// company-profile
Mersana Therapeutics, Inc.
MRSNSectorPharmaceutical PreparationsInc.DEFilings104Insiders15
// api This Mersana Therapeutics, Inc. insider-trading data is served live by the Form4API insider trading API. Get the same data via API.
// activity-summary
No insider transactions in the last 30 days.
No insider activity recorded for MRSN in the last 90 days.
Institutional Ownership
Top 13F-HR holders of Mersana Therapeutics, Inc. as of 2026-03-31
Total reported AUM
$87
QoQ change
—
Reporting period
2026-03-31
#1
IFP Advisors, Inc
CIK 1641866
$87
3 shares
Data source: SEC Form 13F-HR filings. Joined with insider activity above — see who's loading up institutionally while insiders are trading. Full 13F-HR API →
Insider Transactions
Sourced from SEC EDGAR Form 4 filings. Updated hourly.
| Date | Insider | Company | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Jan 6, 2026 | Alleva Lawrence M | MRSN | U | 578 | — | — |
| Jan 6, 2026 | Alleva Lawrence M | MRSN | Disposition | 500 | — | — |
| Jan 6, 2026 | Alleva Lawrence M | MRSN | Disposition | 384 | — | — |
| Jan 6, 2026 | Alleva Lawrence M | MRSN | Disposition | 181 | — | — |
| Jan 6, 2026 | Alleva Lawrence M | MRSN | Disposition | 358 | — | — |
45 more transactions hidden
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