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 2024
Institutional positions in Mersana Therapeutics, Inc. as of Sep 30, 2024. 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
- 116
- −4 vs. Q2 2024
- Shares held
- 116.1M
- +10.6M (+10.0%) vs. Q2 2024
- Total value
- $219.4M
- +$7.36M (+3.5%) vs. Q2 2024
- New holders
- 13
- 38 more added
- Sold out
- 17
- 33 more reduced
2 institutions that held it in Q2 2024 haven't filed for Q3 2024 yet. Not filing isn't selling, so they aren't counted as sold out or in the changes above.
Compare with Q2 2024: 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 2024
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q2 2024.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| CWM, LLC | 125 | $0 | 0.00% | +76+155.1% | Added |
| Farther Finance Advisors, LLC | 1 | $2 | 0.00% | 00.0% | Unchanged |
| Frazier Financial Advisors, LLC | 5 | $10 | 0.00% | 00.0% | Unchanged |
| Capital Performance Advisors LLP | 11 | $21 | 0.00% | +11 | New |
| North Star Investment Management Corp. | 150 | $284 | 0.00% | 00.0% | Unchanged |
| Jones Financial Companies LLLP | 200 | $370 | 0.00% | +200 | New |
| The PNC Financial Services Group, Inc. | 200 | $378 | 0.00% | 00.0% | Unchanged |
| Sterling Capital Management LLC | 234 | $442 | 0.00% | +234 | New |
| Nordwand Advisors, LLC | 1,500 | $2.83K | 0.00% | 00.0% | Unchanged |
| Catalyst Funds Management Pty Ltd | 1,700 | $3.21K | 0.00% | 00.0% | Unchanged |
| Picton Mahoney Asset Management | 2,494 | $4.00K | 0.00% | +1,824+272.2% | Added |
| Nisa Investment Advisors, LLC | 3,131 | $5.92K | 0.00% | −14,669−82.4% | Reduced |
| Advisor Group Holdings, Inc. | 3,432 | $6.49K | 0.00% | −44−1.3% | Reduced |
| Amalgamated Bank | 3,769 | $7.00K | 0.00% | 00.0% | Unchanged |
| Tower Research Capital LLC (TRC) | 4,363 | $8.25K | 0.00% | −36,397−89.3% | Reduced |
| Smartleaf Asset Management LLC | 5,252 | $9.72K | 0.00% | +3,341+174.8% | Added |
| California State Teachers Retirement System | 8,220 | $15.5K | 0.00% | 00.0% | Unchanged |
| STRS Ohio | 8,700 | $16.4K | 0.00% | 00.0% | Unchanged |
| Ameritas Investment Partners, Inc. | 9,896 | $18.7K | 0.00% | 00.0% | Unchanged |
| Hunter Perkins Capital Management, LLC | 10,000 | $19.0K | 0.00% | 00.0% | Unchanged |
| Caption Management, LLC | 10,200 | $19.3K | 0.00% | 00.0% | Unchanged |
| Russell Investments Group, Ltd. | 10,765 | $20.3K | 0.00% | +1,249+13.1% | Added |
| Legal & General Group Plc | 11,097 | $21.0K | 0.00% | 00.0% | Unchanged |
| Victory Capital Management Inc | 11,458 | $21.7K | 0.00% | −415−3.5% | Reduced |
| Royal Bank of Canada | 11,455 | $22.0K | 0.00% | +785+7.4% | Added |
| HSBC Holdings PLC | 13,965 | $25.7K | 0.00% | +1,439+11.5% | Added |
| Grimes & Company, Inc. | 14,998 | $28.3K | 0.00% | 00.0% | Unchanged |
| US Bancorp | 16,178 | $30.6K | 0.00% | +16,178 | New |
| Dynamic Technology Lab Private Ltd | 18,095 | $34.0K | 0.00% | +18,095 | New |
| Public Employees Retirement System of Ohio | 20,587 | $38.9K | 0.00% | 00.0% | Unchanged |
| ProShare Advisors LLC | 21,435 | $40.5K | 0.00% | +6,585+44.3% | Added |
| Jasper Ridge Partners, L.P. | 23,100 | $43.7K | 0.00% | 00.0% | Unchanged |
| Prio Wealth Limited Partnership | 23,529 | $44.5K | 0.00% | 00.0% | Unchanged |
| Acadian Asset Management LLC | 24,394 | $46.0K | 0.00% | −47,112−65.9% | Reduced |
| Atom Investors LP | 24,661 | $46.6K | 0.00% | −340,774−93.3% | Reduced |
| Intech Investment Management LLC | 27,342 | $51.7K | 0.00% | +27,342 | New |
| State Board of Administration of Florida Retirement System | 28,800 | $54.4K | 0.00% | 00.0% | Unchanged |
| Quarry LP | 30,000 | $56.7K | 0.02% | +30,000 | New |
| Walleye Trading LLC | 31,526 | $59.6K | 0.00% | 00.0% | Unchanged |
| Group One Trading, L.P. | 32,570 | $61.6K | 0.00% | +9,100+38.8% | Added |
| MetLife Investment Management | 33,916 | $64.1K | 0.00% | −31,667−48.3% | Reduced |
| New York State Common Retirement Fund | 37,235 | $70.4K | 0.00% | 00.0% | Unchanged |
| Voya Investment Management LLC | 38,301 | $72.4K | 0.00% | −287−0.7% | Reduced |
| Graham Capital Management, L.P. | 42,417 | $80.2K | 0.00% | −8,553−16.8% | Reduced |
| Manufacturers Life Insurance Company, The | 44,473 | $84.1K | 0.00% | −2,014−4.3% | Reduced |
| Ameriprise Financial Inc | 45,647 | $86.3K | 0.00% | +100+0.2% | Added |
| Wells Fargo & Company | 48,115 | $90.9K | 0.00% | +845+1.8% | Added |
| Invesco Ltd. | 55,483 | $104.9K | 0.00% | +10,427+23.1% | Added |
| Corebridge Financial, Inc. | 60,655 | $114.6K | 0.00% | −375−0.6% | Reduced |
| QVT Financial LP | 62,657 | $118.4K | 0.01% | 00.0% | Unchanged |
| Mirae Asset Global ETFs Holdings Ltd. | 63,124 | $119.3K | 0.00% | +6,179+10.9% | Added |
| Algert Global LLC | 63,483 | $120.0K | 0.00% | +18,828+42.2% | Added |
| Simplex Trading, LLC | 72,844 | $137.0K | 0.00% | +34,183+88.4% | Added |
| Susquehanna International Group, LLP | 74,809 | $141.4K | 0.00% | −34,050−31.3% | Reduced |
| Squarepoint Ops LLC | 81,629 | $154.3K | 0.00% | −171,175−67.7% | Reduced |
| Citigroup Inc | 82,312 | $155.6K | 0.00% | +56,746+222.0% | Added |
| Susquehanna Portfolio Strategies, LLC | 82,713 | $156.3K | 0.01% | −11,165−11.9% | Reduced |
| Exchange Traded Concepts, LLC | 85,006 | $160.7K | 0.00% | +41,586+95.8% | Added |
| SG Americas Securities, LLC | 87,233 | $165.0K | 0.00% | −51,489−37.1% | Reduced |
| Price T Rowe Associates Inc | 99,078 | $188.0K | 0.00% | 00.0% | Unchanged |
| Macquarie Group Ltd | 150,000 | $284.0K | 0.00% | 00.0% | Unchanged |
| Nuveen Asset Management, LLC | 151,201 | $285.8K | 0.00% | +27,862+22.6% | Added |
| Rhumbline Advisers | 166,846 | $315.3K | 0.00% | −9,217−5.2% | Reduced |
| 683 Capital Management, LLC | 182,793 | $345.5K | 0.04% | +182,793 | New |
| Federated Hermes, Inc. | 183,744 | $347.3K | 0.00% | −1,763−1.0% | Reduced |
| Alliancebernstein L.P. | 186,060 | $351.7K | 0.00% | 00.0% | Unchanged |
| Los Angeles Capital Management LLC | 189,660 | $358.5K | 0.00% | +14,240+8.1% | Added |
| Panagora Asset Management Inc | 233,209 | $440.8K | 0.00% | −3,016−1.3% | Reduced |
| BNP Paribas Arbitrage, SA | 237,198 | $448.3K | 0.00% | −98,881−29.4% | Reduced |
| Millennium Management LLC | 259,783 | $491.0K | 0.00% | −432,002−62.4% | Reduced |
| Gsa Capital Partners LLP | 271,774 | $514.0K | 0.04% | +213,814+368.9% | Added |
| FMR LLC | 277,740 | $524.9K | 0.00% | +32,332+13.2% | Added |
| Two Sigma Investments, LP | 300,222 | $567.4K | 0.00% | −448,468−59.9% | Reduced |
| Charles Schwab Investment Management Inc | 312,623 | $590.9K | 0.00% | −70.0% | Reduced |
| XTX Topco Ltd | 347,255 | $656.3K | 0.05% | +225,823+186.0% | Added |
| Prelude Capital Management, LLC | 364,727 | $689.3K | 0.05% | +364,727 | New |
| Bank of New York Mellon Corp | 372,173 | $703.4K | 0.00% | −80,656−17.8% | Reduced |
| Jane Street Group, LLC | 417,451 | $789.0K | 0.00% | +100,119+31.6% | Added |
| Woodline Partners LP | 433,552 | $819.4K | 0.01% | −1,033,759−70.5% | Reduced |
| UBS Group AG | 473,527 | $895.0K | 0.00% | +438,544+1,253.6% | Added |
| Two Sigma Advisers, LP | 486,800 | $920.1K | 0.00% | −232,500−32.3% | Reduced |
| Renaissance Technologies LLC | 492,719 | $931.2K | 0.00% | −955,500−66.0% | Reduced |
| Barclays PLC | 494,516 | $934.6K | 0.00% | +121,799+32.7% | Added |
| ClariVest Asset Management LLC | 500,498 | $1.01M | 0.10% | 00.0% | Unchanged |
| Balyasny Asset Management LLC | 535,819 | $1.01M | 0.00% | +535,819 | New |
| HealthInvest Partners AB | 538,621 | $1.02M | 0.48% | +353,721+191.3% | Added |
| UBS Oconnor LLC | 570,029 | $1.08M | 0.03% | +25,736+4.7% | Added |
| Wellington Management Group LLP | 618,305 | $1.17M | 0.00% | +85,439+16.0% | Added |
| Qube Research & Technologies Ltd | 877,043 | $1.66M | 0.00% | −115,522−11.6% | Reduced |
| Northern Trust Corp | 933,491 | $1.76M | 0.00% | +32,870+3.6% | Added |
| Bank of America Corp | 990,036 | $1.87M | 0.00% | +830,263+519.7% | Added |
| Octagon Capital Advisors LP | 992,000 | $1.87M | 0.30% | 00.0% | Unchanged |
| Jacobs Levy Equity Management, Inc | 993,046 | $1.88M | 0.01% | +507,453+104.5% | Added |
| D. E. Shaw & Co., Inc. | 1,022,455 | $1.93M | 0.00% | −443,125−30.2% | Reduced |
| Baker Bros. Advisors LP | 1,086,115 | $2.05M | 0.02% | 00.0% | Unchanged |
| Exome Asset Management LLC | 1,178,570 | $2.23M | 1.51% | +1,178,570 | New |
| Acuta Capital Partners, LLC | 1,200,000 | $2.27M | 1.84% | −463,000−27.8% | Reduced |
| Verition Fund Management LLC | 1,303,249 | $2.46M | 0.02% | +1,292,200+11,695.2% | Added |
| 5AM Venture Management, LLC | 1,305,000 | $2.47M | 0.51% | 00.0% | Unchanged |
| Morgan Stanley | 1,364,216 | $2.58M | 0.00% | −908,378−40.0% | Reduced |