Mersana Therapeutics Inc.
13F holders, Q4 2025 (December 31)3holders −4
0new positions
4sold out
$28.93avg. 13F price*
At the end of Q4 2025, 3 institutions reported holding Mersana Therapeutics Inc. in their 13F filings, down 4 from Q3 2025. 0 opened new positions and 4 sold out. The largest holders were Essential Partners LLC ($2K), EverSource Wealth Advisors, LLC ($318) and North Star Investment Management Corp. ($174).
- Company
- Mersana Therapeutics Inc.
- CUSIP
- 59045L106
- Latest filing quarter
- Q4 2025
History
Number of 13F holders
Total Exit/New Position Q3 2025 → Q4 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 0 | $0 |
| Exits | 4 | $411K |
All 13F filers, Q3 2025 → Q4 2025: 56,025 shares sold, net −56,025 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 3 holders
| Essential Partners LLC | 0.00% | Reduce -29.3% | 82 | $2K |
| EverSource Wealth Advisors, LLC | 0.00% | Reduce -21.4% | 11 | $318 |
| North Star Investment Management Corp. | 0.00% | No change | 6 | $174 |
"% of holder's portfolio" is MERSANA THERAPEUTICS INC's weight in each manager's 13F, not the share of Mersana Therapeutics Inc. the manager owns.