XTX Topco’s Bio-Rad Laboratories Class A BIO Stock Holding History

XTX Topco’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 Q2	$2.03M	Buy	+6,903	New	+$1.96M	0.03%	1088
2026 Q1	–	Sell	-16,108	Closed	-$4.88M	–	3853
2025 Q4	$4.88M	Buy	+16,108	New	+$5.03M	0.13%	136
2025 Q3	–	Sell	-12,774	Closed	-$3.08M	–	2586
2025 Q2	$3.08M	Buy	12,774 +8,207	+180%	+$1.94M	0.13%	180
2025 Q1	$1.11M	Buy	4,567 +2,618	+134%	+$788K	0.06%	501
2024 Q4	$640K	Buy	+1,949	New	+$662K	0.05%	564
2024 Q3	–	Sell	-3,389	Closed	-$926K	–	2104
2024 Q2	$926K	Buy	+3,389	New	+$986K	0.08%	391
2024 Q1	–	Sell	-1,650	Closed	-$533K	–	1855
2023 Q4	$533K	Buy	+1,650	New	+$517K	0.12%	217
2023 Q3	–	Sell	-860	Closed	-$326K	–	1573
2023 Q2	$326K	Sell	860 -391	-31%	-$159K	0.06%	654
2023 Q1	$599K	Buy	+1,251	New	+$586K	0.13%	203
2022 Q4	–	Sell	-719	Closed	-$300K	–	1136
2022 Q3	$300K	Buy	+719	New	+$358K	0.07%	503
2021 Q3	–	Sell	-822	Closed	-$530K	–	702
2021 Q2	$530K	Buy	+822	New	+$500K	0.18%	156

Other funds holding BIO

First Eagle Investment Management New York $60.8B AUM 26.63% 1-Year Est. Return

BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return

Dimensional Fund Advisors Austin, Texas $552B AUM 44.19% 1-Year Est. Return

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

Ariel Investments Chicago, Illinois $10B AUM 42.59% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

EARNEST Partners Atlanta, Georgia $27.7B AUM 52.44% 1-Year Est. Return

State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return

Bank of America Charlotte, North Carolina $1.55T AUM 33.47% 1-Year Est. Return

Capital World Investors Los Angeles, California $846B AUM 46.74% 1-Year Est. Return

XTX Topco's BIO Position: Q2 2026 in Review

XTX Topco opened a new position in Bio-Rad Laboratories Class A (BIO) in Q2 2026: 6,903 shares worth $2.03M. The stake represents 0.03% of the portfolio and ranks #1088 among its holdings. This is a return to the name: XTX Topco previously reported a position in BIO as recently as Q4 2025.

XTX Topco first reported a position in BIO in Q2 2021 and has held it in 11 quarters since. The position peaked at $4.88M in Q4 2025. 398 funds tracked by Wall St. Rank hold BIO as of Q2 2026.

XTX Topco held 6,903 shares of Bio-Rad Laboratories Class A worth $2.03M as of Q2 2026.
Bio-Rad Laboratories Class A was a new XTX Topco position in Q2 2026.
Bio-Rad Laboratories Class A made up 0.03% of XTX Topco's portfolio in Q2 2026, its #1088 holding.
XTX Topco first reported a position in Bio-Rad Laboratories Class A in Q2 2021 and has held it in 11 quarters since.
XTX Topco's Bio-Rad Laboratories Class A position peaked at $4.88M in Q4 2025.
398 funds tracked by Wall St. Rank held Bio-Rad Laboratories Class A as of Q2 2026.

Based on XTX Topco's 13F filing for Q2 2026, filed 14 Aug 2026.