Twin Tree Management
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Twin Tree Management’s Bio-Rad Laboratories Class A BIO Stock Holding History

Twin Tree Management’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
Q2 		– Sell
-357
Closed -$87K – 1614
2025
Q1 		$87K Buy
+357
New +$107K ﹤0.01% 1424
2024
Q1 		– Sell
-28,402
Closed -$9.34M – 1277
2023
Q4 		$9.17M Buy
+28,402
New +$8.9M 0.02% 712
2023
Q1 		– Sell
-1,727
Closed -$726K – 1284
2022
Q4 		$726K Buy
+1,727
New +$697K ﹤0.01% 1072
2021
Q4 		– Sell
-1,392
Closed -$1.04M – 1588
2021
Q3 		$1.04M Buy
+1,392
New +$1.04M ﹤0.01% 1178
2020
Q2 		– Sell
-19
Closed -$7K – 1461
2020
Q1 		$7K Sell
19
-4,941
-100% -$1.82M ﹤0.01% 1270
2019
Q4 		$1.83M Sell
4,960
-3,290
-40% -$1.16M 0.01% 745
2019
Q3 		$2.75M Buy
8,250
+3,679
+80% +$1.2M 0.01% 617
2019
Q2 		$1.43M Sell
4,571
-22,487
-83% -$6.73M 0.01% 727
2019
Q1 		$8.27M Buy
27,058
+23,644
+693% +$6.38M 0.04% 339
2018
Q4 		$793K Buy
+3,414
New +$916K ﹤0.01% 903
2018
Q2 		– Sell
-4,999
Closed -$1.25M – 1142
2018
Q1 		$1.25M Sell
4,999
-1,467
-23% -$374K 0.01% 622
2017
Q4 		$1.54M Buy
+6,466
New +$1.57M 0.01% 635

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
VAM
Veritas Asset Management London, United Kingdom $5.56B AUM 3.46% 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 $3.37T AUM 44.26% 1-Year Est. Return
Bank of America
Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return
FPA
First Pacific Advisors El Segundo, California $8.09B AUM 21.95% 1-Year Est. Return

Twin Tree Management's BIO Position: Q2 2025 in Review

Twin Tree Management sold out of Bio-Rad Laboratories Class A (BIO) in Q2 2025, closing a stake of 357 shares — an estimated $87K sold.

Twin Tree Management first reported a position in BIO in Q4 2017 and held it in 12 quarters. The position peaked at $9.17M in Q4 2023. 384 funds tracked by Wall St. Rank hold BIO as of Q2 2025.

  • Twin Tree Management reported no remaining Bio-Rad Laboratories Class A position as of Q2 2025 after selling out during the quarter.
  • Twin Tree Management sold 357 Bio-Rad Laboratories Class A shares in Q2 2025, an estimated $87K.
  • Twin Tree Management first reported a position in Bio-Rad Laboratories Class A in Q4 2017 and held it in 12 quarters.
  • Twin Tree Management's Bio-Rad Laboratories Class A position peaked at $9.17M in Q4 2023.
  • 384 funds tracked by Wall St. Rank held Bio-Rad Laboratories Class A as of Q2 2025.

Based on Twin Tree Management's 13F filing for Q2 2025, filed 28 Jul 2025.