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.
Q1 2026 vs. Q4 2025
How the institutions holding Mersana Therapeutics, Inc. changed between Q4 2025 and Q1 2026.
All holders in Q1 2026All holders in Q4 2025
| Measure | Q4 2025 | Of which not filed for Q1 2026 | Q1 2026 | Change |
|---|---|---|---|---|
| Holders | 51 | 1 | 1 | −49 |
| Shares | 2.24M | 210.3K | 3 | −2.03M (−100.0%) |
| Value | $64.8M | $6.08M | $87 | −$58.7M (−100.0%) |
1 institution that held it in Q4 2025 haven't filed for Q1 2026 yet. Not filing isn't selling, so the changes leave them out.
New holders (0)
Institutions that held Mersana Therapeutics, Inc. at the end of Q1 2026 but not at the end of Q4 2025.
None.
Sold out (49)
Institutions that held Mersana Therapeutics, Inc. at the end of Q4 2025 and filed for Q1 2026 without it.
Not filed for Q1 2026 yet (1)
Institutions that held Mersana Therapeutics, Inc. at the end of Q4 2025 and haven't filed a 13F for Q1 2026. Not filing isn't selling, so they aren't counted as sold out.
| Institution | Shares, Q4 2025 | Value, Q4 2025 |
|---|---|---|
| Vanguard Group Inc | 210,301 | $6.08M |