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Magnetar Financial’s Bio-Rad Laboratories Class A BIO Stock Holding History

Magnetar Financial’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
2025
Q4 		– Sell
-10,425
Closed -$2.92M – 950
2025
Q3 		$2.92M Buy
+10,425
New +$2.84M 0.02% 310
2024
Q4 		– Sell
-3,283
Closed -$1.1M – 621
2024
Q3 		$1.1M Buy
+3,283
New +$1.04M 0.02% 278
2024
Q1 		– Sell
-4,336
Closed -$1.4M – 380
2023
Q4 		$1.4M Buy
4,336
+2,163
+100% +$678K 0.04% 232
2023
Q3 		$779K Sell
2,173
-734
-25% -$283K 0.02% 277
2023
Q2 		$1.1M Buy
+2,907
New +$1.18M 0.02% 264
2022
Q1 		– Sell
-1,220
Closed -$922K – 1338
2021
Q4 		$922K Buy
+1,220
New +$913K 0.01% 826
2021
Q2 		– Sell
-2,549
Closed -$1.46M – 1212
2021
Q1 		$1.46M Buy
+2,549
New +$1.51M 0.01% 622
2020
Q4 		– Sell
-414
Closed -$213K – 731
2020
Q3 		$213K Sell
414
-1,640
-80% -$831K ﹤0.01% 598
2020
Q2 		$927K Buy
+2,054
New +$906K 0.03% 195
2019
Q2 		– Sell
-737
Closed -$225K – 452
2019
Q1 		$225K Sell
737
-3,726
-83% -$1.01M 0.01% 363
2018
Q4 		$1.04M Buy
+4,463
New +$1.2M 0.03% 117
2018
Q1 		– Sell
-2,231
Closed -$532K – 590
2017
Q4 		$532K Sell
2,231
-3,568
-62% -$865K 0.01% 378
2017
Q3 		$1.29M Buy
5,799
+1,676
+41% +$377K 0.02% 224
2017
Q2 		$933K Buy
4,123
+1,941
+89% +$423K 0.01% 382
2017
Q1 		$435K Buy
+2,182
New +$420K 0.01% 499
2016
Q3 		– Sell
-2,752
Closed -$394K – 546
2016
Q2 		$394K Buy
2,752
+961
+54% +$137K 0.01% 261
2016
Q1 		$245K Buy
+1,791
New +$235K ﹤0.01% 336
2013
Q4 		– Sell
-4,842
Closed -$569K – 238
2013
Q3 		$569K Buy
+4,842
New +$571K 0.01% 376

Other funds holding BIO

First Eagle Investment Management
First Eagle Investment Management New York $60.8B AUM 26.63% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 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 $552B AUM 44.19% 1-Year Est. Return
AI
Ariel Investments Chicago, Illinois $10B AUM 42.59% 1-Year Est. Return
EARNEST Partners
EARNEST Partners Atlanta, Georgia $27.7B AUM 52.44% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return
VAM
Veritas Asset Management London, United Kingdom $5.56B AUM 3.46% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

Magnetar Financial's BIO Position: Q4 2025 in Review

Magnetar Financial sold out of Bio-Rad Laboratories Class A (BIO) in Q4 2025, closing a stake of 10,425 shares — an estimated $2.92M sold.

Magnetar Financial first reported a position in BIO in Q3 2013 and held it in 18 quarters. The position peaked at $2.92M in Q3 2025. 399 funds tracked by Wall St. Rank hold BIO as of Q4 2025.

  • Magnetar Financial reported no remaining Bio-Rad Laboratories Class A position as of Q4 2025 after selling out during the quarter.
  • Magnetar Financial sold 10,425 Bio-Rad Laboratories Class A shares in Q4 2025, an estimated $2.92M.
  • Magnetar Financial first reported a position in Bio-Rad Laboratories Class A in Q3 2013 and held it in 18 quarters.
  • Magnetar Financial's Bio-Rad Laboratories Class A position peaked at $2.92M in Q3 2025.
  • 399 funds tracked by Wall St. Rank held Bio-Rad Laboratories Class A as of Q4 2025.

Based on Magnetar Financial's 13F filing for Q4 2025, filed 17 Feb 2026.