Renaissance Technologies’s Mersana Therapeutics MRSN Stock Holding History

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-88,465	Closed	-$686K	–	3566
2025 Q3	$686K	Sell	88,465 -25,543	-22%	-$192K	﹤0.01%	2663
2025 Q2	$844K	Buy	114,008 +80,411	+239%	+$707K	﹤0.01%	2592
2025 Q1	$289K	Buy	33,597 +9,346	+39%	+$144K	﹤0.01%	2938
2024 Q4	$867K	Buy	24,251 +4,542	+23%	+$235K	﹤0.01%	2575
2024 Q3	$931K	Sell	19,709 -38,220	-66%	-$1.69M	﹤0.01%	2487
2024 Q2	$2.91M	Buy	57,929 +816	+1%	+$59K	﹤0.01%	1630
2024 Q1	$6.4M	Buy	57,113 +22,484	+65%	+$2.24M	0.01%	1254
2023 Q4	$2.01M	Sell	34,629 -2,408	-7%	-$96.9K	﹤0.01%	1951
2023 Q3	$1.18M	Sell	37,037 -4,880	-12%	-$232K	﹤0.01%	2191
2023 Q2	$3.45M	Sell	41,917 -8,104	-16%	-$1.19M	0.01%	1640
2023 Q1	$5.14M	Buy	50,021 +27,152	+119%	+$3.81M	0.01%	1463
2022 Q4	$3.35M	Sell	22,869 -5,084	-18%	-$859K	﹤0.01%	1747
2022 Q3	$4.72M	Buy	27,953 +5,140	+23%	+$835K	0.01%	1480
2022 Q2	$2.63M	Sell	22,813 -13,955	-38%	-$1.31M	﹤0.01%	1993
2022 Q1	$3.67M	Buy	36,768 +23,064	+168%	+$2.69M	﹤0.01%	1793
2021 Q4	$2.13M	Buy	+13,704	New	+$2.67M	﹤0.01%	2096
2020 Q4	–	Sell	-2,860	Closed	-$1.33M	–	3599
2020 Q3	$1.33M	Sell	2,860 -10,751	-79%	-$5.43M	﹤0.01%	2350
2020 Q2	$7.96M	Sell	13,611 -17,732	-57%	-$6.06M	0.01%	1363
2020 Q1	$4.57M	Buy	31,343 +2,552	+9%	+$446K	﹤0.01%	1619
2019 Q4	$4.12M	Sell	28,791 -1,878	-6%	-$137K	﹤0.01%	1977
2019 Q3	$1.21M	Buy	30,669 +20,028	+188%	+$1.46M	﹤0.01%	2517
2019 Q2	$1.08M	Buy	10,641 +3,660	+52%	+$431K	﹤0.01%	2641
2019 Q1	$918K	Buy	+6,981	New	+$878K	﹤0.01%	2709