State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s Bio-Rad Laboratories Class A BIO Stock Holding History

State of Wisconsin Investment Board’s Portfolio BIO Stock Details BIO Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$3.64M Sell
13,074
-574
-4% -$165K 0.01% 1117
2025
Q4 		$4.14M Sell
13,648
-2,224
-14% -$694K 0.01% 1079
2025
Q3 		$4.45M Sell
15,872
-230
-1% -$62.6K 0.01% 1010
2025
Q2 		$3.89M Buy
16,102
+1,610
+11% +$381K 0.01% 1021
2025
Q1 		$3.53M Sell
14,492
-861
-6% -$259K 0.01% 1043
2024
Q4 		$5.04M Buy
15,353
+3,492
+29% +$1.19M 0.01% 942
2024
Q3 		$3.97M Sell
11,861
-8,454
-42% -$2.69M 0.01% 1041
2024
Q2 		$5.55M Buy
20,315
+7,718
+61% +$2.24M 0.01% 876
2024
Q1 		$4.36M Sell
12,597
-1,803
-13% -$593K 0.01% 1000
2023
Q4 		$4.65M Buy
14,400
+2,608
+22% +$817K 0.01% 1003
2023
Q3 		$4.23M Sell
11,792
-1,131
-9% -$436K 0.01% 998
2023
Q2 		$4.9M Sell
12,923
-133
-1% -$54.1K 0.01% 981
2023
Q1 		$6.25M Buy
13,056
+1,866
+17% +$874K 0.02% 836
2022
Q4 		$4.71M Sell
11,190
-1,985
-15% -$801K 0.02% 973
2022
Q3 		$5.5M Sell
13,175
-2,951
-18% -$1.47M 0.02% 893
2022
Q2 		$7.98M Sell
16,126
-1,191
-7% -$620K 0.02% 754
2022
Q1 		$9.75M Sell
17,317
-16,741
-49% -$10.1M 0.02% 793
2021
Q4 		$25.7M Sell
34,058
-7,228
-18% -$5.41M 0.05% 390
2021
Q3 		$30.8M Buy
41,286
+8,241
+25% +$6.17M 0.06% 338
2021
Q2 		$21.3M Sell
33,045
-12,395
-27% -$7.54M 0.04% 444
2021
Q1 		$26M Sell
45,440
-1,451
-3% -$859K 0.06% 363
2020
Q4 		$27.3M Buy
46,891
+960
+2% +$547K 0.06% 321
2020
Q3 		$23.7M Buy
45,931
+12,134
+36% +$6.15M 0.06% 331
2020
Q2 		$15.3M Sell
33,797
-4,312
-11% -$1.9M 0.04% 434
2020
Q1 		$13.4M Buy
38,109
+19,186
+101% +$7.05M 0.04% 419
2019
Q4 		$7M Buy
18,923
+15,915
+529% +$5.61M 0.02% 824
2019
Q3 		$1M Sell
3,008
-17
-0.6% -$5.55K ﹤0.01% 1144
2019
Q2 		$946K Sell
3,025
-920
-23% -$275K ﹤0.01% 1158
2019
Q1 		$1.21M Sell
3,945
-110
-3% -$29.7K ﹤0.01% 1109
2018
Q4 		$942K Hold
4,055
– – ﹤0.01% 1151
2018
Q3 		$1.27M Sell
4,055
-90
-2% -$27.9K ﹤0.01% 1130
2018
Q2 		$1.2M Sell
4,145
-60
-1% -$16.6K ﹤0.01% 1109
2018
Q1 		$1.05M Sell
4,205
-117
-3% -$29.8K ﹤0.01% 1120
2017
Q4 		$1.03M Buy
4,322
+56
+1% +$13.6K ﹤0.01% 1110
2017
Q3 		$948K Buy
4,266
+79
+2% +$17.8K ﹤0.01% 1111
2017
Q2 		$948K Buy
4,187
+40
+1% +$8.72K ﹤0.01% 1102
2017
Q1 		$827K Sell
4,147
-7,223
-64% -$1.39M ﹤0.01% 1074
2016
Q4 		$2.07M Sell
11,370
-1,980
-15% -$338K 0.01% 1027
2016
Q3 		$2.19M Sell
13,350
-200
-1% -$30.4K 0.01% 1082
2016
Q2 		$1.94M Sell
13,550
-860
-6% -$123K 0.01% 1095
2016
Q1 		$1.97M Sell
14,410
-660
-4% -$86.6K 0.01% 1084
2015
Q4 		$2.09M Sell
15,070
-360
-2% -$49.9K 0.01% 1081
2015
Q3 		$2.07M Sell
15,430
-420
-3% -$60.4K 0.01% 1101
2015
Q2 		$2.39M Buy
15,850
+80
+0.5% +$11.4K 0.01% 1130
2015
Q1 		$2.13M Sell
15,770
-410
-3% -$50.8K 0.01% 1147
2014
Q4 		$1.95M Buy
16,180
+900
+6% +$104K 0.01% 1172
2014
Q3 		$1.73M Buy
15,280
+120
+0.8% +$14.2K 0.01% 1202
2014
Q2 		$1.81M Buy
15,160
+520
+4% +$63.5K 0.01% 1212
2014
Q1 		$1.88M Sell
14,640
-40
-0.3% -$5.13K 0.01% 1162
2013
Q4 		$1.81M Sell
14,680
-380
-3% -$46.3K 0.01% 1154
2013
Q3 		$1.77M Sell
15,060
-1,160
-7% -$137K 0.01% 1144
2013
Q2 		$1.82M Buy
+16,220
New +$1.9M 0.01% 1129

Other funds holding BIO

First Eagle Investment Management
First Eagle Investment Management New York $59.9B AUM 27.01% 1-Year Est. Return
BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Dimensional Fund Advisors
Dimensional Fund Advisors Austin, Texas $481B AUM 30.42% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
AI
Ariel Investments Chicago, Illinois $8.93B AUM 29.58% 1-Year Est. Return
EARNEST Partners
EARNEST Partners Atlanta, Georgia $24.3B AUM 34.41% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Capital World Investors
Capital World Investors Los Angeles, California $733B AUM 35.63% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.37T AUM 24.88% 1-Year Est. Return

State of Wisconsin Investment Board's BIO Position: Q1 2026 in Review

State of Wisconsin Investment Board reduced its Bio-Rad Laboratories Class A (BIO) stake by 4.2% in Q1 2026, selling an estimated $165K and leaving 13,074 shares worth $3.64M. The position accounts for 0.01% of the portfolio, ranked #1117.

State of Wisconsin Investment Board first reported a position in BIO in Q2 2013 and has held it in 52 quarters since. The position peaked at $30.8M in Q3 2021. 393 funds tracked by Wall St. Rank hold BIO as of Q1 2026.

  • State of Wisconsin Investment Board held 13,074 shares of Bio-Rad Laboratories Class A worth $3.64M as of Q1 2026.
  • State of Wisconsin Investment Board sold 574 Bio-Rad Laboratories Class A shares in Q1 2026, an estimated $165K.
  • Bio-Rad Laboratories Class A made up 0.01% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #1117 holding.
  • State of Wisconsin Investment Board first reported a position in Bio-Rad Laboratories Class A in Q2 2013 and has held it in 52 quarters since.
  • State of Wisconsin Investment Board's Bio-Rad Laboratories Class A position peaked at $30.8M in Q3 2021.
  • 393 funds tracked by Wall St. Rank held Bio-Rad Laboratories Class A as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.