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 19:26	1/16/25	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	D		S.d	-5	0.5800	-9	-2	481	D
1/17/25 19:25	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 19:21	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 19:20	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 19:18	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
1/16/25 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	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	S.d	-1	0.6300	-2	-3	52	D
1/16/25 17:24	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 17:23	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	1/15/25	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.d	-1	0.6300	-1	-1	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 21:19	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 21:18	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 21:17	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	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.d	-2	0.6600	-3	-5	69	D
1/15/25 21:16	1/14/25	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	S.d	-2	0.6600	-3	-5	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
10/7/24 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	10/2/24	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.dm	-27	1.98	-14	-18	64	D
10/7/24 17:47	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	10/2/24	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Chief	S.dm	-16	1.98	-8	-15	48	D
10/7/24 17:46	10/2/24	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	SVP,Chie	S.dm	-27	1.98	-14	-5	236	D
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
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	1/16/24	MRSN	Health	Drug	Pharmaceutical Preparations	Misra Tushar	MA	O	SVP,Chie	S.d	-9	2.71	-3	-16	18	D
1/17/24 17:20	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 17:19	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	1/16/24	MRSN	Health	Drug	Pharmaceutical Preparations	Deschuytner Brian	MA	O	SVP,COO,	S.d	-25	2.71	-9	-15	55	D
1/17/24 17:16	1/16/24	MRSN	Health	Drug	Pharmaceutical Preparations	Bala Mohan	MA	O	SVP,Chie	S.d	-9	2.71	-3	-20	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
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
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 20:24	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 20:20	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 20:18	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 20:14	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 20:09	1/17/23	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	SVP,GC	S.d	-4	5.74	-1	-7	11	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
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
4/28/22 17:23	4/26/22	MRSN	Health	Drug	Pharmaceutical Preparations	Carvajal Alejandra	MA	O	GC	S.d	-15	3.69	-4	-30	9	D
1/19/22 18:25	1/18/22	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-28	5.92	-5	-3	131	D
1/19/22 18:19	1/18/22	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Contr	S.d	-12	5.92	-2	-37	3	D
12/2/21 17:00	12/1/21	MRSN	Health	Drug	Pharmaceutical Preparations	Yang Arvin	MA	O	Chief Me	S.d	-38	6.81	-6	-30	13	D
8/24/21 16:31	8/20/21	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-24	11.01	-2	-3	75	D
7/22/21 16:32	7/20/21	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-27	12.11	-2	-3	75	D
7/19/21 20:50	7/16/21	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.dm	-199	12.24	-16	-18	75	D
7/19/21 20:50	7/16/21	MRSN	Health	Drug	Pharmaceutical Preparations	Kaufman Michael J.	MA	O	Chief Ma	S.dm	-148	12.24	-12	-27	33	D
7/19/21 20:49	7/16/21	MRSN	Health	Drug	Pharmaceutical Preparations	Protopapas Anna	MA	DO	P,CEO	S.dm	-513	12.24	-42	-13	283	D
7/2/21 16:32	7/1/21	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	CS,Techn	S.d	-26	13.60	-2	-6	31	D
7/2/21 16:31	7/1/21	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Contr	S	-13	13.60	-1	-100	0	D
6/23/21 16:30	6/21/21	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-31	13.78	-2	-7	31	D
5/24/21 16:30	5/20/21	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-58	14.10	-4	-12	31	D
4/22/21 16:16	4/20/21	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-65	15.91	-4	-12	31	D
3/24/21 17:00	3/22/21	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-144	17.50	-8	-21	31	D
2/24/21 17:00	2/22/21	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-164	20.01	-8	-21	31	D
1/22/21 17:00	1/20/21	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-177	21.54	-8	-21	31	D
1/20/21 19:03	1/19/21	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Contr	S.d	-12	21.28	-1	-100	0	D
1/6/21 19:00	1/4/21	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Contr	S	-7	26.76	0	-100	0	D
12/22/20 16:34	12/21/20	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-210	25.60	-8	-100	0	D
11/24/20 16:31	11/20/20	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-189	23.05	-8	-100	0	D
10/22/20 16:31	10/20/20	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.dm	-140	17.12	-8	-33	17	D
9/23/20 16:30	9/21/20	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-426	20.66	-21	-100	0	D
9/16/20 18:31	9/14/20	MRSN	Health	Drug	Pharmaceutical Preparations	Jack Eva M.	MA	O	Chief Bu	S.d	-775	22.00	-35	-100	0	D
7/6/20 16:15	7/2/20	MRSN	Health	Drug	Pharmaceutical Preparations	Mandelia Ashish	MA	O	VP,Contr	S	-76	22.49	-3	-100	0	D
4/14/20 17:54	4/13/20	MRSN	Health	Drug	Pharmaceutical Preparations	Sandell Scott D	MD	T		S.m	-20	9.04	-2	0	7,960	I
4/14/20 17:54	4/13/20	MRSN	Health	Drug	Pharmaceutical Preparations	Baskett Forest	MD	T		S	-27	8.58	-3	0	7,960	I
4/13/20 21:10	4/13/20	MRSN	Health	Drug	Pharmaceutical Preparations	Sandell Scott D	MD	T		S	-178	8.50	-21	0	7,962	I
4/13/20 21:06	4/13/20	MRSN	Health	Drug	Pharmaceutical Preparations	Florence Anthony A. Jr.	MD	T		S	-178	8.50	-21	0	7,962	M
4/13/20 21:06	4/13/20	MRSN	Health	Drug	Pharmaceutical Preparations	Baskett Forest	MD	T		S	-178	8.50	-21	0	7,963	I
4/13/20 20:39	8/28/19	MRSN	Health	Drug	Pharmaceutical Preparations	New Enterprise Associates 14, L.P.	MD	T		S.d	-4	2.91	-1	0	11,960	D
9/25/18 17:07	9/24/18	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-41	11.63	-4	-22	12	D
8/29/18 16:24	8/27/18	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S.d	-46	13.15	-4	-22	12	D
7/25/18 16:04	7/23/18	MRSN	Health	Drug	Pharmaceutical Preparations	Lowinger Timothy B	MA	O	Chief Sc	S	-39	11.06	-4	-22	12	D

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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