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 |
|---|---|---|---|---|---|
| OrbiMed Advisors LLC | 9,011,437 | $60.9M | 1.21% | 00.0% | Unchanged |
| Bain Capital Life Sciences Investors, LLC | 8,663,673 | $58.6M | 6.99% | 00.0% | Unchanged |
| Avoro Capital Advisors LLC | 7,550,000 | $51.0M | 0.94% | 00.0% | Unchanged |
| BlackRock Inc. | 7,088,087 | $47.9M | 0.00% | −1,792,932−20.2% | Reduced |
| Vanguard Group Inc | 4,377,999 | $29.6M | 0.00% | −355,732−7.5% | Reduced |
| Bellevue Group AG | 4,082,600 | $27.6M | 0.40% | +187,400+4.8% | Added |
| Rock Springs Capital Management LP | 4,075,958 | $27.6M | 0.71% | 00.0% | Unchanged |
| State Street Corp | 4,059,020 | $27.4M | 0.00% | +2,438,690+150.5% | Added |
| Sarissa Capital Management LP | 3,997,010 | $27.0M | 3.05% | −302,287−7.0% | Reduced |
| Millennium Management LLC | 3,784,175 | $25.6M | 0.03% | −598,526−13.7% | Reduced |
| D. E. Shaw & Co., Inc. | 2,624,223 | $17.7M | 0.03% | +646,293+32.7% | Added |
| Candriam Luxembourg S.C.A. | 2,497,848 | $16.9M | 0.12% | +507,289+25.5% | Added |
| Goldman Sachs Group Inc | 2,403,969 | $16.3M | 0.00% | +543,622+29.2% | Added |
| Artal Group S.A. | 2,200,000 | $14.9M | 0.78% | 00.0% | Unchanged |
| Geode Capital Management, LLC | 1,650,019 | $11.2M | 0.00% | +78,079+5.0% | Added |
| Morgan Stanley | 1,594,574 | $10.8M | 0.00% | +20,870+1.3% | Added |
| Nuveen Asset Management, LLC | 1,269,121 | $8.58M | 0.00% | +827,287+187.2% | Added |
| Deutsche Bank AG | 1,118,862 | $7.56M | 0.00% | −5,853−0.5% | Reduced |
| Two Sigma Advisers, LP | 1,117,700 | $7.56M | 0.02% | +31,000+2.9% | Added |
| Silverarc Capital Management, LLC | 994,073 | $6.72M | 2.85% | +144,073+16.9% | Added |
| Ally Bridge Group (NY) LLC | 931,539 | $6.30M | 4.16% | +931,539 | New |
| Decheng Capital Management III (Cayman), LLC | 904,268 | $6.11M | 2.22% | 00.0% | Unchanged |
| Opaleye Management Inc. | 900,300 | $6.09M | 2.51% | −146,700−14.0% | Reduced |
| Northern Trust Corp | 872,220 | $5.90M | 0.00% | +15,734+1.8% | Added |
| Renaissance Technologies LLC | 698,819 | $4.72M | 0.01% | +128,500+22.5% | Added |
| Hillsdale Investment Management Inc. | 690,500 | $4.67M | 0.42% | +690,500 | New |
| Two Sigma Investments, LP | 682,082 | $4.61M | 0.02% | +230,908+51.2% | Added |
| Charles Schwab Investment Management Inc | 643,645 | $4.35M | 0.00% | −12,519−1.9% | Reduced |
| Invesco Ltd. | 561,274 | $3.79M | 0.00% | +532,084+1,822.8% | Added |
| Marshall Wace, LLP | 528,468 | $3.57M | 0.01% | +528,468 | New |
| Dimensional Fund Advisors LP | 492,488 | $3.33M | 0.00% | +283,428+135.6% | Added |
| Jacobs Levy Equity Management, Inc | 403,687 | $2.73M | 0.02% | +403,687 | New |
| Bank of America Corp | 397,646 | $2.69M | 0.00% | +340,869+600.4% | Added |
| Cubist Systematic Strategies, LLC | 392,528 | $2.65M | 0.02% | +273,012+228.4% | Added |
| DAFNA Capital Management LLC | 377,763 | $2.55M | 0.69% | −29,000−7.1% | Reduced |
| UBS Oconnor LLC | 376,496 | $2.54M | 0.03% | −114,552−23.3% | Reduced |
| Fred Alger Management, LLC | 373,895 | $2.53M | 0.01% | −75,766−16.8% | Reduced |
| Bank of New York Mellon Corp | 360,596 | $2.44M | 0.00% | +16,884+4.9% | Added |
| Kennedy Capital Management, Inc. | 323,446 | $2.19M | 0.06% | +235,044+265.9% | Added |
| Platinum Investment Management Ltd | 290,298 | $1.96M | 0.08% | −205,183−41.4% | Reduced |
| Connor, Clark & Lunn Investment Management Ltd. | 258,687 | $1.75M | 0.01% | +258,687 | New |
| Hudson Bay Capital Management LP | 245,000 | $1.66M | 0.02% | −155,000−38.8% | Reduced |
| Voya Investment Management LLC | 239,284 | $1.62M | 0.00% | +206,112+621.3% | Added |
| BNP Paribas Arbitrage, SA | 237,665 | $1.61M | 0.00% | −302,038−56.0% | Reduced |
| AXA S.A. | 232,800 | $1.57M | 0.01% | +222,000+2,055.6% | Added |
| FMR LLC | 215,721 | $1.46M | 0.00% | +92,342+74.8% | Added |
| Rafferty Asset Management, LLC | 213,763 | $1.45M | 0.02% | +213,763 | New |
| Citigroup Inc | 197,277 | $1.33M | 0.00% | +187,678+1,955.2% | Added |
| Panagora Asset Management Inc | 186,777 | $1.26M | 0.01% | +186,777 | New |
| Swiss National Bank | 183,996 | $1.24M | 0.00% | +6,000+3.4% | Added |
| Citadel Advisors LLC | 176,903 | $1.20M | 0.00% | −174,512−49.7% | Reduced |
| Gsa Capital Partners LLP | 166,992 | $1.13M | 0.15% | −1,752−1.0% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 162,700 | $1.10M | 0.01% | +120,400+284.6% | Added |
| ExodusPoint Capital Management, LP | 157,411 | $1.06M | 0.01% | +131,882+516.6% | Added |
| Macquarie Group Ltd | 153,793 | $1.04M | 0.00% | −625−0.4% | Reduced |
| LMR Partners LLP | 150,000 | $1.01M | 0.03% | +150,000 | New |
| Rhumbline Advisers | 147,701 | $998.0K | 0.00% | +12,157+9.0% | Added |
| State of Wisconsin Investment Board | 137,770 | $931.0K | 0.00% | −102,959−42.8% | Reduced |
| Barclays PLC | 135,722 | $918.0K | 0.00% | +101,635+298.2% | Added |
| HRT Financial LP | 112,813 | $762.0K | 0.01% | +112,813 | New |
| Los Angeles Capital Management LLC | 112,525 | $761.0K | 0.00% | +112,525 | New |
| Price T Rowe Associates Inc | 112,039 | $758.0K | 0.00% | −27,780−19.9% | Reduced |
| Occudo Quantitative Strategies LP | 112,026 | $757.0K | 0.06% | +92,970+487.9% | Added |
| Prudential Financial Inc | 102,755 | $694.0K | 0.00% | +63,060+158.9% | Added |
| Credit Suisse AG | 102,667 | $693.0K | 0.00% | +22,125+27.5% | Added |
| California State Teachers Retirement System | 102,344 | $692.0K | 0.00% | +609+0.6% | Added |
| Susquehanna International Group, LLP | 102,415 | $692.0K | 0.00% | +83,322+436.4% | Added |
| Resolute Capital Asset Partners LLC | 100,000 | $676.0K | 0.61% | +100,000 | New |
| Alliancebernstein L.P. | 99,700 | $674.0K | 0.00% | +9,800+10.9% | Added |
| Trexquant Investment LP | 94,950 | $642.0K | 0.02% | +94,950 | New |
| AQR Capital Management LLC | 90,413 | $611.0K | 0.00% | +67,013+286.4% | Added |
| UBS Asset Management Americas Inc | 88,374 | $597.4K | 0.00% | 00.0% | Unchanged |
| Schonfeld Strategic Advisors LLC | 86,151 | $583.0K | 0.00% | +86,151 | New |
| Voloridge Investment Management, LLC | 79,464 | $537.0K | 0.00% | +79,464 | New |
| Balyasny Asset Management LLC | 63,527 | $430.0K | 0.00% | +8,278+15.0% | Added |
| XTX Topco Ltd | 63,343 | $428.0K | 0.11% | +24,619+63.6% | Added |
| QVT Financial LP | 62,657 | $424.0K | 0.03% | 00.0% | Unchanged |
| JPMorgan Chase & Co | 60,126 | $406.0K | 0.00% | −391,013−86.7% | Reduced |
| Allianz Asset Management GmbH | 60,100 | $406.0K | 0.00% | −175,125−74.4% | Reduced |
| Algert Global LLC | 58,658 | $397.0K | 0.02% | +58,658 | New |
| Engineers Gate Manager LP | 58,500 | $395.0K | 0.02% | +58,500 | New |
| New York State Common Retirement Fund | 56,001 | $379.0K | 0.00% | +7,296+15.0% | Added |
| Qube Research & Technologies Ltd | 55,089 | $372.0K | 0.00% | +31,963+138.2% | Added |
| Harvest Investment Services, LLC | 54,998 | $371.0K | 0.45% | +54,998 | New |
| MetLife Investment Management | 46,642 | $315.3K | 0.00% | +8,147+21.2% | Added |
| Jump Financial, LLC | 44,598 | $301.0K | 0.01% | +44,598 | New |
| American International Group, Inc. | 42,793 | $289.0K | 0.00% | +1,776+4.3% | Added |
| Cornercap Investment Counsel Inc | 42,633 | $288.0K | 0.05% | +2,156+5.3% | Added |
| SG Americas Securities, LLC | 39,597 | $268.0K | 0.00% | −7,958−16.7% | Reduced |
| Tower Research Capital LLC (TRC) | 36,410 | $246.0K | 0.00% | +27,918+328.8% | Added |
| Manufacturers Life Insurance Company, The | 35,316 | $238.7K | 0.00% | −1,023−2.8% | Reduced |
| Virtus ETF Advisers LLC | 35,048 | $237.0K | 0.09% | +249+0.7% | Added |
| Arrowstreet Capital, Limited Partnership | 34,771 | $235.0K | 0.00% | +34,771 | New |
| Legal & General Group Plc | 33,887 | $229.0K | 0.00% | +2,341+7.4% | Added |
| Mirae Asset Global Investments Co., Ltd. | 33,787 | $228.0K | 0.00% | +11,171+49.4% | Added |
| Jane Street Group, LLC | 33,416 | $226.0K | 0.00% | +33,416 | New |
| Ergoteles LLC | 32,161 | $217.0K | 0.01% | +32,161 | New |
| Dynamic Technology Lab Private Ltd | 31,698 | $214.0K | 0.02% | +10,862+52.1% | Added |
| Ameriprise Financial Inc | 27,370 | $185.0K | 0.00% | +27,370 | New |
| State Board of Administration of Florida Retirement System | 27,292 | $184.0K | 0.00% | 00.0% | Unchanged |