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 |
|---|---|---|---|---|---|
| Capital Advisors, Ltd. LLC | 71 | $0 | 0.00% | 00.0% | Unchanged |
| GWM Advisors LLC | 500 | $3 | 0.00% | +500 | New |
| Ellevest, Inc. | 57 | $334 | 0.00% | 00.0% | Unchanged |
| Parallel Advisors, LLC | 78 | $457 | 0.00% | 00.0% | Unchanged |
| North Star Investment Management Corp. | 150 | $879 | 0.00% | 00.0% | Unchanged |
| Allspring Global Investments Holdings, LLC | 154 | $902 | 0.00% | 00.0% | Unchanged |
| Steward Partners Investment Advisory, LLC | 225 | $1.32K | 0.00% | +225 | New |
| Daiwa Securities Group Inc. | 401 | $2.00K | 0.00% | +155+63.0% | Added |
| Lindbrook Capital, LLC | 445 | $2.61K | 0.00% | 00.0% | Unchanged |
| Nisa Investment Advisors, LLC | 610 | $4.00K | 0.00% | −82−11.8% | Reduced |
| China Universal Asset Management Co., Ltd. | 1,014 | $5.94K | 0.00% | +104+11.4% | Added |
| Cutler Group LP | 1,200 | $7.00K | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 2,500 | $14.0K | 0.00% | 00.0% | Unchanged |
| Dorsey Wright & Associates | 2,988 | $17.5K | 0.01% | +2,988 | New |
| Simplex Trading, LLC | 3,090 | $18.0K | 0.00% | +1,845+148.2% | Added |
| Advisor Group Holdings, Inc. | 3,235 | $19.0K | 0.00% | 00.0% | Unchanged |
| Metropolitan Life Insurance Co | 6,508 | $38.1K | 0.00% | +1,750+36.8% | Added |
| Balyasny Asset Management LLC | 6,597 | $38.7K | 0.00% | −56,930−89.6% | Reduced |
| Ameritas Investment Partners, Inc. | 7,067 | $46.1K | 0.00% | 00.0% | Unchanged |
| Point72 Middle East FZE | 9,566 | $56.1K | 0.00% | +9,566 | New |
| Empirical Asset Management, LLC | 10,000 | $58.6K | 0.06% | 00.0% | Unchanged |
| HRT Financial LP | 11,210 | $65.0K | 0.00% | −101,603−90.1% | Reduced |
| Janus Henderson Group PLC | 11,341 | $66.5K | 0.00% | −10.0% | Reduced |
| Pictet Asset Management SA | 11,490 | $67.0K | 0.00% | +11,490 | New |
| ExodusPoint Capital Management, LP | 11,799 | $69.0K | 0.00% | −145,612−92.5% | Reduced |
| Amalgamated Bank | 11,816 | $69.0K | 0.00% | +365+3.2% | Added |
| Martingale Asset Management L P | 12,110 | $71.0K | 0.00% | 00.0% | Unchanged |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 12,247 | $71.8K | 0.00% | +4,985+68.6% | Added |
| Royal Bank of Canada | 13,165 | $76.0K | 0.00% | +10,376+372.0% | Added |
| Two Sigma Securities, LLC | 15,226 | $89.2K | 0.01% | +15,226 | New |
| Grimes & Company, Inc. | 15,267 | $89.5K | 0.00% | +95+0.6% | Added |
| Man Group plc | 15,963 | $93.5K | 0.00% | +15,963 | New |
| Public Employees Retirement System of Ohio | 18,175 | $107.0K | 0.00% | −4,125−18.5% | Reduced |
| Raymond James & Associates | 19,431 | $113.9K | 0.00% | +19,431 | New |
| Virtus ETF Advisers LLC | 19,618 | $115.0K | 0.06% | −15,430−44.0% | Reduced |
| ProShare Advisors LLC | 20,161 | $118.1K | 0.00% | +2,051+11.3% | Added |
| Bank of Montreal | 16,704 | $119.3K | 0.00% | +35+0.2% | Added |
| E Fund Management Co., Ltd. | 21,844 | $128.0K | 0.01% | +7,149+48.6% | Added |
| Principal Financial Group Inc | 21,867 | $128.1K | 0.00% | +2,947+15.6% | Added |
| Arizona State Retirement System | 21,935 | $128.5K | 0.00% | +849+4.0% | Added |
| Boulder Hill Capital Management LP | 23,000 | $134.8K | 0.11% | +23,000 | New |
| Jasper Ridge Partners, L.P. | 23,100 | $135.4K | 0.01% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 23,409 | $137.2K | 0.00% | +2,007+9.4% | Added |
| Prio Wealth Limited Partnership | 23,529 | $137.9K | 0.01% | 00.0% | Unchanged |
| Teacher Retirement System of Texas | 23,612 | $138.0K | 0.00% | −1,902−7.5% | Reduced |
| Dynamic Technology Lab Private Ltd | 24,533 | $144.0K | 0.01% | −7,165−22.6% | Reduced |
| Fox Run Management, L.L.C. | 24,652 | $144.5K | 0.06% | +12,567+104.0% | Added |
| Ameriprise Financial Inc | 27,044 | $158.0K | 0.00% | −326−1.2% | Reduced |
| State Board of Administration of Florida Retirement System | 27,402 | $160.6K | 0.00% | +110+0.4% | Added |
| Gsa Capital Partners LLP | 32,241 | $189.0K | 0.02% | −134,751−80.7% | Reduced |
| Delphia (USA) Inc. | 33,037 | $193.6K | 0.22% | +18,309+124.3% | Added |
| Invesco Ltd. | 33,273 | $195.0K | 0.00% | −528,001−94.1% | Reduced |
| Legal & General Group Plc | 35,189 | $206.2K | 0.00% | +1,302+3.8% | Added |
| Manufacturers Life Insurance Company, The | 35,597 | $208.6K | 0.00% | +281+0.8% | Added |
| Corton Capital Inc. | 35,956 | $210.7K | 0.17% | +21,497+148.7% | Added |
| Tower Research Capital LLC (TRC) | 36,698 | $215.0K | 0.01% | +288+0.8% | Added |
| Susquehanna International Group, LLP | 39,952 | $234.1K | 0.00% | −62,463−61.0% | Reduced |
| Oversea-Chinese Banking CORP Ltd | 42,500 | $249.0K | 0.01% | +42,500 | New |
| Cornercap Investment Counsel Inc | 42,633 | $249.8K | 0.04% | 00.0% | Unchanged |
| American International Group, Inc. | 43,781 | $256.6K | 0.00% | +988+2.3% | Added |
| Great West Life Assurance Co | 44,554 | $263.0K | 0.00% | +21,919+96.8% | Added |
| Mirae Asset Global Investments Co., Ltd. | 45,521 | $266.8K | 0.00% | +11,734+34.7% | Added |
| MetLife Investment Management | 46,642 | $273.3K | 0.00% | 00.0% | Unchanged |
| SG Americas Securities, LLC | 48,931 | $287.0K | 0.00% | +9,334+23.6% | Added |
| Los Angeles Capital Management LLC | 51,065 | $299.2K | 0.00% | −61,460−54.6% | Reduced |
| New York State Common Retirement Fund | 55,981 | $328.0K | 0.00% | −200.0% | Reduced |
| Engineers Gate Manager LP | 56,002 | $328.2K | 0.02% | −2,498−4.3% | Reduced |
| Alpha Paradigm Partners, LLC | 58,578 | $343.0K | 0.14% | +58,578 | New |
| Algert Global LLC | 58,658 | $343.7K | 0.02% | 00.0% | Unchanged |
| Prudential Financial Inc | 58,705 | $344.0K | 0.00% | −44,050−42.9% | Reduced |
| Harvest Investment Services, LLC | 59,563 | $349.0K | 0.37% | +4,565+8.3% | Added |
| Allianz Asset Management GmbH | 60,100 | $352.2K | 0.00% | 00.0% | Unchanged |
| Thrivent Financial for Lutherans | 60,922 | $357.0K | 0.00% | +60,922 | New |
| Skandinaviska Enskilda Banken AB (publ) | 61,322 | $359.0K | 0.00% | +61,322 | New |
| QVT Financial LP | 62,657 | $367.2K | 0.02% | 00.0% | Unchanged |
| Jump Financial, LLC | 64,613 | $378.6K | 0.02% | +20,015+44.9% | Added |
| Alps Advisors Inc | 67,736 | $396.9K | 0.00% | +67,736 | New |
| State of Wisconsin Investment Board | 72,898 | $427.2K | 0.00% | −64,872−47.1% | Reduced |
| Mackenzie Financial Corp | 73,692 | $431.8K | 0.00% | +73,692 | New |
| Voloridge Investment Management, LLC | 75,216 | $440.8K | 0.00% | −4,248−5.3% | Reduced |
| Occudo Quantitative Strategies LP | 81,538 | $477.8K | 0.06% | −30,488−27.2% | Reduced |
| Healthcare of Ontario Pension Plan Trust Fund | 84,000 | $492.2K | 0.00% | −78,700−48.4% | Reduced |
| Qube Research & Technologies Ltd | 86,386 | $506.2K | 0.00% | +31,297+56.8% | Added |
| Credit Suisse AG | 97,474 | $571.2K | 0.00% | −5,193−5.1% | Reduced |
| Squarepoint Ops LLC | 97,556 | $571.7K | 0.00% | +82,170+534.1% | Added |
| Alliancebernstein L.P. | 99,700 | $584.2K | 0.00% | 00.0% | Unchanged |
| UBS Asset Management Americas Inc | 102,575 | $601.1K | 0.00% | +14,201+16.1% | Added |
| AXA S.A. | 104,100 | $610.0K | 0.00% | −128,700−55.3% | Reduced |
| California State Teachers Retirement System | 104,473 | $612.2K | 0.00% | +2,129+2.1% | Added |
| Price T Rowe Associates Inc | 120,519 | $707.0K | 0.00% | +8,480+7.6% | Added |
| BNP Paribas Arbitrage, SA | 122,676 | $718.9K | 0.00% | −114,989−48.4% | Reduced |
| FMR LLC | 123,377 | $723.0K | 0.00% | −92,344−42.8% | Reduced |
| XTX Topco Ltd | 132,904 | $778.8K | 0.17% | +69,561+109.8% | Added |
| AQR Capital Management LLC | 135,201 | $792.3K | 0.00% | +44,788+49.5% | Added |
| Macquarie Group Ltd | 150,000 | $879.0K | 0.00% | −3,793−2.5% | Reduced |
| Rhumbline Advisers | 152,965 | $896.0K | 0.00% | +5,264+3.6% | Added |
| Trexquant Investment LP | 157,731 | $924.3K | 0.03% | +62,781+66.1% | Added |
| Swiss National Bank | 187,696 | $1.10M | 0.00% | +3,700+2.0% | Added |
| Panagora Asset Management Inc | 190,963 | $1.12M | 0.01% | +4,186+2.2% | Added |
| Citigroup Inc | 193,472 | $1.13M | 0.00% | −3,805−1.9% | Reduced |