Magnetar Financial’s MarketAxess Holdings MKTX Stock Holding History

Magnetar Financial’s Portfolio MKTX Stock Details MKTX Fund Activity

Bought

Maintained

Sold

Quarter	Market Value	Status	Shares	Change in Stake	Trade Value	Portfolio Weight	Portfolio Position
2025 Q4	–	Sell	-16,232	Closed	-$2.83M	–	1115
2025 Q3	$2.83M	Sell	16,232 -15,649	-49%	-$3.06M	0.02%	319
2025 Q2	$7.12M	Buy	31,881 +23,674	+288%	+$5.2M	0.03%	197
2025 Q1	$1.78M	Sell	8,207 -9,355	-53%	-$1.97M	0.02%	286
2024 Q4	$3.97M	Buy	17,562 +15,389	+708%	+$4.05M	0.09%	162
2024 Q3	$557K	Buy	+2,173	New	+$509K	0.01%	331
2023 Q3	–	Sell	-9,653	Closed	-$2.52M	–	529
2023 Q2	$2.52M	Buy	+9,653	New	+$2.88M	0.06%	188
2022 Q3	–	Sell	-2,344	Closed	-$600K	–	1446
2022 Q2	$600K	Buy	2,344 +216	+10%	+$59.1K	0.01%	1096
2022 Q1	$724K	Buy	+2,128	New	+$771K	0.01%	859
2021 Q3	–	Sell	-2,100	Closed	-$974K	–	1439
2021 Q2	$974K	Buy	+2,100	New	+$1,000K	0.01%	735
2020 Q4	–	Sell	-1,029	Closed	-$496K	–	829
2020 Q3	$496K	Buy	+1,029	New	+$509K	0.01%	445
2013 Q4	–	Sell	-10,921	Closed	-$656K	–	332
2013 Q3	$656K	Buy	+10,921	New	+$584K	0.01%	350

Other funds holding MKTX

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

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

Primecap Management Pasadena, California $169B AUM 114.72% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return

NRCM

North Reef Capital Management Laguna Beach, California $2.61B AUM 11.5% 1-Year Est. Return

State Street Boston, Massachusetts $3.38T AUM 44.17% 1-Year Est. Return

VanEck Associates New York $164B AUM 112.45% 1-Year Est. Return

GAM

GuardCap Asset Management London, United Kingdom $1.41B AUM 8.17% 1-Year Est. Return

Bank of Montreal Toronto, Ontario, Canada $304B AUM 35.64% 1-Year Est. Return

Magnetar Financial's MKTX Position: Q4 2025 in Review

Magnetar Financial sold out of MarketAxess Holdings (MKTX) in Q4 2025, closing a stake of 16,232 shares — an estimated $2.83M sold.

Magnetar Financial first reported a position in MKTX in Q3 2013 and held it in 11 quarters. The position peaked at $7.12M in Q2 2025. 487 funds tracked by Wall St. Rank hold MKTX as of Q4 2025.

Magnetar Financial reported no remaining MarketAxess Holdings position as of Q4 2025 after selling out during the quarter.
Magnetar Financial sold 16,232 MarketAxess Holdings shares in Q4 2025, an estimated $2.83M.
Magnetar Financial first reported a position in MarketAxess Holdings in Q3 2013 and held it in 11 quarters.
Magnetar Financial's MarketAxess Holdings position peaked at $7.12M in Q2 2025.
487 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q4 2025.

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