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, Q2 2026
Institutional positions in Sutro Biopharma, Inc. as of Jun 30, 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
- 100
- +23 vs. Q1 2026
- Shares held
- 16.5M
- +2.07M (+14.4%) vs. Q1 2026
- Total value
- $545.7M
- +$186.8M (+52.0%) vs. Q1 2026
- New holders
- 40
- 24 more added
- Sold out
- 17
- 18 more reduced
1 institution that held it in Q1 2026 haven't filed for Q2 2026 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q1 2026: 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, Q2 2026
Shares, value and share of portfolio for each institution holding Sutro Biopharma, Inc.; share changes are against Q1 2026.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Perceptive Advisors LLC | 1,304,846 | $43.3M | 0.67% | +589,539+82.4% | Added |
| BVF Inc | 1,251,788 | $41.6M | 1.06% | 00.0% | Unchanged |
| Affinity Asset Advisors, LLC | 1,172,487 | $38.9M | 1.90% | +102,968+9.6% | Added |
| BlackRock, Inc. | 1,122,655 | $37.3M | 0.00% | +889,971+382.5% | Added |
| Samsara BioCapital, LLC | 1,062,872 | $35.3M | 2.90% | 00.0% | Unchanged |
| Kynam Capital Management, LP | 872,558 | $29.0M | 1.60% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 743,944 | $24.7M | 0.47% | −57,200−7.1% | Reduced |
| Balyasny Asset Management LLC | 711,162 | $23.6M | 0.04% | +245,370+52.7% | Added |
| Vanguard Capital Management LLC | 694,219 | $23.0M | 0.00% | −26,223−3.6% | Reduced |
| Eventide Asset Management, LLC | 585,262 | $19.4M | 0.26% | −130,045−18.2% | Reduced |
| Velan Capital Investment Management LP | 512,160 | $17.0M | 10.42% | 00.0% | Unchanged |
| Woodline Partners LP | 458,029 | $15.2M | 0.05% | +588+0.1% | Added |
| ADAR1 Capital Management, LLC | 404,014 | $13.4M | 0.63% | −120,427−23.0% | Reduced |
| Geode Capital Management, LLC | 389,692 | $12.9M | 0.00% | +218,306+127.4% | Added |
| Acadian Asset Management LLC | 373,839 | $12.4M | 0.01% | +38,026+11.3% | Added |
| Millennium Management LLC | 365,972 | $12.2M | 0.01% | +155,594+74.0% | Added |
| State Street Corp | 305,979 | $10.2M | 0.00% | +253,861+487.1% | Added |
| Merck & Co., Inc. | 272,351 | $9.04M | 1.72% | 00.0% | Unchanged |
| Acuta Capital Partners, LLC | 270,251 | $8.97M | 6.25% | +826+0.3% | Added |
| Ameriprise Financial Inc | 244,669 | $8.12M | 0.00% | +244,669 | New |
| Point72 Asset Management, L.P. | 237,827 | $7.90M | 0.01% | −454,284−65.6% | Reduced |
| KVP Capital Advisors, LP | 226,575 | $7.52M | 5.52% | 00.0% | Unchanged |
| UBS Group AG | 208,512 | $6.92M | 0.00% | −184,359−46.9% | Reduced |
| Two Sigma Investments, LP | 201,688 | $6.70M | 0.01% | +136,512+209.5% | Added |
| Vanguard Portfolio Management LLC | 197,562 | $6.56M | 0.00% | +197,562 | New |
| Marshall Wace, LLP | 175,246 | $5.82M | 0.00% | −47,388−21.3% | Reduced |
| Nuveen, LLC | 167,997 | $5.58M | 0.00% | +167,997 | New |
| JPMorgan Chase & Co | 159,627 | $5.32M | 0.00% | +159,627 | New |
| Goldman Sachs Group Inc | 149,216 | $4.95M | 0.00% | +122,029+448.9% | Added |
| Northern Trust Corp | 125,933 | $4.18M | 0.00% | +92,767+279.7% | Added |
| Seven Fleet Capital Management LP | 159,118 | $3.79M | 0.63% | +159,118 | New |
| Qube Research & Technologies Ltd | 106,610 | $3.54M | 0.00% | +106,610 | New |
| Vanguard Fiduciary Trust Co | 104,232 | $3.46M | 0.00% | +9,394+9.9% | Added |
| Citadel Advisors LLC | 101,965 | $3.39M | 0.00% | −15,572−13.2% | Reduced |
| Mackenzie Financial Corp | 94,767 | $3.15M | 0.00% | +94,767 | New |
| Renaissance Technologies LLC | 86,324 | $2.87M | 0.00% | −11,500−11.8% | Reduced |
| Invesco Ltd. | 57,305 | $1.90M | 0.00% | +40,140+233.8% | Added |
| Y-Intercept (Hong Kong) Ltd | 55,879 | $1.86M | 0.04% | +55,879 | New |
| Squarepoint Ops LLC | 55,539 | $1.84M | 0.00% | +55,539 | New |
| XTX Topco Ltd | 52,169 | $1.73M | 0.02% | +43,966+536.0% | Added |
| Charles Schwab Investment Management Inc | 49,302 | $1.64M | 0.00% | +38,725+366.1% | Added |
| Sigma Planning Corp | 45,020 | $1.49M | 0.04% | +32,500+259.6% | Added |
| Bank of New York Mellon Corp | 41,369 | $1.37M | 0.00% | +41,369 | New |
| Barclays PLC | 36,954 | $1.23M | 0.00% | +36,815+26,485.6% | Added |
| Bank of America Corp | 36,140 | $1.20M | 0.00% | +17,267+91.5% | Added |
| Fisher Asset Management, LLC | 35,295 | $1.17M | 0.00% | 00.0% | Unchanged |
| Elmind Capital, LP | 32,037 | $1.06M | 0.27% | +32,037 | New |
| D. E. Shaw & Co., Inc. | 30,128 | $1.00M | 0.00% | +30,128 | New |
| Trexquant Investment LP | 27,636 | $917.5K | 0.01% | −6,707−19.5% | Reduced |
| BNP Paribas Arbitrage, SA | 27,383 | $909.1K | 0.00% | +27,272+24,569.4% | Added |
| Rhumbline Advisers | 20,628 | $684.8K | 0.00% | +20,628 | New |
| Gsa Capital Partners LLP | 19,749 | $656.0K | 0.04% | −6,073−23.5% | Reduced |
| SEI Investments Co | 16,387 | $544.0K | 0.00% | +16,387 | New |
| EAM Investors, LLC | 16,232 | $538.9K | 0.05% | +16,232 | New |
| Deutsche Bank AG | 15,563 | $516.7K | 0.00% | +15,563 | New |
| RBF Capital, LLC | 15,272 | $507.0K | 0.02% | 00.0% | Unchanged |
| Price T Rowe Associates Inc | 13,597 | $452.0K | 0.00% | +13,597 | New |
| Wells Fargo & Company | 13,544 | $449.7K | 0.00% | +13,544 | New |
| Morgan Stanley | 12,356 | $410.2K | 0.00% | +1,827+17.4% | Added |
| Wellington Management Group LLP | 10,800 | $358.6K | 0.00% | +10,800 | New |
| MetLife Investment Management | 9,401 | $312.1K | 0.00% | +9,401 | New |
| Walleye Capital LLC | 9,306 | $309.0K | 0.00% | +9,306 | New |
| Integrated Quantitative Investments LLC | 8,939 | $296.8K | 0.05% | +8,939 | New |
| Susquehanna International Group, LLP | 8,426 | $279.7K | 0.00% | −76,476−90.1% | Reduced |
| Lighthouse Investment Partners, LLC | 8,368 | $277.8K | 0.01% | +8,368 | New |
| Citigroup Inc | 7,456 | $247.5K | 0.00% | −11,389−60.4% | Reduced |
| Mirae Asset Global ETFs Holdings Ltd. | 7,313 | $242.8K | 0.00% | +7,313 | New |
| Alliancebernstein L.P. | 7,300 | $242.4K | 0.00% | +7,300 | New |
| State Board of Administration of Florida Retirement System | 7,001 | $232.4K | 0.00% | +7,001 | New |
| Persistent Asset Partners Ltd | 6,569 | $218.1K | 0.07% | −842−11.4% | Reduced |
| Verdad Advisers, LP | 6,400 | $212.5K | 0.20% | +6,400 | New |
| HSBC Holdings PLC | 6,234 | $205.7K | 0.00% | +6,234 | New |
| New York State Common Retirement Fund | 5,600 | $185.9K | 0.00% | +5,600 | New |
| Vanguard Global Advisers, LLC | 5,445 | $180.8K | 0.00% | −1,737−24.2% | Reduced |
| Police & Firemen's Retirement System of New Jersey | 4,704 | $156.2K | 0.00% | +4,704 | New |
| Legal & General Group Plc | 3,462 | $114.9K | 0.00% | +3,462 | New |
| State of Wyoming | 1,618 | $53.7K | 0.01% | +1,618 | New |
| Ameritas Investment Partners, Inc. | 1,448 | $48.1K | 0.00% | +1,448 | New |
| FMR LLC | 1,339 | $44.5K | 0.00% | +289+27.5% | Added |
| Russell Investments Group, Ltd. | 1,275 | $42.3K | 0.00% | +1,275 | New |
| FNY Investment Advisers, LLC | 1,000 | $33.0K | 0.01% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 866 | $28.8K | 0.00% | +866 | New |
| Royal Bank of Canada | 687 | $23.0K | 0.00% | +675+5,625.0% | Added |
| Owl Creek Wealth Partners LLC | 491 | $16.3K | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 281 | $9.33K | 0.00% | +281 | New |
| California State Teachers Retirement System | 220 | $7.30K | 0.00% | +220 | New |
| Quantbot Technologies LP | 201 | $6.67K | 0.00% | +201 | New |
| UMA Financial Services, Inc. | 182 | $6.04K | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 100 | $3.32K | 0.00% | −1,180−92.2% | Reduced |
| The PNC Financial Services Group, Inc. | 62 | $2.06K | 0.00% | 00.0% | Unchanged |
| Fortitude Family Office, LLC | 56 | $1.86K | 0.00% | 00.0% | Unchanged |
| Bogart Wealth, LLC | 50 | $1.66K | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 47 | $1.56K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 44 | $1.46K | 0.00% | 00.0% | Unchanged |
| Avion Wealth | 46 | $1.00K | 0.00% | −26−36.1% | Reduced |
| HighMark Wealth Management LLC | 23 | $763 | 0.00% | 00.0% | Unchanged |
| SRS Capital Advisors, Inc. | 16 | $531 | 0.00% | −25−61.0% | Reduced |
| Fifth Third Bancorp | 2 | $66 | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 2 | $66 | 0.00% | +2 | New |
| Optiver Holding B.V. | 2 | $66 | 0.00% | +2 | New |