Mersana Therapeutics, Inc.
MRSNDelisted Jan 6, 2026- Industry
- Pharmaceutical Preparations
- SEC CIK
- 0001442836
Mersana Therapeutics, Inc. was delisted on Jan 6, 2026; its insiders filed their last Form 4 on Jan 6, 2026; 51 institutions reported holding it in 13F filings for Q4 2025, worth $64.8M in total; no superinvestor held it.
13F holders, Q3 2024
Institutional positions in Mersana Therapeutics, Inc. as of Sep 30, 2024. 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
- 116
- −4 vs. Q2 2024
- Shares held
- 116.1M
- +10.6M (+10.0%) vs. Q2 2024
- Total value
- $219.4M
- +$7.36M (+3.5%) vs. Q2 2024
- New holders
- 13
- 38 more added
- Sold out
- 17
- 33 more reduced
2 institutions that held it in Q2 2024 haven't filed for Q3 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2024: new holders, sold out and not filed yet
Holders and value by quarter
Institutions reporting MRSN 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 | 0 | $0 |
| Q1 2026 | 1 | $87 |
| Q4 2025 | 51 | $64.8M |
| Q3 2025 | 49 | $24.7M |
| Q2 2025 | 85 | $22.9M |
| Q1 2025 | 111 | $30.2M |
| Q4 2024 | 132 | $149.2M |
| Q3 2024 | 116 | $219.4M |
| Q2 2024 | 122 | $229.6M |
| Q1 2024 | 125 | $526.3M |
| Q4 2023 | 106 | $263.0M |
| Q3 2023 | 128 | $144.4M |
| Q2 2023 | 147 | $370.2M |
| Q1 2023 | 158 | $437.2M |
| Q4 2022 | 152 | $592.8M |
| Q3 2022 | 152 | $623.4M |
| Q2 2022 | 126 | $408.0M |
| Q1 2022 | 128 | $322.7M |
| Q4 2021 | 122 | $436.6M |
| Q3 2021 | 110 | $648.3M |
| Q2 2021 | 131 | $957.8M |
| Q1 2021 | 132 | $1.14B |
Institutions, Q3 2024
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q2 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Silverarc Capital Management, LLC | 1,585,786 | $3.00M | 0.68% | −914,799−36.6% | Reduced |
| Deutsche Bank AG | 1,596,173 | $3.02M | 0.00% | +20,173+1.3% | Added |
| Boxer Capital, LLC | 1,817,000 | $3.43M | 0.17% | +1,817,000 | New |
| Goldman Sachs Group Inc | 1,959,236 | $3.70M | 0.00% | +714,299+57.4% | Added |
| Schonfeld Strategic Advisors LLC | 2,223,308 | $4.20M | 0.03% | −753,610−25.3% | Reduced |
| JPMorgan Chase & Co | 2,351,359 | $4.44M | 0.00% | +374,460+18.9% | Added |
| Geode Capital Management, LLC | 2,413,215 | $4.56M | 0.00% | −80,208−3.2% | Reduced |
| State Street Corp | 2,725,394 | $5.15M | 0.00% | +43,339+1.6% | Added |
| Rock Springs Capital Management LP | 3,046,782 | $5.76M | 0.19% | 00.0% | Unchanged |
| Citadel Advisors LLC | 4,411,555 | $8.34M | 0.01% | +1,667,956+60.8% | Added |
| Vanguard Group Inc | 7,177,458 | $13.6M | 0.00% | +474,937+7.1% | Added |
| BlackRock, Inc. | 8,621,861 | $16.3M | 0.00% | +8,621,861 | New |
| Bain Capital Life Sciences Investors, LLC | 8,663,673 | $16.4M | 1.70% | 00.0% | Unchanged |
| VR Adviser, LLC | 11,328,000 | $21.4M | 1.12% | 00.0% | Unchanged |
| Nextech Invest AG | 12,067,246 | $22.8M | 3.20% | +2,541,100+26.7% | Added |
| EcoR1 Capital, LLC | 19,364,688 | $36.6M | 1.25% | 00.0% | Unchanged |
| Cormorant Asset Management, LP | 0 | $0 | 0.00% | −2,600,000−100.0% | Sold out |
| Affinity Asset Advisors, LLC | 0 | $0 | 0.00% | −767,000−100.0% | Sold out |
| Bridgeway Capital Management, LLC | 0 | $0 | 0.00% | −475,500−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −259,689−100.0% | Sold out |
| Marshall Wace, LLP | 0 | $0 | 0.00% | −176,029−100.0% | Sold out |
| Superstring Capital Management LP | 0 | $0 | 0.00% | −110,073−100.0% | Sold out |
| ExodusPoint Capital Management, LP | 0 | $0 | 0.00% | −107,174−100.0% | Sold out |
| State of Wisconsin Investment Board | 0 | $0 | 0.00% | −83,600−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −80,562−100.0% | Sold out |
| Aigen Investment Management, LP | 0 | $0 | 0.00% | −50,083−100.0% | Sold out |
| Y-Intercept (Hong Kong) Ltd | 0 | $0 | 0.00% | −46,779−100.0% | Sold out |
| AJOVista, LLC | 0 | $0 | 0.00% | −20,463−100.0% | Sold out |
| Principal Financial Group Inc | 0 | $0 | 0.00% | −18,278−100.0% | Sold out |
| Prudential Financial Inc | 0 | $0 | 0.00% | −17,335−100.0% | Sold out |
| Dimensional Fund Advisors LP | 0 | $0 | 0.00% | −13,703−100.0% | Sold out |
| State of Wyoming | 0 | $0 | 0.00% | −9,158−100.0% | Sold out |
| Optiver Holding B.V. | 0 | $0 | 0.00% | −1,586−100.0% | Sold out |
| BlackRock Inc. | – | – | – | – | Not filed |
| Susquehanna Fundamental Investments, LLC | – | – | – | – | Not filed |