14,768 | $367.9K | 0.00% | +14,768 | New |
| Sigma Planning Corp | 12,520 | $311.9K | 0.01% | +12,520 | New |
| Jump Financial, LLC | 12,385 | $308.5K | 0.00% | +12,385 | New |
| Charles Schwab Investment Management Inc | 10,577 | $263.5K | 0.00% | +10,577 | New |
| Morgan Stanley | 10,529 | $262.3K | 0.00% | −5,393−33.9% | Reduced |
| Omers Administration Corp | 8,700 | $216.7K | 0.00% | −2,323−21.1% | Reduced |
| AQR Capital Management LLC | 8,605 | $214.4K | 0.00% | −9,429−52.3% | Reduced |
| XTX Topco Ltd | 8,203 | $204.3K | 0.00% | +8,203 | New |
| Persistent Asset Partners Ltd | 7,411 | $184.6K | 0.07% | +7,411 | New |
| State of Tennessee, Treasury Department | 7,400 | $184.3K | 0.00% | 00.0% | Unchanged |
| Vanguard Global Advisers, LLC | 7,182 | $178.9K | 0.00% | +7,182 | New |
| Advisor Group Holdings, Inc. | 1,280 | $31.9K | 0.00% | −58−4.3% | Reduced |
| FMR LLC | 1,050 | $26.2K | 0.00% | −58−5.2% | Reduced |
| CWM, LLC | 983 | $24.5K | 0.00% | −516−34.4% | Reduced |
| FNY Investment Advisers, LLC | 1,000 | $24.0K | 0.01% | 00.0% | Unchanged |
| Owl Creek Wealth Partners LLC | 491 | $12.2K | 0.00% | +491 | New |
| UMA Financial Services, Inc. | 182 | $4.53K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 139 | $3.46K | 0.00% | +139 | New |
| BNP Paribas Arbitrage, SA | 111 | $2.77K | 0.00% | 00.0% | Unchanged |
| The PNC Financial Services Group, Inc. | 62 | $1.54K | 0.00% | 00.0% | Unchanged |
| Simplex Trading, LLC | 62 | $1.54K | 0.00% | +62 | New |
| Fortitude Family Office, LLC | 56 | $1.40K | 0.00% | 00.0% | Unchanged |
| Bogart Wealth, LLC | 50 | $1.25K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 47 | $1.17K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 44 | $1.10K | 0.00% | 00.0% | Unchanged |
| Avion Wealth | 72 | $1.00K | 0.00% | 00.0% | Unchanged |
| HighMark Wealth Management LLC | 23 | $572 | 0.00% | 00.0% | Unchanged |
| EverSource Wealth Advisors, LLC | 19 | $473 | 0.00% | −12−38.7% | Reduced |
| Advisory Services Network, LLC | 15 | $374 | 0.00% | +15 | New |
| SRS Capital Advisors, Inc. | 41 | $75 | 0.00% | +38+1,266.7% | Added |
| Fifth Third Bancorp | 2 | $50 | 0.00% | +2 | New |
| Royal Bank of Canada | 12 | $0 | 0.00% | +1+9.1% | Added |
| Vestal Point Capital, LP | 0 | $0 | 0.00% | −243,000−100.0% | Sold out |
| Tang Capital Management LLC | 0 | $0 | 0.00% | −139,617−100.0% | Sold out |
| Spruce Street Capital LP | 0 | $0 | 0.00% | −75,594−100.0% | Sold out |
| Shay Capital LLC | 0 | $0 | 0.00% | −24,255−100.0% | Sold out |
| Two Sigma Advisers, LP | 0 | $0 | 0.00% | −17,580−100.0% | Sold out |
| JPMorgan Chase & Co | 0 | $0 | 0.00% | −741−100.0% | Sold out |
| Wells Fargo & Company | 0 | $0 | 0.00% | −100−100.0% | Sold out |
| Essential Partners LLC | 0 | $0 | 0.00% | −4−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −2−100.0% | Sold out |
| Vanguard Group Inc | – | – | – | – | Not filed |
| Comerica Bank | – | – | – | – | Not filed |