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 2021
Institutional positions in Mersana Therapeutics, Inc. as of Jun 30, 2021. 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
- 131
- −1 vs. Q1 2021
- Shares held
- 70.6M
- +496.4K (+0.7%) vs. Q1 2021
- Total value
- $957.8M
- −$186.5M (−16.3%) vs. Q1 2021
- New holders
- 18
- 51 more added
- Sold out
- 19
- 40 more reduced
Compare with Q1 2021: 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 2021
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q1 2021.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| Walleye Trading LLC | 15,200 | $206.0K | 0.01% | +15,200 | New |
| Virtus ETF Advisers LLC | 14,912 | $203.0K | 0.08% | +3,141+26.7% | Added |
| Arizona State Retirement System | 14,896 | $202.0K | 0.00% | −1,056−6.6% | Reduced |
| XTX Topco Ltd | 14,541 | $197.0K | 0.07% | +14,541 | New |
| Allstate Corp | 13,996 | $190.0K | 0.01% | +319+2.3% | Added |
| Legal & General Group Plc | 14,006 | $190.0K | 0.00% | +909+6.9% | Added |
| The PNC Financial Services Group, Inc. | 13,118 | $178.0K | 0.00% | −2,100−13.8% | Reduced |
| AQR Capital Management LLC | 12,330 | $167.0K | 0.00% | −34,085−73.4% | Reduced |
| Amalgamated Bank | 12,021 | $163.0K | 0.00% | +12,021 | New |
| Bridgefront Capital, LLC | 11,236 | $153.0K | 0.06% | +11,236 | New |
| Nelson, Van Denburg & Campbell Wealth Management Group, LLC | 11,247 | $152.0K | 0.02% | +713+6.8% | Added |
| Tudor Investment Corp Et Al | 10,449 | $142.0K | 0.00% | +10,449 | New |
| Zurcher Kantonalbank (Zurich Cantonalbank) | 10,081 | $137.0K | 0.00% | +134+1.3% | Added |
| Point72 Hong Kong Ltd | 8,853 | $120.0K | 0.01% | +6,077+218.9% | Added |
| Tower Research Capital LLC (TRC) | 5,825 | $79.0K | 0.00% | −2,676−31.5% | Reduced |
| First Mercantile Trust Co | 5,766 | $78.0K | 0.01% | −371−6.0% | Reduced |
| Cutler Group LP | 5,800 | $78.0K | 0.01% | +2,200+61.1% | Added |
| Ameritas Investment Partners, Inc. | 5,400 | $73.0K | 0.00% | +864+19.0% | Added |
| Royal Bank of Canada | 4,715 | $64.0K | 0.00% | +722+18.1% | Added |
| Nisa Investment Advisors, LLC | 3,660 | $50.0K | 0.00% | −5,850−61.5% | Reduced |
| Great West Life Assurance Co | 3,638 | $49.0K | 0.00% | 00.0% | Unchanged |
| BNP Paribas Arbitrage, SA | 2,500 | $34.0K | 0.00% | −4,446−64.0% | Reduced |
| Penserra Capital Management LLC | 1,585 | $21.0K | 0.00% | +20+1.3% | Added |
| Advisor Group Holdings, Inc. | 814 | $11.0K | 0.00% | +533+189.7% | Added |
| O'Shaughnessy Asset Management, LLC | 651 | $9.00K | 0.00% | −3,012−82.2% | Reduced |
| Dark Forest Capital Management LP | 607 | $8.00K | 0.00% | +607 | New |
| Captrust Financial Advisors | 428 | $6.00K | 0.00% | 00.0% | Unchanged |
| Panagora Asset Management Inc | 231 | $3.00K | 0.00% | −17,752−98.7% | Reduced |
| Simplex Trading, LLC | 273 | $3.00K | 0.00% | −755−73.4% | Reduced |
| Daiwa Securities Group Inc. | 129 | $2.00K | 0.00% | 00.0% | Unchanged |
| Wells Fargo & Company | 52 | $1.00K | 0.00% | −21,295−99.8% | Reduced |
| Putnam Investments LLC | 0 | $0 | 0.00% | −720,800−100.0% | Sold out |
| Acuta Capital Partners, LLC | 0 | $0 | 0.00% | −357,689−100.0% | Sold out |
| Marshall Wace North America L.P. | 0 | $0 | 0.00% | −215,391−100.0% | Sold out |
| Teacher Retirement System of Texas | 0 | $0 | 0.00% | −122,938−100.0% | Sold out |
| California Public Employees Retirement System | 0 | $0 | 0.00% | −108,200−100.0% | Sold out |
| First Trust Advisors LP | 0 | $0 | 0.00% | −59,685−100.0% | Sold out |
| HRT Financial LP | 0 | $0 | 0.00% | −31,899−100.0% | Sold out |
| Old Mission Capital LLC | 0 | $0 | 0.00% | −25,761−100.0% | Sold out |
| Jump Financial, LLC | 0 | $0 | 0.00% | −25,332−100.0% | Sold out |
| Balyasny Asset Management LLC | 0 | $0 | 0.00% | −19,636−100.0% | Sold out |
| Victory Capital Management Inc | 0 | $0 | 0.00% | −18,877−100.0% | Sold out |
| Ergoteles LLC | 0 | $0 | 0.00% | −13,600−100.0% | Sold out |
| Quantitative Systematic Strategies LLC | 0 | $0 | 0.00% | −13,169−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −12,496−100.0% | Sold out |
| Alpine Global Management, LLC | 0 | $0 | 0.00% | −10,658−100.0% | Sold out |
| Group One Trading, L.P. | 0 | $0 | 0.00% | −8,870−100.0% | Sold out |
| Pacer Advisors, Inc. | 0 | $0 | 0.00% | −4,328−100.0% | Sold out |
| Bank of Montreal | 0 | $0 | 0.00% | −1,511−100.0% | Sold out |
| TCI Wealth Advisors, Inc. | 0 | $0 | 0.00% | −106−100.0% | Sold out |