MRSN - Mersana Therapeutics, Inc. - Insider Stock Trading

Filing Date	T Date	Ticker	Sector	Ind	Industry	Owner	oSt	Rel	Title	T	TVal	Price	Qty	oc	Own	H
1/17/25 19:27	1/16/25	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	S.d	-2	0.5800	-4	-6	58	D
1/17/25 19:27	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	M.d	0	0.00	9	18	58	D
1/17/25 19:26	1/16/25	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	D		S.d	-5	0.5800	-9	-2	481	D
1/17/25 19:26	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	D		M.d	0	0.00	21	5	481	D
1/17/25 19:25	1/16/25	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	S.d	-5	0.5800	-8	-3	258	D
1/17/25 19:25	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	M.d	0	0.00	20	8	258	D
1/17/25 19:21	1/16/25	MRSN	Health	Drug	Pharmaceutical Preparations	Huber Martin H. Jr.	MA	DO	P,CEO	S.d	-3	0.5800	-5	-4	123	D
1/17/25 19:21	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Huber Martin H. Jr.	MA	DO	P,CEO	M.d	0	0.00	11	10	123	D
1/17/25 19:20	1/16/25	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	S.d	-5	0.5800	-8	-7	121	D
1/17/25 19:20	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	M.d	0	0.00	21	21	121	D
1/17/25 19:18	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	M.d	0	0.00	13	19	78	D
1/17/25 19:18	1/16/25	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.d	-3	0.5800	-5	-6	78	D
1/17/25 19:18	1/16/25	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	S.d	-3	0.5800	-6	-8	69	D
1/17/25 19:18	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	M.d	0	0.00	15	27	69	D
1/16/25 17:25	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	D		S.d	-4	0.6300	-6	-1	468	D
1/16/25 17:25	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	D		M.d	0	0.00	17	4	468	D
1/16/25 17:25	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	S.d	-1	0.6300	-2	-3	52	D
1/16/25 17:25	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	M.d	0	0.00	5	10	52	D
1/16/25 17:24	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	S.d	-1	0.6300	-2	-1	246	D
1/16/25 17:24	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	M.d	0	0.00	5	2	246	D
1/16/25 17:23	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	S.d	-1	0.6300	-2	-2	109	D
1/16/25 17:23	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	M.d	0	0.00	6	6	109	D
1/16/25 17:23	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.d	-1	0.6300	-1	-1	71	D
1/16/25 17:23	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	M.d	0	0.00	3	4	71	D
1/15/25 21:20	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	D		S.d	-8	0.6600	-12	-2	457	D
1/15/25 21:20	1/13/25	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	D		M.d	0	0.00	31	7	457	D
1/15/25 21:19	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	S.d	-1	0.6600	-1	-2	49	D
1/15/25 21:19	1/13/25	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	M.d	0	0.00	3	6	49	D
1/15/25 21:18	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	S.d	-2	0.6600	-3	-1	243	D
1/15/25 21:18	1/13/25	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	M.d	0	0.00	9	4	243	D
1/15/25 21:17	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	S.d	-2	0.6600	-4	-3	105	D
1/15/25 21:17	1/13/25	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	M.d	0	0.00	10	11	105	D
1/15/25 21:17	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.d	-2	0.6600	-3	-5	69	D
1/15/25 21:17	1/13/25	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	M.d	0	0.00	9	15	69	D
1/15/25 21:16	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	S.d	-2	0.6600	-3	-5	60	D
1/15/25 21:16	1/13/25	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	M.d	0	0.00	9	17	60	D
10/29/24 16:43	10/28/24	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	S.d	-4	1.90	-2	-3	55	D
10/29/24 16:43	10/25/24	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	M.d	0	0.00	6	13	55	D
10/7/24 17:48	10/2/24	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	S.dm	-27	1.98	-14	-13	95	D
10/7/24 17:48	10/1/24	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	M.d	0	0.00	50	112	95	D
10/7/24 17:48	10/2/24	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.dm	-27	1.98	-14	-18	64	D
10/7/24 17:48	10/1/24	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	M.d	0	0.00	50	365	64	D
10/7/24 17:47	10/2/24	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	S.dm	-27	1.98	-14	-21	50	D
10/7/24 17:47	10/1/24	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	M.d	0	0.00	50	999%	50	D
10/7/24 17:47	10/2/24	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	S.dm	-16	1.98	-8	-15	48	D
10/7/24 17:47	10/1/24	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	M.d	0	0.00	30	169	48	D
10/7/24 17:46	10/2/24	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	S.dm	-27	1.98	-14	-5	236	D
10/7/24 17:46	10/1/24	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	M.d	0	0.00	50	27	236	D
9/13/24 17:08	9/12/24	MRSN	Health	Drug	Pharmaceutical Preparations	Huber Martin H. Jr.	MA	DO	P,CEO	S.d	-89	1.76	-50	-30	116	D
9/13/24 17:08	9/11/24	MRSN	Health	Drug	Pharmaceutical Preparations	Huber Martin H. Jr.	MA	DO	P,CEO	M.d	0	0.00	167		116	D
1/17/24 17:21	1/16/24	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	D		S.d	-80	2.71	-29	-6	438	D
1/17/24 17:21	1/13/24	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	D		M.dm	0	0.00	87	25	438	D
1/17/24 17:21	1/16/24	MRSN	Health	Drug	Pharmaceutical Preparations	Misra Tushar	MA	O	SVP,Chie	S.d	-9	2.71	-3	-16	18	D
1/17/24 17:21	1/13/24	MRSN	Health	Drug	Pharmaceutical Preparations	Misra Tushar	MA	O	SVP,Chie	M.dm	0	0.00	9	91	18	D
1/17/24 17:20	1/16/24	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	S.d	-14	2.71	-5	-18	23	D
1/17/24 17:20	1/13/24	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	M.dm	0	0.00	13	121	23	D
1/17/24 17:19	1/13/24	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	M.dm	0	0.00	29	17	199	D
1/17/24 17:19	1/16/24	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	S.d	-28	2.71	-10	-5	199	D
1/17/24 17:18	1/16/24	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.d	-12	2.71	-4	-14	27	D
1/17/24 17:18	1/13/24	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	M.dm	0	0.00	11	72	27	D
1/17/24 17:18	1/16/24	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	S.d	-25	2.71	-9	-15	55	D
1/17/24 17:18	1/13/24	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	M.dm	0	0.00	26	94	55	D
1/17/24 17:16	1/16/24	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	S.d	-9	2.71	-3	-20	14	D
1/17/24 17:16	1/13/24	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	M.d	0	0.00	9	165	14	D
10/27/23 16:07	10/26/23	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	S.d	-2	1.13	-2	-18	9	D
10/27/23 16:07	10/25/23	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	M.d	0	0.00	6	252	9	D
8/18/23 16:01	8/17/23	MRSN	Health	Drug	Pharmaceutical Preparations	Misra Tushar	MA	O	SVP,Chie	S.d	-2	1.18	-2	-14	12	D
8/18/23 16:01	8/16/23	MRSN	Health	Drug	Pharmaceutical Preparations	Misra Tushar	MA	O	SVP,Chie	M.d	0	0.00	6	119	12	D
4/28/23 16:15	4/26/23	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	M.d	0	0.00	13	187	20	D
4/28/23 16:15	4/27/23	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.d	-15	3.89	-4	-16	20	D
1/18/23 20:29	1/17/23	MRSN	Health	Drug	Pharmaceutical Preparations	Yang Arvin	MA	O	SVP,Chie	S.d	-13	5.74	-2	-7	31	D
1/18/23 20:29	1/14/23	MRSN	Health	Drug	Pharmaceutical Preparations	Yang Arvin	MA	O	SVP,Chie	M.d	0	0.00	7	30	31	D
1/18/23 20:24	1/17/23	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	DO	P,CEO	S.d	-100	5.74	-17	-5	361	M
1/18/23 20:24	1/14/23	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	DO	P,CEO	M.dm	0	0.00	56	18	361	M
1/18/23 20:20	1/17/23	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Contr	S.d	-21	5.74	-4	-21	14	D
1/18/23 20:20	1/14/23	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Contr	M.dm	0	0.00	10	291	14	D
1/18/23 20:18	1/17/23	MRSN	Health	Drug	Pharmaceutical Preparations	Misra Tushar	MA	O	SVP,CMO	S.d	-3	5.74	0	-7	6	D
1/18/23 20:18	1/14/23	MRSN	Health	Drug	Pharmaceutical Preparations	Misra Tushar	MA	O	SVP,CMO	M.d	0	0.00	1	33	6	D
1/18/23 20:14	1/14/23	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	M.dm	0	0.00	20	12	180	D
1/18/23 20:14	1/17/23	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	S.d	-36	5.74	-6	-3	180	D
1/18/23 20:12	1/17/23	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,CFO	S.d	-29	5.74	-5	-14	33	D
1/18/23 20:12	1/14/23	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,CFO	M.dm	0	0.00	16	101	33	D
1/18/23 20:09	1/17/23	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.d	-4	5.74	-1	-7	11	D
1/18/23 20:09	1/14/23	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	M.d	0	0.00	3	29	11	D
12/16/22 16:46	12/14/22	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	M.d	53	1.49	35	27	167	D
12/2/22 16:01	12/1/22	MRSN	Health	Drug	Pharmaceutical Preparations	Yang Arvin	MA	O	Chief Me	S.d	-36	6.59	-6	-18	26	D
12/2/22 16:01	11/30/22	MRSN	Health	Drug	Pharmaceutical Preparations	Yang Arvin	MA	O	Chief Me	M.d	0	0.00	19	248	26	D
8/18/22 16:40	8/17/22	MRSN	Health	Drug	Pharmaceutical Preparations	Misra Tushar	MA	O	Chief Ma	S.d	-13	7.10	-2	-30	4	D
8/18/22 16:40	8/16/22	MRSN	Health	Drug	Pharmaceutical Preparations	Misra Tushar	MA	O	Chief Ma	M.d	0	0.00	6		4	D
6/2/22 18:17	5/31/22	MRSN	Health	Drug	Pharmaceutical Preparations	Hack Andrew A. F.	MA	D		P.m	312	3.27	96	1	8,664	I
5/26/22 18:02	5/24/22	MRSN	Health	Drug	Pharmaceutical Preparations	Hack Andrew A. F.	MA	D		P.m	854	3.22	265	3	8,568	I
5/23/22 17:49	5/19/22	MRSN	Health	Drug	Pharmaceutical Preparations	Hack Andrew A. F.	MA	D		P.m	746	3.46	216	3	8,303	I
5/18/22 18:19	5/16/22	MRSN	Health	Drug	Pharmaceutical Preparations	Hack Andrew A. F.	MA	D		P.m	1,138	3.25	350	5	8,087	I

D	Derivative transaction in filing (usually option exercise)
M	Multiple transactions in filing; earliest reported transaction date and weighted average transaction price
A	Amended filing
E	Error detected in filing

S - Sale	Sale of securities on an exchange or to another person
S - Sale+OE	Sale of securities on an exchange or to another person (after option exercise)
F - Tax	Payment of exercise price or tax liability using portion of securities received from the company
P - Purchase	Purchase of securities on an exchange or from another person

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