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 2022
Institutional positions in Mersana Therapeutics, Inc. as of Sep 30, 2022. 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
- 152
- +26 vs. Q2 2022
- Shares held
- 92.2M
- +3.90M (+4.4%) vs. Q2 2022
- Total value
- $623.4M
- +$215.4M (+52.8%) vs. Q2 2022
- New holders
- 40
- 61 more added
- Sold out
- 14
- 28 more reduced
Compare with Q2 2022: 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 2022
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q2 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Gsa Capital Partners LLP | 166,992 | $1.13M | 0.15% | −1,752−1.0% | Reduced |
| Citadel Advisors LLC | 176,903 | $1.20M | 0.00% | −174,512−49.7% | Reduced |
| Swiss National Bank | 183,996 | $1.24M | 0.00% | +6,000+3.4% | Added |
| Panagora Asset Management Inc | 186,777 | $1.26M | 0.01% | +186,777 | New |
| Citigroup Inc | 197,277 | $1.33M | 0.00% | +187,678+1,955.2% | Added |
| Rafferty Asset Management, LLC | 213,763 | $1.45M | 0.02% | +213,763 | New |
| FMR LLC | 215,721 | $1.46M | 0.00% | +92,342+74.8% | Added |
| AXA S.A. | 232,800 | $1.57M | 0.01% | +222,000+2,055.6% | Added |
| BNP Paribas Arbitrage, SA | 237,665 | $1.61M | 0.00% | −302,038−56.0% | Reduced |
| Voya Investment Management LLC | 239,284 | $1.62M | 0.00% | +206,112+621.3% | Added |
| Hudson Bay Capital Management LP | 245,000 | $1.66M | 0.02% | −155,000−38.8% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 258,687 | $1.75M | 0.01% | +258,687 | New |
| Platinum Investment Management Ltd | 290,298 | $1.96M | 0.08% | −205,183−41.4% | Reduced |
| Kennedy Capital Management, Inc. | 323,446 | $2.19M | 0.06% | +235,044+265.9% | Added |
| Bank of New York Mellon Corp | 360,596 | $2.44M | 0.00% | +16,884+4.9% | Added |
| Fred Alger Management, LLC | 373,895 | $2.53M | 0.01% | −75,766−16.8% | Reduced |
| UBS Oconnor LLC | 376,496 | $2.54M | 0.03% | −114,552−23.3% | Reduced |
| DAFNA Capital Management LLC | 377,763 | $2.55M | 0.69% | −29,000−7.1% | Reduced |
| Cubist Systematic Strategies, LLC | 392,528 | $2.65M | 0.02% | +273,012+228.4% | Added |
| Bank of America Corp | 397,646 | $2.69M | 0.00% | +340,869+600.4% | Added |
| Jacobs Levy Equity Management, Inc | 403,687 | $2.73M | 0.02% | +403,687 | New |
| Dimensional Fund Advisors LP | 492,488 | $3.33M | 0.00% | +283,428+135.6% | Added |
| Marshall Wace, LLP | 528,468 | $3.57M | 0.01% | +528,468 | New |
| Invesco Ltd. | 561,274 | $3.79M | 0.00% | +532,084+1,822.8% | Added |
| Charles Schwab Investment Management Inc | 643,645 | $4.35M | 0.00% | −12,519−1.9% | Reduced |
| Two Sigma Investments, LP | 682,082 | $4.61M | 0.02% | +230,908+51.2% | Added |
| Hillsdale Investment Management Inc. | 690,500 | $4.67M | 0.42% | +690,500 | New |
| Renaissance Technologies LLC | 698,819 | $4.72M | 0.01% | +128,500+22.5% | Added |
| Northern Trust Corp | 872,220 | $5.90M | 0.00% | +15,734+1.8% | Added |
| Opaleye Management Inc. | 900,300 | $6.09M | 2.51% | −146,700−14.0% | Reduced |
| Decheng Capital Management III (Cayman), LLC | 904,268 | $6.11M | 2.22% | 00.0% | Unchanged |
| Ally Bridge Group (NY) LLC | 931,539 | $6.30M | 4.16% | +931,539 | New |
| Silverarc Capital Management, LLC | 994,073 | $6.72M | 2.85% | +144,073+16.9% | Added |
| Two Sigma Advisers, LP | 1,117,700 | $7.56M | 0.02% | +31,000+2.9% | Added |
| Deutsche Bank AG | 1,118,862 | $7.56M | 0.00% | −5,853−0.5% | Reduced |
| Nuveen Asset Management, LLC | 1,269,121 | $8.58M | 0.00% | +827,287+187.2% | Added |
| Morgan Stanley | 1,594,574 | $10.8M | 0.00% | +20,870+1.3% | Added |
| Geode Capital Management, LLC | 1,650,019 | $11.2M | 0.00% | +78,079+5.0% | Added |
| Artal Group S.A. | 2,200,000 | $14.9M | 0.78% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 2,403,969 | $16.3M | 0.00% | +543,622+29.2% | Added |
| Candriam Luxembourg S.C.A. | 2,497,848 | $16.9M | 0.12% | +507,289+25.5% | Added |
| D. E. Shaw & Co., Inc. | 2,624,223 | $17.7M | 0.03% | +646,293+32.7% | Added |
| Millennium Management LLC | 3,784,175 | $25.6M | 0.03% | −598,526−13.7% | Reduced |
| Sarissa Capital Management LP | 3,997,010 | $27.0M | 3.05% | −302,287−7.0% | Reduced |
| State Street Corp | 4,059,020 | $27.4M | 0.00% | +2,438,690+150.5% | Added |
| Rock Springs Capital Management LP | 4,075,958 | $27.6M | 0.71% | 00.0% | Unchanged |
| Bellevue Group AG | 4,082,600 | $27.6M | 0.40% | +187,400+4.8% | Added |
| Vanguard Group Inc | 4,377,999 | $29.6M | 0.00% | −355,732−7.5% | Reduced |
| BlackRock Inc. | 7,088,087 | $47.9M | 0.00% | −1,792,932−20.2% | Reduced |
| Avoro Capital Advisors LLC | 7,550,000 | $51.0M | 0.94% | 00.0% | Unchanged |
| Bain Capital Life Sciences Investors, LLC | 8,663,673 | $58.6M | 6.99% | 00.0% | Unchanged |
| OrbiMed Advisors LLC | 9,011,437 | $60.9M | 1.21% | 00.0% | Unchanged |
| Woodline Partners LP | 0 | $0 | 0.00% | −3,161,576−100.0% | Sold out |
| Wellington Management Group LLP | 0 | $0 | 0.00% | −480,644−100.0% | Sold out |
| EcoR1 Capital, LLC | 0 | $0 | 0.00% | −310,960−100.0% | Sold out |
| Graham Capital Management, L.P. | 0 | $0 | 0.00% | −203,067−100.0% | Sold out |
| Caxton Associates LP | 0 | $0 | 0.00% | −47,915−100.0% | Sold out |
| Partners Group Holding AG | 0 | $0 | 0.00% | −37,473−100.0% | Sold out |
| HSBC Holdings PLC | 0 | $0 | 0.00% | −18,737−100.0% | Sold out |
| Victory Capital Management Inc | 0 | $0 | 0.00% | −12,537−100.0% | Sold out |
| Walleye Capital LLC | 0 | $0 | 0.00% | −10,264−100.0% | Sold out |
| Washington University | 0 | $0 | 0.00% | −9,367−100.0% | Sold out |
| PEAK6 Investments LLC | 0 | $0 | 0.00% | −5,000−100.0% | Sold out |
| Quantbot Technologies LP | 0 | $0 | 0.00% | −954−100.0% | Sold out |
| Captrust Financial Advisors | 0 | $0 | 0.00% | −226−100.0% | Sold out |
| Dark Forest Capital Management LP | 0 | $0 | 0.00% | −311−100.0% | Sold out |