Jane Street

Jane Street’s Mersana Therapeutics MRSN Stock Holding History

Jane Street’s Portfolio MRSN Stock Details MRSN Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q3	–	Sell	-20,447	Closed	-$151K	–	11511
2025 Q2	$151K	Buy	+20,447	New	+$180K	﹤0.01%	8744
2025 Q1	–	Sell	-6,061	Closed	-$217K	–	10217
2024 Q4	$217K	Sell	6,061 -10,637	-64%	-$550K	﹤0.01%	8286
2024 Q3	$789K	Buy	16,698 +4,005	+32%	+$177K	﹤0.01%	6342
2024 Q2	$638K	Sell	12,693 -2,132	-14%	-$154K	﹤0.01%	6621
2024 Q1	$1.66M	Sell	14,825 -16	-0.1%	-$1.59K	﹤0.01%	4468
2023 Q4	$861K	Buy	14,841 +3,921	+36%	+$158K	﹤0.01%	5825
2023 Q3	$347K	Sell	10,920 -1,659	-13%	-$78.9K	﹤0.01%	6841
2023 Q2	$1.03M	Buy	+12,579	New	+$1.84M	﹤0.01%	5136
2022 Q4	–	Sell	-1,337	Closed	-$226K	–	9788
2022 Q3	$226K	Buy	+1,337	New	+$217K	﹤0.01%	7988
2022 Q2	–	Sell	-5,733	Closed	-$572K	–	10481
2022 Q1	$572K	Buy	5,733 +3,672	+178%	+$429K	﹤0.01%	7216
2021 Q4	$320K	Buy	2,061 +236	+13%	+$45.9K	﹤0.01%	8049
2021 Q3	$430K	Sell	1,825 -270	-13%	-$78.9K	﹤0.01%	7567
2021 Q2	$712K	Sell	2,095 -438	-17%	-$166K	﹤0.01%	6553
2021 Q1	$1.02M	Sell	2,533 -800	-24%	-$388K	﹤0.01%	5405
2020 Q4	$2.22M	Buy	3,333 +1,931	+138%	+$1.07M	0.01%	3303
2020 Q3	$653K	Buy	1,402 +467	+50%	+$236K	﹤0.01%	4758
2020 Q2	$547K	Buy	935 +439	+89%	+$150K	﹤0.01%	4948
2020 Q1	$72K	Buy	+496	New	+$86.7K	﹤0.01%	5027
2019 Q3	–	Sell	-2,458	Closed	-$249K	–	5530
2019 Q2	$249K	Buy	2,458 +2,004	+441%	+$236K	﹤0.01%	4439
2019 Q1	$60K	Buy	+454	New	+$57.1K	﹤0.01%	4816

Other funds holding MRSN

Nextech Invest Zurich, Switzerland $1.42B AUM 304.47% 1-Year Est. Return

Alamea Verwaltungs Edison, New Jersey $135M AUM 36.32% 1-Year Est. Return

Bain Capital Life Sciences Investors Boston, Massachusetts $1.11B AUM 171.34% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Schonfeld Strategic Advisors New York $12.3B AUM 37.17% 1-Year Est. Return

Rock Springs Capital Management Baltimore, Maryland $1.7B AUM 93.03% 1-Year Est. Return

Acadian Asset Management

Acadian Asset Management Boston, Massachusetts $70.5B AUM 36% 1-Year Est. Return

Silverarc Capital Management Boston, Massachusetts $849M AUM 470.8% 1-Year Est. Return

683 Capital Management New York $1.08B AUM 85.52% 1-Year Est. Return

BlackRock New York $5.7T AUM 30.48% 1-Year Est. Return