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
- +2.10M (+14.6%) vs. Q1 2026
- Total value
- $545.7M
- +$187.4M (+52.3%) 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 | $358.3M |
| 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, 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 |
|---|---|---|---|---|---|
| Ra Capital Management, L.P. | 0 | $0 | 0.00% | −715,307−100.0% | Sold out |
| Adage Capital Partners GP, L.L.C. | 0 | $0 | 0.00% | −200,000−100.0% | Sold out |
| Opaleye Management Inc. | 0 | $0 | 0.00% | −190,671−100.0% | Sold out |
| Eversept Partners, LP | 0 | $0 | 0.00% | −73,161−100.0% | Sold out |
| Burkehill Global Management, LP | 0 | $0 | 0.00% | −71,530−100.0% | Sold out |
| Jane Street Group, LLC | 0 | $0 | 0.00% | −27,760−100.0% | Sold out |
| StemPoint Capital LP | 0 | $0 | 0.00% | −23,295−100.0% | Sold out |
| Brevan Howard Capital Management LP | 0 | $0 | 0.00% | −18,791−100.0% | Sold out |
| AJU IB Investment Co., Ltd. | 0 | $0 | 0.00% | −17,500−100.0% | Sold out |
| Hudson Bay Capital Management LP | 0 | $0 | 0.00% | −14,768−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −12,385−100.0% | Sold out |
| Omers Administration Corp | 0 | $0 | 0.00% | −8,700−100.0% | Sold out |
| AQR Capital Management LLC | 0 | $0 | 0.00% | −8,605−100.0% | Sold out |
| State of Tennessee, Treasury Department | 0 | $0 | 0.00% | −7,400−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −62−100.0% | Sold out |
| EverSource Wealth Advisors, LLC | 0 | $0 | 0.00% | −19−100.0% | Sold out |
| Advisory Services Network, LLC | 0 | $0 | 0.00% | −15−100.0% | Sold out |
| CWM, LLC | – | – | – | – | Not filed |