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, Q4 2022
Institutional positions in Mersana Therapeutics, Inc. as of Dec 31, 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
- 0 vs. Q3 2022
- Shares held
- 101.2M
- +8.95M (+9.7%) vs. Q3 2022
- Total value
- $592.8M
- −$30.6M (−4.9%) vs. Q3 2022
- New holders
- 20
- 68 more added
- Sold out
- 20
- 37 more reduced
Compare with Q3 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, Q4 2022
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q3 2022.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| OrbiMed Advisors LLC | 9,011,437 | $52.8M | 1.01% | 00.0% | Unchanged |
| Bain Capital Life Sciences Investors, LLC | 8,663,673 | $50.8M | 5.67% | 00.0% | Unchanged |
| Avoro Capital Advisors LLC | 7,550,000 | $44.2M | 0.66% | 00.0% | Unchanged |
| BlackRock Inc. | 7,491,929 | $43.9M | 0.00% | +403,842+5.7% | Added |
| State Street Corp | 5,856,061 | $34.3M | 0.00% | +1,797,041+44.3% | Added |
| Vanguard Group Inc | 4,449,040 | $26.1M | 0.00% | +71,041+1.6% | Added |
| Bellevue Group AG | 4,282,600 | $25.1M | 0.33% | +200,000+4.9% | Added |
| Rock Springs Capital Management LP | 4,103,803 | $24.0M | 0.58% | +27,845+0.7% | Added |
| Sarissa Capital Management LP | 3,997,010 | $23.4M | 2.79% | 00.0% | Unchanged |
| Millennium Management LLC | 3,663,527 | $21.5M | 0.02% | −120,648−3.2% | Reduced |
| Candriam Luxembourg S.C.A. | 2,692,848 | $15.8M | 0.11% | +195,000+7.8% | Added |
| Marshall Wace, LLP | 2,523,984 | $14.8M | 0.04% | +1,995,516+377.6% | Added |
| D. E. Shaw & Co., Inc. | 2,335,939 | $13.7M | 0.02% | −288,284−11.0% | Reduced |
| Artal Group S.A. | 2,200,000 | $12.9M | 0.74% | 00.0% | Unchanged |
| Goldman Sachs Group Inc | 2,014,496 | $11.8M | 0.00% | −389,473−16.2% | Reduced |
| Braidwell LP | 1,862,700 | $10.9M | 0.37% | +1,862,700 | New |
| Morgan Stanley | 1,757,986 | $10.3M | 0.00% | +163,412+10.2% | Added |
| Geode Capital Management, LLC | 1,707,470 | $10.0M | 0.00% | +57,451+3.5% | Added |
| Nuveen Asset Management, LLC | 1,229,407 | $7.20M | 0.00% | −39,714−3.1% | Reduced |
| Ally Bridge Group (NY) LLC | 1,191,271 | $6.98M | 6.79% | +259,732+27.9% | Added |
| Silverarc Capital Management, LLC | 1,140,182 | $6.68M | 2.30% | +146,109+14.7% | Added |
| Deutsche Bank AG | 1,130,704 | $6.63M | 0.00% | +11,842+1.1% | Added |
| Two Sigma Advisers, LP | 1,053,300 | $6.17M | 0.02% | −64,400−5.8% | Reduced |
| Acuta Capital Partners, LLC | 950,000 | $5.57M | 3.43% | +950,000 | New |
| Northern Trust Corp | 904,376 | $5.30M | 0.00% | +32,156+3.7% | Added |
| Decheng Capital Management III (Cayman), LLC | 904,268 | $5.30M | 1.98% | 00.0% | Unchanged |
| Bank of America Corp | 760,723 | $4.46M | 0.00% | +363,077+91.3% | Added |
| Hillsdale Investment Management Inc. | 693,200 | $4.06M | 0.34% | +2,700+0.4% | Added |
| Charles Schwab Investment Management Inc | 671,027 | $3.93M | 0.00% | +27,382+4.3% | Added |
| Citadel Advisors LLC | 625,576 | $3.67M | 0.00% | +448,673+253.6% | Added |
| Two Sigma Investments, LP | 617,829 | $3.62M | 0.01% | −64,253−9.4% | Reduced |
| Renaissance Technologies LLC | 571,719 | $3.35M | 0.00% | −127,100−18.2% | Reduced |
| CIBC Asset Management Inc | 566,785 | $3.32M | 0.01% | +566,785 | New |
| Woodline Partners LP | 523,408 | $3.07M | 0.04% | +523,408 | New |
| Jacobs Levy Equity Management, Inc | 503,145 | $2.95M | 0.02% | +99,458+24.6% | Added |
| LMR Partners LLP | 500,000 | $2.93M | 0.07% | +350,000+233.3% | Added |
| Dimensional Fund Advisors LP | 489,783 | $2.87M | 0.00% | −2,705−0.5% | Reduced |
| Opaleye Management Inc. | 460,000 | $2.70M | 0.94% | −440,300−48.9% | Reduced |
| Kennedy Capital Management, Inc. | 438,982 | $2.57M | 0.07% | +115,536+35.7% | Added |
| Cubist Systematic Strategies, LLC | 427,152 | $2.50M | 0.02% | +34,624+8.8% | Added |
| Rafferty Asset Management, LLC | 416,864 | $2.44M | 0.02% | +203,101+95.0% | Added |
| DAFNA Capital Management LLC | 413,463 | $2.42M | 0.68% | +35,700+9.5% | Added |
| Rhenman & Partners Asset Management AB | 400,000 | $2.34M | 0.24% | +400,000 | New |
| JPMorgan Chase & Co | 386,823 | $2.27M | 0.00% | +326,697+543.4% | Added |
| Fred Alger Management, LLC | 378,450 | $2.22M | 0.01% | +4,555+1.2% | Added |
| Bank of New York Mellon Corp | 368,029 | $2.16M | 0.00% | +7,433+2.1% | Added |
| Platinum Investment Management Ltd | 290,298 | $1.70M | 0.06% | 00.0% | Unchanged |
| UBS Group AG | 288,603 | $1.69M | 0.00% | +262,308+997.6% | Added |
| Voya Investment Management LLC | 286,894 | $1.68M | 0.00% | +47,610+19.9% | Added |
| Hudson Bay Capital Management LP | 275,000 | $1.61M | 0.02% | +30,000+12.2% | Added |
| Barclays PLC | 232,088 | $1.36M | 0.00% | +96,366+71.0% | Added |
| Connor, Clark & Lunn Investment Management Ltd. | 208,433 | $1.22M | 0.01% | −50,254−19.4% | Reduced |
| Citigroup Inc | 193,472 | $1.13M | 0.00% | −3,805−1.9% | Reduced |
| Panagora Asset Management Inc | 190,963 | $1.12M | 0.01% | +4,186+2.2% | Added |
| Swiss National Bank | 187,696 | $1.10M | 0.00% | +3,700+2.0% | Added |
| Trexquant Investment LP | 157,731 | $924.3K | 0.03% | +62,781+66.1% | Added |
| Rhumbline Advisers | 152,965 | $896.0K | 0.00% | +5,264+3.6% | Added |
| Macquarie Group Ltd | 150,000 | $879.0K | 0.00% | −3,793−2.5% | Reduced |
| AQR Capital Management LLC | 135,201 | $792.3K | 0.00% | +44,788+49.5% | Added |
| XTX Topco Ltd | 132,904 | $778.8K | 0.17% | +69,561+109.8% | Added |
| FMR LLC | 123,377 | $723.0K | 0.00% | −92,344−42.8% | Reduced |
| BNP Paribas Arbitrage, SA | 122,676 | $718.9K | 0.00% | −114,989−48.4% | Reduced |
| Price T Rowe Associates Inc | 120,519 | $707.0K | 0.00% | +8,480+7.6% | Added |
| California State Teachers Retirement System | 104,473 | $612.2K | 0.00% | +2,129+2.1% | Added |
| AXA S.A. | 104,100 | $610.0K | 0.00% | −128,700−55.3% | Reduced |
| UBS Asset Management Americas Inc | 102,575 | $601.1K | 0.00% | +14,201+16.1% | Added |
| Alliancebernstein L.P. | 99,700 | $584.2K | 0.00% | 00.0% | Unchanged |
| Squarepoint Ops LLC | 97,556 | $571.7K | 0.00% | +82,170+534.1% | Added |
| Credit Suisse AG | 97,474 | $571.2K | 0.00% | −5,193−5.1% | Reduced |
| Qube Research & Technologies Ltd | 86,386 | $506.2K | 0.00% | +31,297+56.8% | Added |
| Healthcare of Ontario Pension Plan Trust Fund | 84,000 | $492.2K | 0.00% | −78,700−48.4% | Reduced |
| Occudo Quantitative Strategies LP | 81,538 | $477.8K | 0.06% | −30,488−27.2% | Reduced |
| Voloridge Investment Management, LLC | 75,216 | $440.8K | 0.00% | −4,248−5.3% | Reduced |
| Mackenzie Financial Corp | 73,692 | $431.8K | 0.00% | +73,692 | New |
| State of Wisconsin Investment Board | 72,898 | $427.2K | 0.00% | −64,872−47.1% | Reduced |
| Alps Advisors Inc | 67,736 | $396.9K | 0.00% | +67,736 | New |
| Jump Financial, LLC | 64,613 | $378.6K | 0.02% | +20,015+44.9% | Added |
| QVT Financial LP | 62,657 | $367.2K | 0.02% | 00.0% | Unchanged |
| Skandinaviska Enskilda Banken AB (publ) | 61,322 | $359.0K | 0.00% | +61,322 | New |
| Thrivent Financial for Lutherans | 60,922 | $357.0K | 0.00% | +60,922 | New |
| Allianz Asset Management GmbH | 60,100 | $352.2K | 0.00% | 00.0% | Unchanged |
| Harvest Investment Services, LLC | 59,563 | $349.0K | 0.37% | +4,565+8.3% | Added |
| Prudential Financial Inc | 58,705 | $344.0K | 0.00% | −44,050−42.9% | Reduced |
| Algert Global LLC | 58,658 | $343.7K | 0.02% | 00.0% | Unchanged |
| Alpha Paradigm Partners, LLC | 58,578 | $343.0K | 0.14% | +58,578 | New |
| Engineers Gate Manager LP | 56,002 | $328.2K | 0.02% | −2,498−4.3% | Reduced |
| New York State Common Retirement Fund | 55,981 | $328.0K | 0.00% | −200.0% | Reduced |
| Los Angeles Capital Management LLC | 51,065 | $299.2K | 0.00% | −61,460−54.6% | Reduced |
| SG Americas Securities, LLC | 48,931 | $287.0K | 0.00% | +9,334+23.6% | Added |
| MetLife Investment Management | 46,642 | $273.3K | 0.00% | 00.0% | Unchanged |
| Mirae Asset Global Investments Co., Ltd. | 45,521 | $266.8K | 0.00% | +11,734+34.7% | Added |
| Great West Life Assurance Co | 44,554 | $263.0K | 0.00% | +21,919+96.8% | Added |
| American International Group, Inc. | 43,781 | $256.6K | 0.00% | +988+2.3% | Added |
| Cornercap Investment Counsel Inc | 42,633 | $249.8K | 0.04% | 00.0% | Unchanged |
| Oversea-Chinese Banking CORP Ltd | 42,500 | $249.0K | 0.01% | +42,500 | New |
| Susquehanna International Group, LLP | 39,952 | $234.1K | 0.00% | −62,463−61.0% | Reduced |
| Tower Research Capital LLC (TRC) | 36,698 | $215.0K | 0.01% | +288+0.8% | Added |
| Corton Capital Inc. | 35,956 | $210.7K | 0.17% | +21,497+148.7% | Added |
| Manufacturers Life Insurance Company, The | 35,597 | $208.6K | 0.00% | +281+0.8% | Added |
| Legal & General Group Plc | 35,189 | $206.2K | 0.00% | +1,302+3.8% | Added |