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 | $358.3M |
| Q4 2025 | 63 | $64.8M |
| Q3 2025 | 88 | $46.4M |
| Q2 2025 | 101 | $39.6M |
| Q1 2025 | 113 | $40.0M |
| Q4 2024 | 123 | $117.6M |
| Q3 2024 | 130 | $216.4M |
| Q2 2024 | 119 | $185.1M |
| Q1 2024 | 117 | $301.7M |
| Q4 2023 | 114 | $238.7M |
| Q3 2023 | 109 | $194.3M |
| Q2 2023 | 120 | $251.6M |
| Q1 2023 | 116 | $247.5M |
| Q4 2022 | 119 | $403.7M |
| Q3 2022 | 113 | $279.6M |
| Q2 2022 | 115 | $240.9M |
| Q1 2022 | 114 | $342.2M |
| Q4 2021 | 117 | $593.2M |
| 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 |
|---|---|---|---|---|---|
| Royal Bank of Canada | 12 | $0 | 0.00% | +1+9.1% | Added |
| Fifth Third Bancorp | 2 | $50 | 0.00% | +2 | New |
| SRS Capital Advisors, Inc. | 41 | $75 | 0.00% | +38+1,266.7% | Added |
| Advisory Services Network, LLC | 15 | $374 | 0.00% | +15 | New |
| EverSource Wealth Advisors, LLC | 19 | $473 | 0.00% | −12−38.7% | Reduced |
| HighMark Wealth Management LLC | 23 | $572 | 0.00% | 00.0% | Unchanged |
| Avion Wealth | 72 | $1.00K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 44 | $1.10K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 47 | $1.17K | 0.00% | 00.0% | Unchanged |
| Bogart Wealth, LLC | 50 | $1.25K | 0.00% | 00.0% | Unchanged |
| Fortitude Family Office, LLC | 56 | $1.40K | 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 |
| BNP Paribas Arbitrage, SA | 111 | $2.77K | 0.00% | 00.0% | Unchanged |
| Barclays PLC | 139 | $3.46K | 0.00% | +139 | New |
| UMA Financial Services, Inc. | 182 | $4.53K | 0.00% | 00.0% | Unchanged |
| Owl Creek Wealth Partners LLC | 491 | $12.2K | 0.00% | +491 | New |
| FNY Investment Advisers, LLC | 1,000 | $24.0K | 0.01% | 00.0% | Unchanged |
| CWM, LLC | 983 | $24.5K | 0.00% | −516−34.4% | Reduced |
| FMR LLC | 1,050 | $26.2K | 0.00% | −58−5.2% | Reduced |
| Advisor Group Holdings, Inc. | 1,280 | $31.9K | 0.00% | −58−4.3% | Reduced |
| Vanguard Global Advisers, LLC | 7,182 | $178.9K | 0.00% | +7,182 | New |
| State of Tennessee, Treasury Department | 7,400 | $184.3K | 0.00% | 00.0% | Unchanged |
| Persistent Asset Partners Ltd | 7,411 | $184.6K | 0.07% | +7,411 | New |
| XTX Topco Ltd | 8,203 | $204.3K | 0.00% | +8,203 | New |
| AQR Capital Management LLC | 8,605 | $214.4K | 0.00% | −9,429−52.3% | Reduced |
| Omers Administration Corp | 8,700 | $216.7K | 0.00% | −2,323−21.1% | Reduced |
| Morgan Stanley | 10,529 | $262.3K | 0.00% | −5,393−33.9% | Reduced |
| Charles Schwab Investment Management Inc | 10,577 | $263.5K | 0.00% | +10,577 | New |
| Jump Financial, LLC | 12,385 | $308.5K | 0.00% | +12,385 | New |
| Sigma Planning Corp | 12,520 | $311.9K | 0.01% | +12,520 | New |
| Hudson Bay Capital Management LP | 14,768 | $367.9K | 0.00% | +14,768 | New |
| RBF Capital, LLC | 15,272 | $380.4K | 0.02% | 00.0% | Unchanged |
| Invesco Ltd. | 17,165 | $427.6K | 0.00% | +195+1.1% | Added |
| AJU IB Investment Co., Ltd. | 17,500 | $435.9K | 1.43% | 00.0% | Unchanged |
| Brevan Howard Capital Management LP | 18,791 | $468.1K | 0.00% | +18,791 | New |
| Citigroup Inc | 18,845 | $469.4K | 0.00% | +17,802+1,706.8% | Added |
| Bank of America Corp | 18,873 | $470.1K | 0.00% | +14,661+348.1% | Added |
| StemPoint Capital LP | 23,295 | $580.3K | 0.11% | +23,295 | New |
| Gsa Capital Partners LLP | 25,822 | $643.0K | 0.04% | −63,245−71.0% | Reduced |
| Goldman Sachs Group Inc | 27,187 | $677.2K | 0.00% | +11,518+73.5% | Added |
| Jane Street Group, LLC | 27,760 | $691.5K | 0.00% | +4,815+21.0% | Added |
| Northern Trust Corp | 33,166 | $826.2K | 0.00% | +18,787+130.7% | Added |
| Trexquant Investment LP | 34,343 | $855.5K | 0.01% | +34,343 | New |
| Fisher Asset Management, LLC | 35,295 | $879.2K | 0.00% | −100.0% | Reduced |
| State Street Corp | 52,118 | $1.30M | 0.00% | +17,852+52.1% | Added |
| Two Sigma Investments, LP | 65,176 | $1.62M | 0.00% | +18,684+40.2% | Added |
| Burkehill Global Management, LP | 71,530 | $1.78M | 0.09% | +71,530 | New |
| Eversept Partners, LP | 73,161 | $1.82M | 0.12% | −120,410−62.2% | Reduced |
| Susquehanna International Group, LLP | 84,902 | $2.11M | 0.00% | +84,902 | New |
| Vanguard Fiduciary Trust Co | 94,838 | $2.36M | 0.00% | +94,838 | New |
| Renaissance Technologies LLC | 97,824 | $2.44M | 0.00% | −25,041−20.4% | Reduced |
| Citadel Advisors LLC | 117,537 | $2.93M | 0.00% | +85,452+266.3% | Added |
| Geode Capital Management, LLC | 171,386 | $4.27M | 0.00% | +87,407+104.1% | Added |
| Opaleye Management Inc. | 190,671 | $4.75M | 0.63% | 00.0% | Unchanged |
| Adage Capital Partners GP, L.L.C. | 200,000 | $4.98M | 0.01% | 00.0% | Unchanged |
| Millennium Management LLC | 210,378 | $5.24M | 0.00% | −207,818−49.7% | Reduced |
| Marshall Wace, LLP | 222,634 | $5.55M | 0.01% | +137,019+160.0% | Added |
| KVP Capital Advisors, LP | 226,575 | $5.64M | 4.22% | +226,575 | New |
| BlackRock, Inc. | 232,684 | $5.80M | 0.00% | +115,247+98.1% | Added |
| Acuta Capital Partners, LLC | 269,425 | $6.71M | 4.77% | +201,974+299.4% | Added |
| Merck & Co., Inc. | 272,351 | $6.78M | 1.94% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 335,813 | $8.36M | 0.01% | −2,140−0.6% | Reduced |
| UBS Group AG | 392,871 | $9.79M | 0.00% | +385,001+4,892.0% | Added |
| Woodline Partners LP | 457,441 | $11.4M | 0.04% | +457,441 | New |
| Balyasny Asset Management LLC | 465,792 | $11.6M | 0.02% | +235,743+102.5% | Added |
| Velan Capital Investment Management LP | 512,160 | $12.8M | 7.99% | +200,160+64.2% | Added |
| ADAR1 Capital Management, LLC | 524,441 | $13.1M | 0.79% | +457,364+681.8% | Added |
| Point72 Asset Management, L.P. | 692,111 | $17.2M | 0.03% | +513,023+286.5% | Added |
| 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 |
| Vanguard Capital Management LLC | 720,442 | $17.9M | 0.00% | +720,442 | New |
| OrbiMed Advisors LLC | 801,144 | $20.0M | 0.45% | +801,144 | New |
| Kynam Capital Management, LP | 872,558 | $21.7M | 1.38% | +392,968+81.9% | Added |
| Samsara BioCapital, LLC | 1,062,872 | $26.5M | 2.57% | +858,369+419.7% | Added |
| Affinity Asset Advisors, LLC | 1,069,519 | $26.6M | 1.56% | +321,137+42.9% | Added |
| BVF Inc | 1,251,788 | $31.2M | 0.99% | +1,251,788 | New |
| 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 |