PEAK6’s MarketAxess Holdings MKTX Stock Holding History

PEAK6’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 Q3	–	Sell	-800	Closed	-$179K	–	3264
2025 Q2	$179K	Buy	+800	New	+$176K	﹤0.01%	2487

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

PEAK6's MKTX Position: Q1 2026 in Review

PEAK6 opened a new position in MarketAxess Holdings (MKTX) in Q1 2026: 2,290 shares worth $378K. The stake represents ﹤0.01% of the portfolio and ranks #2085 among its holdings. This is a return to the name: PEAK6 previously reported a position in MKTX as recently as Q2 2025.

PEAK6 first reported a position in MKTX in Q2 2025 and has held it in 2 quarters since. 447 funds tracked by Wall St. Rank hold MKTX as of Q1 2026.

PEAK6 held 2,290 shares of MarketAxess Holdings worth $378K as of Q1 2026.
MarketAxess Holdings was a new PEAK6 position in Q1 2026.
MarketAxess Holdings made up ﹤0.01% of PEAK6's portfolio in Q1 2026, its #2085 holding.
PEAK6 first reported a position in MarketAxess Holdings in Q2 2025 and has held it in 2 quarters since.
447 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q1 2026.

Based on PEAK6's 13F filing for Q1 2026, filed 14 May 2026.