Headlands Technologies’s MarketAxess Holdings MKTX Stock Holding History

Headlands Technologies’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	-12,127	Closed	-$2.11M	–	793
2025 Q3	$2.11M	Buy	12,127 +9,022	+291%	+$1.76M	0.17%	135
2025 Q2	$693K	Sell	3,105 -3,311	-52%	-$728K	0.08%	249
2025 Q1	$1.39M	Buy	6,416 +3,658	+133%	+$768K	0.16%	145
2024 Q4	$623K	Sell	2,758 -331	-11%	-$87.1K	0.06%	303
2024 Q3	$791K	Sell	3,089 -1,912	-38%	-$448K	0.09%	239
2024 Q2	$1M	Buy	5,001 +4,682	+1,468%	+$965K	0.11%	168
2024 Q1	$69.9K	Sell	319 -260	-45%	-$61.4K	0.02%	623
2023 Q4	$170K	Sell	579 -433	-43%	-$105K	0.05%	304
2023 Q3	$216K	Sell	1,012 -293	-22%	-$71K	0.11%	189
2023 Q2	$341K	Buy	1,305 +568	+77%	+$169K	0.11%	212
2023 Q1	$288K	Buy	+737	New	+$261K	0.19%	97

Other funds holding MKTX

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

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

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

NRCM

North Reef Capital Management Laguna Beach, California $2.91B AUM 11.03% 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

GAM

GuardCap Asset Management London, United Kingdom $1.75B AUM 7.74% 1-Year Est. Return

Bank of Montreal Toronto, Ontario, Canada $269B AUM 31.4% 1-Year Est. Return

Headlands Technologies's MKTX Position: Q4 2025 in Review

Headlands Technologies sold out of MarketAxess Holdings (MKTX) in Q4 2025, closing a stake of 12,127 shares — an estimated $2.11M sold.

Headlands Technologies first reported a position in MKTX in Q1 2023 and held it in 11 quarters. The position peaked at $2.11M in Q3 2025. 485 funds tracked by Wall St. Rank hold MKTX as of Q4 2025.

Headlands Technologies reported no remaining MarketAxess Holdings position as of Q4 2025 after selling out during the quarter.
Headlands Technologies sold 12,127 MarketAxess Holdings shares in Q4 2025, an estimated $2.11M.
Headlands Technologies first reported a position in MarketAxess Holdings in Q1 2023 and held it in 11 quarters.
Headlands Technologies's MarketAxess Holdings position peaked at $2.11M in Q3 2025.
485 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q4 2025.

Based on Headlands Technologies's 13F filing for Q4 2025, filed 13 Feb 2026.