CSS LLC’s MarketAxess Holdings MKTX Stock Holding History

CSS LLC’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 Q1	–	Sell	-1,120	Closed	-$203K	–	1112
2025 Q4	$203K	Buy	+1,120	New	+$191K	0.01%	766
2019 Q3	–	Sell	-500	Closed	-$161K	–	731
2019 Q2	$161K	Buy	+500	New	+$145K	0.01%	483

Other funds holding MKTX

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return

AQR Capital Management Greenwich, Connecticut $218B AUM 29.41% 1-Year Est. Return

VPM

Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM

NRCM

North Reef Capital Management Laguna Beach, California $2.91B AUM 11.03% 1-Year Est. Return

VCM

Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

VanEck Associates New York $133B AUM 72.99% 1-Year Est. Return

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

CSS LLC's MKTX Position: Q1 2026 in Review

CSS LLC sold out of MarketAxess Holdings (MKTX) in Q1 2026, closing a stake of 1,120 shares — an estimated $203K sold.

CSS LLC first reported a position in MKTX in Q2 2019 and held it in 2 quarters. The position peaked at $203K in Q4 2025. 448 funds tracked by Wall St. Rank hold MKTX as of Q1 2026.

CSS LLC reported no remaining MarketAxess Holdings position as of Q1 2026 after selling out during the quarter.
CSS LLC sold 1,120 MarketAxess Holdings shares in Q1 2026, an estimated $203K.
CSS LLC first reported a position in MarketAxess Holdings in Q2 2019 and held it in 2 quarters.
CSS LLC's MarketAxess Holdings position peaked at $203K in Q4 2025.
448 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q1 2026.

Based on CSS LLC's 13F filing for Q1 2026, filed 15 May 2026.