Citadel Advisors’s MarketAxess Holdings MKTX Stock Holding History

Citadel Advisors’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	$3.22M	Sell	19,500 -13,700	-41%	-$2.4M	﹤0.01%	5121
2025 Q4	$6.02M	Sell	33,200 -36,300	-52%	-$6.19M	﹤0.01%	3998
2025 Q3	$12.1M	Buy	69,500 +10,400	+18%	+$2.03M	﹤0.01%	2977
2025 Q2	$13.2M	Buy	59,100 +37,900	+179%	+$8.33M	﹤0.01%	2662
2025 Q1	$4.59M	Sell	21,200 -16,300	-43%	-$3.42M	﹤0.01%	4013
2024 Q4	$8.48M	Buy	37,500 +12,500	+50%	+$3.29M	﹤0.01%	3198
2024 Q3	$6.41M	Buy	25,000 +9,900	+66%	+$2.32M	﹤0.01%	3553
2024 Q2	$3.03M	Sell	15,100 -16,900	-53%	-$3.48M	﹤0.01%	4548
2024 Q1	$7.02M	Buy	32,000 +6,900	+27%	+$1.63M	﹤0.01%	3442
2023 Q4	$7.35M	Sell	25,100 -12,300	-33%	-$2.97M	﹤0.01%	3246
2023 Q3	$7.99M	Buy	37,400 +27,000	+260%	+$6.54M	﹤0.01%	2966
2023 Q2	$2.72M	Sell	10,400 -54,700	-84%	-$16.3M	﹤0.01%	4635
2023 Q1	$25.5M	Buy	65,100 +44,700	+219%	+$15.8M	0.01%	1689
2022 Q4	$5.69M	Sell	20,400 -10,800	-35%	-$2.78M	﹤0.01%	3639
2022 Q3	$6.94M	Buy	31,200 +9,800	+46%	+$2.51M	﹤0.01%	3331
2022 Q2	$5.48M	Sell	21,400 -11,500	-35%	-$3.15M	﹤0.01%	3623
2022 Q1	$11.2M	Sell	32,900 -32,900	-50%	-$11.9M	﹤0.01%	2777
2021 Q4	$27.1M	Buy	65,800 +32,000	+95%	+$12.6M	0.01%	1705
2021 Q3	$14.2M	Buy	33,800 +10,100	+43%	+$4.63M	﹤0.01%	2499
2021 Q2	$11M	Sell	23,700 -1,600	-6%	-$762K	﹤0.01%	2940
2021 Q1	$12.6M	Sell	25,300 -3,400	-12%	-$1.81M	﹤0.01%	2634
2020 Q4	$16.4M	Sell	28,700 -4,600	-14%	-$2.51M	﹤0.01%	2023
2020 Q3	$16M	Sell	33,300 -19,100	-36%	-$9.44M	﹤0.01%	1768
2020 Q2	$26.2M	Buy	52,400 +31,200	+147%	+$14.5M	0.01%	1270
2020 Q1	$7.05M	Sell	21,200 -9,800	-32%	-$3.41M	﹤0.01%	2283
2019 Q4	$11.8M	Sell	31,000 -10,800	-26%	-$3.96M	0.01%	2032
2019 Q3	$13.7M	Buy	41,800 +25,800	+161%	+$9.23M	0.01%	1866
2019 Q2	$5.14M	Buy	16,000 +12,400	+344%	+$3.58M	﹤0.01%	3041
2019 Q1	$886K	Buy	3,600 +1,700	+89%	+$385K	﹤0.01%	5802
2018 Q4	$401K	Sell	1,900 -3,100	-62%	-$642K	﹤0.01%	6762
2018 Q3	$892K	Buy	5,000 +2,200	+79%	+$423K	﹤0.01%	5746
2018 Q2	$554K	Sell	2,800 -3,800	-58%	-$788K	﹤0.01%	6198
2018 Q1	$1.44M	Buy	6,600 +300	+5%	+$61.7K	﹤0.01%	4244
2017 Q4	$1.27M	Buy	+6,300	New	+$1.19M	﹤0.01%	4303
2017 Q3	–	Sell	-5,000	Closed	-$1.01M	–	7829
2017 Q2	$1.01M	Buy	5,000 +500	+11%	+$95.8K	﹤0.01%	4061
2017 Q1	$844K	Buy	4,500 +1,000	+29%	+$181K	﹤0.01%	4246
2016 Q4	$514K	Sell	3,500 -9,800	-74%	-$1.56M	﹤0.01%	4856
2016 Q3	$2.2M	Buy	13,300 +3,400	+34%	+$552K	﹤0.01%	2857
2016 Q2	$1.44M	Buy	9,900 +2,500	+34%	+$332K	﹤0.01%	3117
2016 Q1	$924K	Sell	7,400 -2,600	-26%	-$297K	﹤0.01%	3590
2015 Q4	$1.12M	Buy	10,000 +2,100	+27%	+$215K	﹤0.01%	3434
2015 Q3	$734K	Sell	7,900 -100	-1%	-$9.67K	﹤0.01%	4236
2015 Q2	$742K	Buy	8,000 +7,100	+789%	+$626K	﹤0.01%	4383
2015 Q1	$75K	Buy	900 +600	+200%	+$47.5K	﹤0.01%	7092
2014 Q4	$22K	Sell	300 -2,100	-88%	-$138K	﹤0.01%	7734
2014 Q3	$148K	Buy	2,400 +100	+4%	+$5.63K	﹤0.01%	6034
2014 Q2	$124K	Buy	+2,300	New	+$126K	﹤0.01%	6046

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

Citadel Advisors's MKTX Position: Q1 2026 in Review

Citadel Advisors reduced its MarketAxess Holdings (MKTX) stake by 87% in Q1 2026, selling an estimated $95.1M and leaving 82,159 shares worth $13.6M. The position accounts for ﹤0.01% of the portfolio, ranked #2817.

Citadel Advisors first reported a position in MKTX in Q2 2013 and has held it in 51 quarters since. The position peaked at $124M in Q2 2022. 448 funds tracked by Wall St. Rank hold MKTX as of Q1 2026.

Citadel Advisors held 82,159 shares of MarketAxess Holdings worth $13.6M as of Q1 2026.
Citadel Advisors sold 543,049 MarketAxess Holdings shares in Q1 2026, an estimated $95.1M.
MarketAxess Holdings made up ﹤0.01% of Citadel Advisors's portfolio in Q1 2026, its #2817 holding.
Citadel Advisors first reported a position in MarketAxess Holdings in Q2 2013 and has held it in 51 quarters since.
Citadel Advisors's MarketAxess Holdings position peaked at $124M in Q2 2022.
448 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q1 2026.

Based on Citadel Advisors's 13F filing for Q1 2026, filed 15 May 2026.