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, Q2 2024
Institutional positions in Mersana Therapeutics, Inc. as of Jun 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
- 122
- −3 vs. Q1 2024
- Shares held
- 114.2M
- −3.29M (−2.8%) vs. Q1 2024
- Total value
- $229.6M
- −$296.8M (−56.4%) vs. Q1 2024
- New holders
- 19
- 45 more added
- Sold out
- 22
- 36 more reduced
Compare with Q1 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, Q2 2024
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q1 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Goldman Sachs Group Inc | 1,244,937 | $2.50M | 0.00% | +572,330+85.1% | Added |
| 5AM Venture Management, LLC | 1,305,000 | $2.62M | 0.59% | 00.0% | Unchanged |
| Renaissance Technologies LLC | 1,448,219 | $2.91M | 0.00% | +20,400+1.4% | Added |
| D. E. Shaw & Co., Inc. | 1,465,580 | $2.95M | 0.00% | +242,957+19.9% | Added |
| Woodline Partners LP | 1,467,311 | $2.95M | 0.03% | −1,467,311−50.0% | Reduced |
| Deutsche Bank AG | 1,576,000 | $3.17M | 0.00% | −9,263−0.6% | Reduced |
| Acuta Capital Partners, LLC | 1,663,000 | $3.34M | 2.82% | −501,628−23.2% | Reduced |
| JPMorgan Chase & Co | 1,976,899 | $3.97M | 0.00% | +549,559+38.5% | Added |
| Morgan Stanley | 2,272,594 | $4.57M | 0.00% | −670,083−22.8% | Reduced |
| Geode Capital Management, LLC | 2,493,423 | $5.01M | 0.00% | +135,202+5.7% | Added |
| Silverarc Capital Management, LLC | 2,500,585 | $5.03M | 1.24% | −468,213−15.8% | Reduced |
| Cormorant Asset Management, LP | 2,600,000 | $5.23M | 0.30% | 00.0% | Unchanged |
| State Street Corp | 2,682,055 | $5.39M | 0.00% | −2,815,388−51.2% | Reduced |
| Citadel Advisors LLC | 2,743,599 | $5.51M | 0.01% | −715,386−20.7% | Reduced |
| Schonfeld Strategic Advisors LLC | 2,976,918 | $5.98M | 0.05% | +1,968,260+195.1% | Added |
| Rock Springs Capital Management LP | 3,046,782 | $6.12M | 0.18% | 00.0% | Unchanged |
| Vanguard Group Inc | 6,702,521 | $13.5M | 0.00% | +428,151+6.8% | Added |
| BlackRock Inc. | 8,383,910 | $16.9M | 0.00% | +288,181+3.6% | Added |
| Bain Capital Life Sciences Investors, LLC | 8,663,673 | $17.4M | 1.91% | 00.0% | Unchanged |
| Nextech Invest AG | 9,526,146 | $19.1M | 3.22% | +5,669,825+147.0% | Added |
| VR Adviser, LLC | 11,328,000 | $22.8M | 1.45% | 00.0% | Unchanged |
| EcoR1 Capital, LLC | 19,364,688 | $38.9M | 1.19% | 00.0% | Unchanged |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −3,655,998−100.0% | Sold out |
| Ally Bridge Group (NY) LLC | 0 | $0 | 0.00% | −801,437−100.0% | Sold out |
| Deep Track Capital, LP | 0 | $0 | 0.00% | −579,674−100.0% | Sold out |
| Rafferty Asset Management, LLC | 0 | $0 | 0.00% | −368,434−100.0% | Sold out |
| Monashee Investment Management LLC | 0 | $0 | 0.00% | −310,000−100.0% | Sold out |
| Cubist Systematic Strategies, LLC | 0 | $0 | 0.00% | −239,143−100.0% | Sold out |
| Canada Pension Plan Investment Board | 0 | $0 | 0.00% | −204,900−100.0% | Sold out |
| Lighthouse Investment Partners, LLC | 0 | $0 | 0.00% | −129,515−100.0% | Sold out |
| HighVista Strategies LLC | 0 | $0 | 0.00% | −122,315−100.0% | Sold out |
| Profund Advisors LLC | 0 | $0 | 0.00% | −58,220−100.0% | Sold out |
| Deerfield Management Company, L.P. (Series C) | 0 | $0 | 0.00% | −57,478−100.0% | Sold out |
| American International Group, Inc. | 0 | $0 | 0.00% | −54,639−100.0% | Sold out |
| Mirae Asset Global Investments Co., Ltd. | 0 | $0 | 0.00% | −54,127−100.0% | Sold out |
| NEOS Investment Management LLC | 0 | $0 | 0.00% | −19,465−100.0% | Sold out |
| E Fund Management Co., Ltd. | 0 | $0 | 0.00% | −17,411−100.0% | Sold out |
| Oxford Asset Management LLP | 0 | $0 | 0.00% | −16,586−100.0% | Sold out |
| Mackenzie Financial Corp | 0 | $0 | 0.00% | −13,819−100.0% | Sold out |
| Fox Run Management, L.L.C. | 0 | $0 | 0.00% | −12,261−100.0% | Sold out |
| Inceptionr LLC | 0 | $0 | 0.00% | −11,188−100.0% | Sold out |
| Metropolitan Life Insurance Co | 0 | $0 | 0.00% | −4,677−100.0% | Sold out |
| Pacer Advisors, Inc. | 0 | $0 | 0.00% | −1,716−100.0% | Sold out |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 0 | $0 | 0.00% | −22−100.0% | Sold out |