Mersana TherapeuticsMRSN
13F holders, Q2 2025 (June 30)2holders
$0.30avg. 13F price*
At the end of Q2 2025, 2 institutions reported holding Mersana Therapeutics Inc. (MRSN) in their 13F filings. The largest holders were Marshall Wace, LLP ($68K) and SBI Securities Co., Ltd. ($405).
- Company
- Mersana Therapeutics Inc.
- CUSIP
- 59045L205
- Latest filing quarter
- Q1 2026
History
Number of 13F holders
Total Exit/New Position Q2 2025
| Institutions | Total Value | |
|---|---|---|
| New Positions | 2 | $68K |
| Exits | 0 | $0 |
Ownership 2 holders
| Marshall Wace, LLP | 0.00% | New | 226,971 | $68K |
| SBI Securities Co., Ltd. | 0.00% | New | 1,368 | $405 |
"% of holder's portfolio" is MRSN's weight in each manager's 13F, not the share of Mersana Therapeutics Inc. the manager owns.