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 2025
Institutional positions in Mersana Therapeutics, Inc. as of Jun 30, 2025. 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
- 85
- −26 vs. Q1 2025
- Shares held
- 77.4M
- −10.4M (−11.9%) vs. Q1 2025
- Total value
- $22.9M
- −$7.31M (−24.2%) vs. Q1 2025
- New holders
- 14
- 23 more added
- Sold out
- 40
- 30 more reduced
Compare with Q1 2025: 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 2025
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Nextech Invest, Ltd. | 12,067,246 | $3.57M | 0.68% | 00.0% | Unchanged |
| Bain Capital Life Sciences Investors, LLC | 8,663,673 | $2.56M | 0.32% | 00.0% | Unchanged |
| Vanguard Group Inc | 7,678,391 | $2.27M | 0.00% | −699,376−8.3% | Reduced |
| Schonfeld Strategic Advisors LLC | 5,673,852 | $1.68M | 0.01% | −1,940,212−25.5% | Reduced |
| AQR Capital Management LLC | 5,129,685 | $1.52M | 0.00% | −14,064−0.3% | Reduced |
| Rock Springs Capital Management LP | 3,814,684 | $1.13M | 0.07% | 00.0% | Unchanged |
| BlackRock, Inc. | 3,763,419 | $1.11M | 0.00% | −4,562,763−54.8% | Reduced |
| Silverarc Capital Management, LLC | 3,128,421 | $926.0K | 0.19% | +39,916+1.3% | Added |
| Acadian Asset Management LLC | 2,955,280 | $873.0K | 0.00% | −34,379−1.1% | Reduced |
| Renaissance Technologies LLC | 2,850,194 | $843.7K | 0.00% | +2,010,275+239.3% | Added |
| Millennium Management LLC | 2,090,235 | $618.7K | 0.00% | +2,090,235 | New |
| 683 Capital Management, LLC | 1,990,000 | $589.0K | 0.06% | +340,000+20.6% | Added |
| Catalio Capital Management, LP | 1,567,413 | $464.0K | 0.10% | −137,623−8.1% | Reduced |
| Goldman Sachs Group Inc | 1,433,760 | $424.4K | 0.00% | +847,102+144.4% | Added |
| Jacobs Levy Equity Management, Inc | 1,332,945 | $394.6K | 0.00% | −1790.0% | Reduced |
| 5AM Venture Management, LLC | 1,305,000 | $386.3K | 0.15% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 1,049,205 | $310.7K | 0.00% | −1,393,123−57.0% | Reduced |
| Luminus Management LLC | 1,039,314 | $307.6K | 0.08% | +1,039,314 | New |
| Two Sigma Advisers, LP | 937,000 | $277.4K | 0.00% | +678,800+262.9% | Added |
| Two Sigma Investments, LP | 823,269 | $243.7K | 0.00% | +769,617+1,434.5% | Added |
| UBS Group AG | 775,501 | $229.5K | 0.00% | +455,696+142.5% | Added |
| Lion Point Capital, LP | 644,000 | $190.6K | 1.29% | 00.0% | Unchanged |
| Ieq Capital, LLC | 638,452 | $189.0K | 0.00% | −68,569−9.7% | Reduced |
| Alamea Verwaltungs GmbH | 604,213 | $178.8K | 0.13% | 00.0% | Unchanged |
| Jane Street Group, LLC | 511,182 | $151.3K | 0.00% | +511,182 | New |
| Gsa Capital Partners LLP | 471,681 | $140.0K | 0.01% | +471,681 | New |
| State Street Corp | 452,110 | $133.8K | 0.00% | −2,151,758−82.6% | Reduced |
| Susquehanna International Group, LLP | 449,369 | $133.0K | 0.00% | +208,296+86.4% | Added |
| Morgan Stanley | 357,597 | $105.8K | 0.00% | +50,467+16.4% | Added |
| Cerity Partners LLC | 320,805 | $95.0K | 0.00% | +76,570+31.4% | Added |
| Deutsche Bank AG | 305,070 | $91.5K | 0.00% | −534,654−63.7% | Reduced |
| Marshall Wace, LLP | 226,971 | $68.1K | 0.00% | +226,971 | New |
| Northern Trust Corp | 222,694 | $65.9K | 0.00% | −642,093−74.2% | Reduced |
| CWM, LLC | 165,404 | $49.0K | 0.00% | −19,421−10.5% | Reduced |
| Qube Research & Technologies Ltd | 152,877 | $45.3K | 0.00% | −1,021,720−87.0% | Reduced |
| Macquarie Group Ltd | 150,000 | $44.0K | 0.00% | 00.0% | Unchanged |
| FMR LLC | 138,520 | $41.0K | 0.00% | −32,560−19.0% | Reduced |
| JPMorgan Chase & Co | 130,094 | $38.5K | 0.00% | +79,390+156.6% | Added |
| Wealth Enhancement Advisory Services, LLC | 126,729 | $36.7K | 0.00% | −3,971−3.0% | Reduced |
| Algert Global LLC | 101,313 | $30.0K | 0.00% | −33,700−25.0% | Reduced |
| Pallas Capital Advisors LLC | 96,709 | $28.6K | 0.00% | +2,178+2.3% | Added |
| Jain Global LLC | 96,154 | $28.5K | 0.00% | +96,154 | New |
| HRT Financial LP | 93,373 | $27.0K | 0.00% | +46,876+100.8% | Added |
| Point72 Asia (Singapore) Pte. Ltd. | 75,151 | $22.2K | 0.00% | +75,151 | New |
| Citigroup Inc | 72,997 | $21.6K | 0.00% | −8,628−10.6% | Reduced |
| Bank of New York Mellon Corp | 66,577 | $19.7K | 0.00% | −279,611−80.8% | Reduced |
| QVT Financial LP | 62,657 | $18.5K | 0.00% | 00.0% | Unchanged |
| Callan Family Office, LLC | 56,559 | $16.7K | 0.00% | +56,559 | New |
| R Squared Ltd | 47,229 | $14.0K | 0.01% | +47,229 | New |
| Captrust Financial Advisors | 41,746 | $12.4K | 0.00% | +10,612+34.1% | Added |
| JustInvest LLC | 36,692 | $10.9K | 0.00% | −5,946−13.9% | Reduced |
| Group One Trading, L.P. | 34,856 | $10.3K | 0.00% | +14,756+73.4% | Added |
| Tower Research Capital LLC (TRC) | 31,684 | $9.38K | 0.00% | +5,519+21.1% | Added |
| Merit Financial Group, LLC | 31,588 | $9.35K | 0.00% | −10,316−24.6% | Reduced |
| Walleye Trading LLC | 31,526 | $9.33K | 0.00% | 00.0% | Unchanged |
| Mariner, LLC | 31,213 | $9.24K | 0.00% | +10,463+50.4% | Added |
| Colony Group, LLC | 30,976 | $9.17K | 0.00% | +447+1.5% | Added |
| HSBC Holdings PLC | 30,500 | $8.78K | 0.00% | +18,006+144.1% | Added |
| China Universal Asset Management Co., Ltd. | 25,032 | $7.41K | 0.00% | +253+1.0% | Added |
| Jasper Ridge Partners, L.P. | 23,100 | $6.84K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 23,014 | $6.81K | 0.00% | −55,474−70.7% | Reduced |
| Bank of America Corp | 20,083 | $5.95K | 0.00% | −294,288−93.6% | Reduced |
| Two Sigma Securities, LLC | 17,566 | $5.20K | 0.00% | +17,566 | New |
| Parcion Private Wealth LLC | 16,233 | $4.80K | 0.00% | +941+6.2% | Added |
| Prudential Financial Inc | 14,900 | $4.40K | 0.00% | −46,635−75.8% | Reduced |
| Jump Financial, LLC | 11,323 | $3.35K | 0.00% | +11,323 | New |
| Hunter Perkins Capital Management, LLC | 10,000 | $3.00K | 0.00% | 00.0% | Unchanged |
| ExodusPoint Capital Management, LP | 11,434 | $3.00K | 0.00% | +11,434 | New |
| Barclays PLC | 9,767 | $2.89K | 0.00% | −111,958−92.0% | Reduced |
| EverSource Wealth Advisors, LLC | 5,494 | $1.63K | 0.00% | +2,796+103.6% | Added |
| Essential Partners LLC | 5,405 | $1.60K | 0.00% | +5,405 | New |
| Mirae Asset Global Investments Co., Ltd. | 4,814 | $1.43K | 0.00% | +680+16.4% | Added |
| BNP Paribas Arbitrage, SA | 2,765 | $818 | 0.00% | −198,683−98.6% | Reduced |
| GF Fund Management Co. Ltd. | 2,594 | $768 | 0.00% | 00.0% | Unchanged |
| Advisor Group Holdings, Inc. | 2,598 | $754 | 0.00% | −736−22.1% | Reduced |
| Optiver Holding B.V. | 2,312 | $684 | 0.00% | 00.0% | Unchanged |
| SBI Securities Co., Ltd. | 1,368 | $405 | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 1,050 | $311 | 0.00% | −250−19.2% | Reduced |
| The PNC Financial Services Group, Inc. | 893 | $264 | 0.00% | −2,644−74.8% | Reduced |
| Huntington National Bank | 800 | $237 | 0.00% | 00.0% | Unchanged |
| IFP Advisors, Inc | 677 | $201 | 0.00% | +677 | New |
| North Star Investment Management Corp. | 150 | $44 | 0.00% | 00.0% | Unchanged |
| Royal Bank of Canada | 150 | $0 | 0.00% | −1,468−90.7% | Reduced |
| Caitong International Asset Management Co., Ltd | 1 | $0 | 0.00% | 00.0% | Unchanged |
| Farther Finance Advisors, LLC | 1 | $0 | 0.00% | 00.0% | Unchanged |
| VR Adviser, LLC | 0 | $0 | 0.00% | −3,574,325−100.0% | Sold out |
| Woodline Partners LP | 0 | $0 | 0.00% | −435,593−100.0% | Sold out |
| Panagora Asset Management Inc | 0 | $0 | 0.00% | −370,448−100.0% | Sold out |
| State of Wyoming | 0 | $0 | 0.00% | −295,498−100.0% | Sold out |
| Charles Schwab Investment Management Inc | 0 | $0 | 0.00% | −280,631−100.0% | Sold out |
| Nuveen, LLC | 0 | $0 | 0.00% | −232,223−100.0% | Sold out |
| Alliancebernstein L.P. | 0 | $0 | 0.00% | −186,060−100.0% | Sold out |
| Rhumbline Advisers | 0 | $0 | 0.00% | −154,163−100.0% | Sold out |
| Invesco Ltd. | 0 | $0 | 0.00% | −114,863−100.0% | Sold out |
| UBS Oconnor LLC | 0 | $0 | 0.00% | −97,731−100.0% | Sold out |
| Intech Investment Management LLC | 0 | $0 | 0.00% | −90,358−100.0% | Sold out |
| SEI Investments Co | 0 | $0 | 0.00% | −69,527−100.0% | Sold out |
| Mirae Asset Global ETFs Holdings Ltd. | 0 | $0 | 0.00% | −68,760−100.0% | Sold out |
| Price T Rowe Associates Inc | 0 | $0 | 0.00% | −62,093−100.0% | Sold out |
| Corebridge Financial, Inc. | 0 | $0 | 0.00% | −52,526−100.0% | Sold out |