1. Corporate Officers - C
2. Carvajal Alejandra

Insider Trading History of Carvajal Alejandra

The following table details the insider trading activities (stock purchases, stock sales, and stock option exercises) of Carvajal Alejandra since 2019. This trader's CIK number is 1645755. At the time of last reporting, Carvajal Alejandra was the SVP, Chief Legal Officer of Mersana Therapeutics, Inc.. (stock ticker symbol MRSN). Also see all insider trading activities at Mersana Therapeutics, Inc..

Note that in the past Carvajal Alejandra also reported insider trading activities as an insider of the following companies:

Yearly summary of insider trading at Momenta Pharmaceuticals Inc (MNTA) by Carvajal Alejandra

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2020	MNTA	0	$0	33,517	$1,048,257	17,312	$0
2019	MNTA	0	$0	20,837	$301,305	9,750	$0

Yearly summary of insider trading at Mersana Therapeutics, Inc. (MRSN) by Carvajal Alejandra

		Insider Buying		Insider Sales		Option Exercises
Year	Symbol	Shares	Value	Shares	Value	Shares	Value
2025	MRSN	0	$0	9,378	$5,751	23,958	$0
2024	MRSN	0	$0	18,068	$39,022	61,458	$0
2023	MRSN	0	$0	4,726	$19,830	15,750	$0
2022	MRSN	0	$0	3,948	$14,568	13,250	$0

Insider trading activities at 2 companies by Carvajal Alejandra:

1. Momenta Pharmaceuticals Inc (MNTA)

2. Mersana Therapeutics, Inc. (MRSN)

Table 1. Insider trading of Momenta Pharmaceuticals Inc (MNTA) by Carvajal Alejandra

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2020-07-20	MNTA	Sale	1,087	33.95	36,903
2020-07-17	MNTA	Option Ex	2,437	.00	0
2020-06-30	MNTA	Sale	6,811	35.10	239,066
2020-06-12	MNTA	Sale	6,756	30.15	203,693
2020-04-20	MNTA	Sale	1,124	28.97	32,562
2020-04-17	MNTA	Option Ex	2,438	.00	0
2020-03-06	MNTA	Sale	5,302	29.00	153,758
2020-02-14	MNTA	Sale	6,892	31.54	217,373
2020-02-12	MNTA	Option Ex	10,000	.00	0
2020-02-13	MNTA	Sale	3,108	30.03	93,333
2020-01-22	MNTA	Sale	1,577	28.98	45,701
2020-01-17	MNTA	Option Ex	2,437	.00	0
2020-01-21	MNTA	Sale	860	30.08	25,868
2019-10-21	MNTA	Sale	6,814	14.40	98,121
2019-10-18	MNTA	Sale	2,936	13.83	40,604
2019-10-17	MNTA	Option Ex	9,750	.00	0
2019-04-29	MNTA	Sale	10,384	14.77	153,371
2019-02-14	MNTA	Sale	703	13.10	9,209

Table 2. Insider trading of Mersana Therapeutics, Inc. (MRSN) by Carvajal Alejandra

Trade Date	Symbol	Trade Type	Shares	Price ($)	Value ($)
2025-01-15	MRSN	Option Ex	12,500	.00	0
2025-01-16	MRSN	Sale	5,096	.58	2,955
2025-01-14	MRSN	Option Ex	2,500	.00	0
2025-01-15	MRSN	Sale	952	.63	599
2025-01-14	MRSN	Sale	3,330	.66	2,197
2025-01-13	MRSN	Option Ex	8,958	.00	0
2024-10-02	MRSN	Sale	8,089	2.00	16,178
2024-10-03	MRSN	Sale	5,598	1.96	10,972
2024-10-01	MRSN	Option Ex	50,000	.00	0
2024-01-14	MRSN	Option Ex	2,500	.00	0
2024-01-13	MRSN	Option Ex	8,958	.00	0
2024-01-16	MRSN	Sale	4,381	2.71	11,872
2023-04-27	MRSN	Sale	3,944	3.89	15,342
2023-04-26	MRSN	Option Ex	13,250	.00	0
2023-01-14	MRSN	Option Ex	2,500	.00	0
2023-01-17	MRSN	Sale	782	5.74	4,488
2022-04-26	MRSN	Option Ex	13,250	.00	0
2022-04-26	MRSN	Sale	3,948	3.69	14,568

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Carvajal Alejandra (SVP, Chief Legal Officer of Mersana Therapeutics, Inc. at the time of this reporting) see the Securities and Exchange Commission (SEC) website.

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