State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s Mersana Therapeutics MRSN Stock Holding History

Quarter Market Value Status Shares Shares
Change %
Trade Value Portfolio Weight Portfolio Position
2024
Q3
Sell
-83,600
Closed -$168K 2327
2024
Q2
$168K Sell
83,600
-22,900
-22% -$46K ﹤0.01% 2171
2024
Q1
$477K Buy
+106,500
New +$477K ﹤0.01% 1776
2023
Q4
Sell
-10,254
Closed -$13K 2486
2023
Q3
$13K Sell
10,254
-59,770
-85% -$75.9K ﹤0.01% 2479
2023
Q2
$230K Sell
70,024
-3,614
-5% -$11.9K ﹤0.01% 2083
2023
Q1
$303K Buy
73,638
+740
+1% +$3.04K ﹤0.01% 2085
2022
Q4
$427K Sell
72,898
-64,872
-47% -$380K ﹤0.01% 1953
2022
Q3
$931K Sell
137,770
-102,959
-43% -$696K ﹤0.01% 1573
2022
Q2
$1.11M Buy
240,729
+45,429
+23% +$210K ﹤0.01% 1581
2022
Q1
$779K Buy
195,300
+123,700
+173% +$493K ﹤0.01% 1691
2021
Q4
$445K Hold
71,600
﹤0.01% 1711
2021
Q3
$675K Sell
71,600
-8,100
-10% -$76.4K ﹤0.01% 1576
2021
Q2
$1.08M Sell
79,700
-11,300
-12% -$153K ﹤0.01% 1427
2021
Q1
$1.47M Buy
91,000
+4,100
+5% +$66.3K ﹤0.01% 1284
2020
Q4
$2.31M Sell
86,900
-4,300
-5% -$114K 0.01% 1165
2020
Q3
$1.7M Buy
91,200
+13,700
+18% +$255K ﹤0.01% 1178
2020
Q2
$1.81M Buy
77,500
+19,200
+33% +$449K 0.01% 1145
2020
Q1
$340K Buy
+58,300
New +$340K ﹤0.01% 1446
2019
Q2
Sell
-17,000
Closed -$89K 1578
2019
Q1
$89K Buy
17,000
+4,000
+31% +$20.9K ﹤0.01% 1512
2018
Q4
$53K Buy
+13,000
New +$53K ﹤0.01% 1519