MRSN

Mersana Therapeutics, Inc.

Total Trades

105

Buys

Sells

Largest Trade

N/A

Insiders

Institutional Funds

Inst. Value

$1M+

Activist Filings

Insider Trades

Insider	Title	Type	Value	Shares	Price	Date
Bala Mohan	SVP	SELL	<$1K	77	$9.90	Oct 28, 2025
Bala Mohan	SVP	EXERCISE	N/A	250	—	Oct 28, 2025
Huber Martin H. Jr.	President, CEO	EXERCISE	N/A	7K	—	Sep 15, 2025
Huber Martin H. Jr.	President, CEO	SELL	$1K–$15K	2K	$7.31	Sep 15, 2025
Mandelia Ashish	VP	SELL	$1K–$15K	4K	$0.58	Jan 18, 2025
Mandelia Ashish	VP	EXERCISE	N/A	9K	—	Jan 18, 2025
Protopapas Anna	Director	EXERCISE	N/A	21K	—	Jan 18, 2025
Protopapas Anna	Director	SELL	$1K–$15K	9K	$0.58	Jan 18, 2025
Lowinger Timothy B	SVP	SELL	$1K–$15K	8K	$0.58	Jan 18, 2025
Lowinger Timothy B	SVP	EXERCISE	N/A	20K	—	Jan 18, 2025
Huber Martin H. Jr.	President, CEO	SELL	$1K–$15K	5K	$0.58	Jan 18, 2025
Huber Martin H. Jr.	President, CEO	EXERCISE	N/A	11K	—	Jan 18, 2025
DeSchuytner Brian	SVP, COO & CFO	SELL	$1K–$15K	8K	$0.58	Jan 18, 2025
DeSchuytner Brian	SVP, COO & CFO	EXERCISE	N/A	21K	—	Jan 18, 2025
Carvajal Alejandra	SVP	EXERCISE	N/A	13K	—	Jan 18, 2025
Carvajal Alejandra	SVP	SELL	$1K–$15K	5K	$0.58	Jan 18, 2025
Bala Mohan	SVP	SELL	$1K–$15K	6K	$0.58	Jan 18, 2025
Bala Mohan	SVP	EXERCISE	N/A	15K	—	Jan 18, 2025
Protopapas Anna	Director	EXERCISE	N/A	17K	—	Jan 16, 2025
Protopapas Anna	Director	SELL	$1K–$15K	6K	$0.63	Jan 16, 2025
Mandelia Ashish	VP	SELL	$1K–$15K	2K	$0.63	Jan 16, 2025
Mandelia Ashish	VP	EXERCISE	N/A	5K	—	Jan 16, 2025
Lowinger Timothy B	SVP	EXERCISE	N/A	5K	—	Jan 16, 2025
Lowinger Timothy B	SVP	SELL	$1K–$15K	2K	$0.63	Jan 16, 2025
DeSchuytner Brian	SVP, COO & CFO	EXERCISE	N/A	6K	—	Jan 16, 2025
DeSchuytner Brian	SVP, COO & CFO	SELL	$1K–$15K	2K	$0.63	Jan 16, 2025
Carvajal Alejandra	SVP	SELL	<$1K	952	$0.63	Jan 16, 2025
Carvajal Alejandra	SVP	EXERCISE	N/A	3K	—	Jan 16, 2025
Protopapas Anna	Director	SELL	$1K–$15K	12K	$0.66	Jan 16, 2025
Protopapas Anna	Director	EXERCISE	N/A	31K	—	Jan 16, 2025
Mandelia Ashish	VP	EXERCISE	N/A	3K	—	Jan 16, 2025
Mandelia Ashish	VP	SELL	<$1K	1K	$0.66	Jan 16, 2025
Lowinger Timothy B	SVP	EXERCISE	N/A	9K	—	Jan 16, 2025
Lowinger Timothy B	SVP	SELL	$1K–$15K	3K	$0.66	Jan 16, 2025
DeSchuytner Brian	SVP, COO & CFO	EXERCISE	N/A	10K	—	Jan 16, 2025
DeSchuytner Brian	SVP, COO & CFO	SELL	$1K–$15K	4K	$0.66	Jan 16, 2025
Carvajal Alejandra	SVP	EXERCISE	N/A	9K	—	Jan 16, 2025
Carvajal Alejandra	SVP	SELL	$1K–$15K	3K	$0.66	Jan 16, 2025
Bala Mohan	SVP	SELL	$1K–$15K	3K	$0.66	Jan 16, 2025
Bala Mohan	SVP	EXERCISE	N/A	9K	—	Jan 16, 2025
Bala Mohan	SVP	SELL	$1K–$15K	2K	$1.90	Oct 29, 2024
Bala Mohan	SVP	EXERCISE	N/A	6K	—	Oct 29, 2024
DeSchuytner Brian	SVP, COO & CFO	EXERCISE	N/A	50K	—	Oct 7, 2024
DeSchuytner Brian	SVP, COO & CFO	SELL	$15K–$50K	14K	$1.98	Oct 7, 2024
Carvajal Alejandra	SVP	EXERCISE	N/A	50K	—	Oct 7, 2024
Carvajal Alejandra	SVP	SELL	$15K–$50K	14K	$1.98	Oct 7, 2024
Bala Mohan	SVP	SELL	$15K–$50K	14K	$1.98	Oct 7, 2024
Bala Mohan	SVP	EXERCISE	N/A	50K	—	Oct 7, 2024
Mandelia Ashish	VP	SELL	$15K–$50K	8K	$1.98	Oct 7, 2024
Mandelia Ashish	VP	EXERCISE	N/A	30K	—	Oct 7, 2024

🔓Seeing ranges? Sign in for exact trade values — free forever

Institutional Ownership

13F filings as of Dec 31, 2025 · 39 funds holding

Fund	Shares	Value	Type
Nextech Invest, Ltd.	483K	$1M+	SH
Bain Capital Life Sciences Investors, LLC	347K	$1M+	SH
Alamea Verwaltungs GmbH	24K	$1M+	SH
ACADIAN ASSET MANAGEMENT LLC	111K	$1M+	SH
Affinity Asset Advisors, LLC	100K	$1M+	SH
Groupe la Francaise	61K	$1M+	SH
GABELLI FUNDS LLC	47K	$1M+	SH
CREDIT INDUSTRIEL ET COMMERCIAL	41K	$1M+	SH
GEODE CAPITAL MANAGEMENT, LLC	36K	$1M+	SH
MACKENZIE FINANCIAL CORP	34K	$500K+	SH
Yakira Capital Management, Inc.	33K	$500K+	SH
VANGUARD GROUP INC	25K	$500K+	SH
STATE STREET CORP	20K	$500K+	SH
DELTEC ASSET MANAGEMENT LLC	18K	$500K+	SH
IEQ CAPITAL, LLC	13K	$100K–$500K	SH
Point72 Asset Management, L.P.	10K	$100K–$500K	SH
GAMCO INVESTORS, INC. ET AL	10K	$100K–$500K	SH
Knott David M Jr	10K	$100K–$500K	SH
OMERS ADMINISTRATION Corp	8K	$100K–$500K	SH
EQUITEC PROPRIETARY MARKETS, LLC	6K	$100K–$500K	SH