Mersana Therapeutics, Inc.
Mersana Therapeutics, Inc. (MRSN) Insider Trading
Form 4 buy vs sell counts, ratio, and sentiment — switch this quarter or last 12 months; chart and transactions below.
SEC EDGAR · FMP · MRSN · as of Jun 9, 2026
Activity summary
Buy transactions
0
P-Purchase only
Sell transactions
2
12 Months
Buy/Sell ratio
0.00
Buy/Sell (by trades)
Overall sentiment
Mersana Therapeutics, Inc. insiders have been primarily selling shares over the past 12 Months. Selling activity is often driven by pre-scheduled Rule 10b5-1 plans rather than negative sentiment toward the company.
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · Buy = P-Purchase only · Sell = S-Sale only
As of Jun 9, 2026
MRSN insider buying and selling by quarter
MRSN insider selling · MRSN insider buying stocks · quarterly insider activity
Mobile shows last 4Q · Desktop shows full 8Q
▸ Source: SEC EDGAR · Form 3 & 4 · via Financial Modeling Prep · last 8 quarters
As of Jun 9, 2026
Active insiders
Most active in past 12 months · MRSN ceo insider trading
Showing all insiders · Click a card to filter the transactions table below
▸ Aggregated from reportingName · top 5 by trade count (12M) · no extra API
Recent insider transactions
MRSN executive sell shares · MRSN board member insider trading · MRSN insider trading SEC filing
Scroll horizontally to see all columns
| Date | Insider | Type | Shares | Value | Filing |
|---|---|---|---|---|---|
| Jan 6, 2026 | Hack Andrew A. F. Director | Other | 346,545 | $35 | Form 4 |
| Jan 6, 2026 | Hege Kristen Director | Other | 578 | $0 | Form 4 |
| Jan 6, 2026 | Diaz Allene M. Director | Other | 578 | $0 | Form 4 |
| Jan 6, 2026 | Dere Willard H Director | Other | 1,567 | $0 | Form 4 |
| Jan 6, 2026 | Carvajal Alejandra SVP, Chief Legal Officer | Other | 3,131 | $0 | Form 4 |
| Jan 6, 2026 | Bala Mohan SVP, Chief Development | Other | 2,927 | $0 | Form 4 |
| Jan 6, 2026 | Alleva Lawrence M Director | Other | 84 | $0 | Form 4 |
| Jan 6, 2026 | Huber Martin H. Jr. President, CEO · Director | Other | 9,573 | $1 | Form 4 |
Carvajal Alejandra
SVP, Chief Legal Officer
Date
Jan 6
Shares
3,131
Price
$0.00
Value
$0
Huber Martin H. Jr.
President, CEO · Director
Date
Jan 6
Shares
9,573
Price
$0.00
Value
$1
▸ Source: SEC EDGAR · Form 4 filings · ⚡ = value ≥ $1M · Award/Option price shows —
About MRSN insider trading
MRSN insider trades
Mersana Therapeutics, Inc. (MRSN) insider trading data is sourced from SEC Form 4 filings submitted by corporate insiders, including Hack Andrew A. F. (Director), Hege Kristen (Director), Diaz Allene M. (Director). Over the past 12 months, 5 insiders have filed transactions with the SEC. MRSN insiders have been primarily selling, which may reflect pre-scheduled Rule 10b5-1 plan executions.
For Mersana Therapeutics, Inc.'s institutional ownership breakdown and insider ownership percentage, see the Ownership tab → Ownership tab →
Frequently asked questions
MRSN insider trading · 5 questionsThe insiders of Mersana Therapeutics, Inc. (MRSN) include executives and directors such as Hack Andrew A. F. (Director), Hege Kristen (Director), Diaz Allene M. (Director), among others. Over the past 12 months, 5 insiders have filed Form 4 transactions with the SEC. Insider transactions are required to be reported within 2 business days of the trade date.
▸ Source: FMP /stable/insider-trading/search · SEC EDGAR Form 3 & 4 · acquisitionOrDisposition A=Buy, D=Sell · RSU vesting (M-Exempt) excluded from sentiment bar · As of Jun 9, 2026