XTX Topco’s MarketAxess Holdings MKTX Stock Holding History

XTX Topco’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
2026 Q2	$3.61M	Buy	31,823 +21,995	+224%	+$3.13M	0.05%	595
2026 Q1	$1.62M	Sell	9,828 -4,404	-31%	-$772K	0.03%	1001
2025 Q4	$2.58M	Buy	14,232 +12,909	+976%	+$2.2M	0.07%	415
2025 Q3	$231K	Sell	1,323 -554	-30%	-$108K	0.01%	1727
2025 Q2	$419K	Sell	1,877 -7,654	-80%	-$1.68M	0.02%	1223
2025 Q1	$2.06M	Buy	9,531 +8,254	+646%	+$1.73M	0.11%	250
2024 Q4	$289K	Buy	+1,277	New	+$336K	0.02%	1251
2024 Q1	–	Sell	-1,269	Closed	-$372K	–	2138
2023 Q4	$372K	Sell	1,269 -4,768	-79%	-$1.15M	0.08%	460
2023 Q3	$1.29M	Buy	+6,037	New	+$1.46M	0.22%	48
2021 Q3	–	Sell	-2,228	Closed	-$1.03M	–	919
2021 Q2	$1.03M	Buy	2,228 +1,623	+268%	+$773K	0.35%	37
2021 Q1	$301K	Buy	+605	New	+$323K	0.15%	272

Other funds holding MKTX

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

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

NRCM

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

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

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

Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM

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

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

Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

XTX Topco's MKTX Position: Q2 2026 in Review

XTX Topco increased its MarketAxess Holdings (MKTX) stake by 224% in Q2 2026, buying an estimated $3.13M and bringing the position to 31,823 shares worth $3.61M. The position accounts for 0.05% of the portfolio, ranked #595.

XTX Topco first reported a position in MKTX in Q1 2021 and has held it in 11 quarters since. 397 funds tracked by Wall St. Rank hold MKTX as of Q2 2026.

XTX Topco held 31,823 shares of MarketAxess Holdings worth $3.61M as of Q2 2026.
XTX Topco bought 21,995 MarketAxess Holdings shares in Q2 2026, an estimated $3.13M.
MarketAxess Holdings made up 0.05% of XTX Topco's portfolio in Q2 2026, its #595 holding.
XTX Topco first reported a position in MarketAxess Holdings in Q1 2021 and has held it in 11 quarters since.
397 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q2 2026.

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