Aigen Investment Management’s MarketAxess Holdings MKTX Stock Holding History

Aigen Investment Management’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	-1,564	Closed	-$283K	–	686
2025 Q4	$283K	Sell	1,564 -2,520	-62%	-$430K	0.07%	373
2025 Q3	$712K	Buy	4,084 +2,881	+239%	+$564K	0.11%	289
2025 Q2	$269K	Buy	+1,203	New	+$264K	0.04%	570
2024 Q4	–	Sell	-1,992	Closed	-$510K	–	900
2024 Q3	$510K	Sell	1,992 -1,686	-46%	-$395K	0.1%	319
2024 Q2	$738K	Buy	+3,678	New	+$758K	0.14%	198
2023 Q4	–	Sell	-4,917	Closed	-$1.05M	–	964
2023 Q3	$1.05M	Sell	4,917 -146	-3%	-$35.4K	0.2%	153
2023 Q2	$1.32M	Buy	+5,063	New	+$1.51M	0.2%	147
2023 Q1	–	Sell	-1,558	Closed	-$435K	–	738
2022 Q4	$435K	Buy	+1,558	New	+$401K	0.06%	297
2021 Q3	–	Sell	-3,053	Closed	-$1.42M	–	591
2021 Q2	$1.42M	Buy	+3,053	New	+$1.45M	0.25%	115
2020 Q2	–	Sell	-2,302	Closed	-$766K	–	1111
2020 Q1	$766K	Buy	2,302 +2,175	+1,713%	+$758K	0.1%	289
2019 Q4	$48K	Buy	+127	New	+$46.6K	0.01%	811

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

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

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

NRCM

North Reef Capital Management Laguna Beach, California $2.61B AUM 11.5% 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

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

Millennium Management New York $276B AUM 44.8% 1-Year Est. Return

Aigen Investment Management's MKTX Position: Q1 2026 in Review

Aigen Investment Management sold out of MarketAxess Holdings (MKTX) in Q1 2026, closing a stake of 1,564 shares — an estimated $283K sold.

Aigen Investment Management first reported a position in MKTX in Q4 2019 and held it in 11 quarters. The position peaked at $1.42M in Q2 2021. 452 funds tracked by Wall St. Rank hold MKTX as of Q1 2026.

Aigen Investment Management reported no remaining MarketAxess Holdings position as of Q1 2026 after selling out during the quarter.
Aigen Investment Management sold 1,564 MarketAxess Holdings shares in Q1 2026, an estimated $283K.
Aigen Investment Management first reported a position in MarketAxess Holdings in Q4 2019 and held it in 11 quarters.
Aigen Investment Management's MarketAxess Holdings position peaked at $1.42M in Q2 2021.
452 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q1 2026.

Based on Aigen Investment Management's 13F filing for Q1 2026, filed 15 May 2026.