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