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Mersana Therapeutics Inc. (MRSN)

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Sector: Healthcare

Insider Roster

F. A. Andrew Hack, 2026-01-06
Kristen Hege, Director, 2026-01-06
M. Allene Diaz, Director, 2026-01-06
H Willard Dere, Director, 2026-01-06
Alejandra Carvajal, Svp, Chief Legal Officer, 2026-01-06
Mohan Bala, Svp, Chief Development, 2026-01-06
M Lawrence Alleva, Director, 2026-01-06
Jr. H. Martin Huber, President, Ceo, 2026-01-06
Ashish Mandelia, Vp, Chief Accounting Officer, 2026-01-06
Anna Protopapas, Director, 2026-01-06
B Timothy Lowinger, Svp, Chief Sci.&Tech. Officer, 2026-01-06
M David Mott, Director, 2026-01-06
Brian Deschuytner, Svp, Coo & Cfo, 2026-01-06
Costas Constantinides, Large Shareholder, 2024-12-30
R.l. S.a Gp I Crossover Nextech, Large Shareholder, 2024-12-30
Ian Charoub, Large Shareholder, 2024-12-30
Scsp I Crossover Nextech, 2024-12-30
Rocco Sgobbo, Large Shareholder, 2024-12-30
Ecor1 Capital, Llc, Large Shareholder, 2024-12-24
Tushar Misra, Svp, Chief Manuf. Officer, 2024-01-17
Arvin Yang, Svp, Chief Medical Officer, 2023-01-19
J. Michael Kaufman, Chief Manufacturing Officer, 2021-07-20
M. Eva Jack, Chief Bus. Officer, Tres, Sec., 2020-09-16
W. Peter Sonsini, Large Shareholder, 2020-09-16
D Scott Sandell, Large Shareholder, 2020-09-16
J Patrick Kerins, Large Shareholder, 2020-09-16
Jr. A. Anthony Florence, Large Shareholder, 2020-09-16
Forest Baskett, Large Shareholder, 2020-09-16
Nea 14 Gp, Ltd, Large Shareholder, 2020-09-16
Nea Partners 14, L.p., Large Shareholder, 2020-09-16
New Enterprise Associates 14, L.p., Large Shareholder, 2020-09-16
Dirk Huebner, Chief Medical Officer, 2020-01-16
J Peter Barris, Large Shareholder, 2019-03-06
A David Spellman, Chief Financial Officer, 2019-01-25
Wayne Foster, Vice President Of Finance, 2019-01-25
A Donald Bergstrom, Chief Medical Officer, 2018-02-06
M. Sara Nayeem, Director, 2018-01-04
Ravi Viswanathan, Large Shareholder, 2017-07-06
James M Barrett, Large Shareholder, 2017-07-06
Fmr Llc, Other, 2017-07-06
V Elaine Jones, Director, 2017-06-27

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Hedge Fund Popularity

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Hedge Fund Holdings

Filing Period:

Last updated on February 17, 2026, 4:56pm based on SEC 13F filings Last update: February 17, 2026, 4:56pm

No.	Hedge Fund	Shares	Value	Activity	% Port
1.	Rock Springs Capital Management Kris Jenner, Gordon Bussard, Graham Mcphail	152,586	$4,414,313		0.23%
2.	Millennium Management Israel Englander	63,305	$1,831,414	-19%	0%
3.	Rangeley Capital Christopher Demuth	57,098	$1,651,845		1.37%
4.	AQR Capital Management Cliff Asness	37,264	$1,078,047	-21%	0%
5.	Citadel Investment Group Ken Griffin	22,493	$650,722		0%

Insider Trading: Purchases See All

Insider	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
Hack Director	$3.20	14,760	$47,181.82	8,663,673	2022-06-02	Filing
Hack Director	$3.28	80,759	$264,776.46	8,648,913	2022-05-31	Filing
Hack Director	$3.19	75,000	$238,942.50	8,568,154	2022-05-26	Filing
Hack Director	$3.18	90,155	$286,242.13	8,493,154	2022-05-25	Filing
Hack Director	$3.29	100,000	$328,990.00	8,402,999	2022-05-24	Filing

Insider Trading: Sales See All

Insider	Price	Amount	Total Value	Remaining Holdings	Date	Form 4
Bala Officer	$9.90	77	$762.30	2,922	2025-10-27	Filing
Huber Officer, Director	$7.31	2,012	$14,707.72	9,572	2025-09-12	Filing
Mandelia Officer	$0.58	3,554	$2,061.32	57,519	2025-01-16	Filing
Protopapas Director	$0.58	8,637	$5,009.46	168,041	2025-01-16	Filing
Lowinger Officer	$0.58	8,048	$4,667.84	257,673	2025-01-16	Filing

Institutional Investors' Holdings

Filing Period:

No.	Name	Shares	Value	% Port
1.	Nextech Invest, Ltd.	482,689	$13,964,193	1.35%
2.	Bain Capital Life Sciences Investors, Llc	346,545	$10,025,547	0.77%
3.	Vanguard Group Inc	210,301	$6,084,008	0%
4.	Alamea Verwaltungs Gmbh	24,165	$3,336,994	2.25%
5.	Affinity Asset Advisors, Llc	100,000	$2,893,000	0.16%

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