Mersana Therapeutics Inc. (MRSN) - Insider Holders & Insider Ownership

List of insiders holdings for Mersana Therapeutics Inc.:
  1. Shares directly owned by the insider.
  2. Shares indirectly owned by the insider.
  3. Total shares owned by the insider (sum of shares directly and indirectly owned).
  4. Total market value if available.
  5. Shares are not adjusted for stock split.
"Insiders might sell their shares for any number of reasons, but they buy them for only one: they think the price will rise"
- Peter Lynch
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#Insider Holder NameReport
Date Time		Shares Owned
Directly
Indirectly		Total
Shares Owned		Filing
1BARRETT M JAMES
10% Owner		2017-07-06 17:16:280
8,140,138		8,140,138Form 4
2Viswanathan Ravi
10% Owner		2017-07-06 17:20:300
8,140,138		8,140,138Form 4
3NEA Partners 14 L.P.
NEA 14 GP LTD
10% Owner		2020-09-16 16:43:0840,000
7,959,520		7,999,520Form 4
4Florence Anthony A. Jr.
10% Owner		2020-09-16 16:45:354,285
2,080,520		2,084,805Form 4
5BASKETT FOREST
10% Owner		2020-09-16 16:44:180
2,073,464		2,073,464Form 4
6SANDELL SCOTT D
10% Owner		2020-09-16 16:47:360
2,072,194		2,072,194Form 4
7KERINS PATRICK J
10% Owner		2020-09-16 16:46:354,796
2,060,000		2,064,796Form 4
8Sonsini Peter W.
10% Owner		2020-09-16 16:48:25993
2,061,192		2,062,185Form 4
9FMR LLC
See Remark 1		2018-02-13 09:40:30884,015
0		884,015Form 13G
10Yang Arvin
SVP, Chief Medical Officer		2023-01-18 20:29:00317,903
0		317,903Form 4
11MISRA TUSHAR
SVP, Chief Manuf. Officer		2024-01-17 17:21:21271,299
0		271,299Form 4
12Huebner Dirk
Chief Medical Officer		2020-01-16 16:34:44100,833
0		100,833Form 4
13Spellman David A
Chief Financial Officer		2019-01-25 16:07:18100,000
0		100,000Form 4
14Bergstrom Donald A
Chief Medical Officer		2018-02-06 16:24:3556,884
0		56,884Form 4
15Jack Eva M.
Chief Bus. Officer, Tres, Sec.		2020-09-16 18:31:2235,248
0		35,248Form 4
16Kaufman Michael J.
Chief Manufacturing Officer		2021-07-19 20:50:2132,622
0		32,622Form 4
17Foster Wayne
Vice President of Finance		2019-01-25 16:05:0530,750
0		30,750Form 4
18Nayeem Sara M.
Director		2018-01-04 16:31:303,560
0		3,560Form 4
19Protopapas Anna
Director		2026-01-06 16:42:170
0		0Form 4
20Hack Andrew A. F.
Director		2026-01-06 18:32:590
0		0Form 4
21Hege Kristen
Director		2026-01-06 16:55:450
0		0Form 4
22Diaz Allene M.
Director		2026-01-06 16:54:240
0		0Form 4
23Dere Willard H
Director		2026-01-06 16:52:540
0		0Form 4
24Carvajal Alejandra
SVP, Chief Legal Officer		2026-01-06 16:51:060
0		0Form 4
25Bala Mohan
SVP, Chief Development		2026-01-06 16:49:490
0		0Form 4
26Alleva Lawrence M
Director		2026-01-06 16:48:180
0		0Form 4
27Huber Martin H. Jr.
President, CEO		2026-01-06 16:47:180
0		0Form 4
28Mandelia Ashish
VP, Chief Accounting Officer		2026-01-06 16:44:120
0		0Form 4
29New Enterprise Associates 14 L.P.
10% Owner		2020-12-10 13:17:310
0		0Form 13D
30Lowinger Timothy B
SVP, Chief Sci.&Tech. Officer		2026-01-06 16:40:510
0		0Form 4
31MOTT DAVID M
Director		2026-01-06 16:39:240
0		0Form 4
32DeSchuytner Brian
SVP, COO & CFO		2026-01-06 16:38:270
0		0Form 4
33NEXTECH CROSSOVER I SCSP
Nextech Crossover I GP S.a r.l.
Charoub Ian
Constantinides Costas
Sgobbo Rocco
10% Owner		2026-01-09 13:28:340
0		0Form 13G
34EcoR1 Capital LLC
10% Owner		2025-05-15 14:16:440
0		0Form 13G
35Jones Elaine V
Director		2017-06-27 19:36:060
0		0Form 3
36New Enterprise Associates 14 L.P.
Sonsini Peter W.
NEA 14 GP LTD
NEA Partners 14 L.P.
BARRIS PETER J
BASKETT FOREST
Florence Anthony A. Jr.
KERINS PATRICK J
SANDELL SCOTT D
10% Owner		2020-12-10 13:17:310
0		0Form 13D