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 2025
Institutional positions in Mersana Therapeutics, Inc. as of Jun 30, 2025. 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
- 85
- −26 vs. Q1 2025
- Shares held
- 77.4M
- −10.4M (−11.9%) vs. Q1 2025
- Total value
- $22.9M
- −$7.31M (−24.2%) vs. Q1 2025
- New holders
- 14
- 23 more added
- Sold out
- 40
- 30 more reduced
Compare with Q1 2025: 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 2025
Shares, value and share of portfolio for each institution holding Mersana Therapeutics, Inc.; share changes are against Q1 2025.
| Institution | Shares | Value | % of portfolio | Change in shares | Action |
|---|---|---|---|---|---|
| New York State Common Retirement Fund | 0 | $0 | 0.00% | −37,235−100.0% | Sold out |
| SG Americas Securities, LLC | 0 | $0 | 0.00% | −35,527−100.0% | Sold out |
| State Board of Administration of Florida Retirement System | 0 | $0 | 0.00% | −28,800−100.0% | Sold out |
| ProShare Advisors LLC | 0 | $0 | 0.00% | −28,784−100.0% | Sold out |
| Mercer Global Advisors Inc | 0 | $0 | 0.00% | −24,077−100.0% | Sold out |
| CIBC World Markets Corp | 0 | $0 | 0.00% | −23,791−100.0% | Sold out |
| Police & Firemen's Retirement System of New Jersey | 0 | $0 | 0.00% | −22,593−100.0% | Sold out |
| Buckingham Strategic Partners | 0 | $0 | 0.00% | −19,485−100.0% | Sold out |
| Manufacturers Life Insurance Company, The | 0 | $0 | 0.00% | −17,374−100.0% | Sold out |
| NorthCrest Asset Manangement, LLC | 0 | $0 | 0.00% | −16,069−100.0% | Sold out |
| Grimes & Company, Inc. | 0 | $0 | 0.00% | −14,069−100.0% | Sold out |
| Abel Hall, LLC | 0 | $0 | 0.00% | −13,662−100.0% | Sold out |
| Legal & General Group Plc | 0 | $0 | 0.00% | −11,097−100.0% | Sold out |
| Principal Financial Group Inc | 0 | $0 | 0.00% | −10,354−100.0% | Sold out |
| Victory Capital Management Inc | 0 | $0 | 0.00% | −10,339−100.0% | Sold out |
| Voya Investment Management LLC | 0 | $0 | 0.00% | −10,123−100.0% | Sold out |
| Ameritas Investment Partners, Inc. | 0 | $0 | 0.00% | −9,896−100.0% | Sold out |
| STRS Ohio | 0 | $0 | 0.00% | −8,700−100.0% | Sold out |
| California State Teachers Retirement System | 0 | $0 | 0.00% | −8,220−100.0% | Sold out |
| Amalgamated Bank | 0 | $0 | 0.00% | −3,769−100.0% | Sold out |
| Simplex Trading, LLC | 0 | $0 | 0.00% | −3,424−100.0% | Sold out |
| Coldstream Capital Management Inc | 0 | $0 | 0.00% | −1,095−100.0% | Sold out |
| Sterling Capital Management LLC | 0 | $0 | 0.00% | −944−100.0% | Sold out |
| True Wealth Design, LLC | 0 | $0 | 0.00% | −289−100.0% | Sold out |
| Frazier Financial Advisors, LLC | 0 | $0 | 0.00% | −5−100.0% | Sold out |