PDT Partners’s MarketAxess Holdings MKTX Stock Holding History

PDT Partners’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 Q2	$3.2M	Buy	28,171 +23,891	+558%	+$3.4M	0.17%	189
2026 Q1	$706K	Hold	4,280	–	–	0.04%	376
2025 Q4	$776K	Buy	+4,280	New	+$730K	0.05%	368
2022 Q4	–	Sell	-1,530	Closed	-$340K	–	795
2022 Q3	$340K	Sell	1,530 -3,801	-71%	-$975K	0.05%	544
2022 Q2	$1.36M	Buy	5,331 +4,131	+344%	+$1.13M	0.12%	279
2022 Q1	$408K	Buy	+1,200	New	+$435K	0.04%	635
2021 Q3	–	Sell	-1,719	Closed	-$797K	–	855
2021 Q2	$797K	Sell	1,719 -6,188	-78%	-$2.95M	0.05%	412
2021 Q1	$3.94M	Sell	7,907 -1,793	-18%	-$956K	0.28%	133
2020 Q4	$5.53M	Sell	9,700 -6,424	-40%	-$3.5M	0.37%	86
2020 Q3	$7.76M	Sell	16,124 -994	-6%	-$491K	0.51%	42
2020 Q2	$8.57M	Buy	17,118 +14,488	+551%	+$6.75M	0.58%	23
2020 Q1	$875K	Buy	+2,630	New	+$916K	0.07%	249
2014 Q3	–	Sell	-23,035	Closed	-$1.25M	–	1472
2014 Q2	$1.25M	Buy	23,035 +18,835	+448%	+$1.03M	0.03%	616
2014 Q1	$249K	Buy	+4,200	New	+$260K	0.01%	1170
2013 Q4	–	Sell	-11,635	Closed	-$699K	–	961
2013 Q3	$699K	Sell	11,635 -13,797	-54%	-$737K	0.02%	911
2013 Q2	$1.19M	Buy	+25,432	New	+$1.09M	0.03%	749

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

NRCM

North Reef Capital Management Laguna Beach, California $2.61B AUM 11.5% 1-Year Est. Return

Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM

AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 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

Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return

Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

PDT Partners's MKTX Position: Q2 2026 in Review

PDT Partners increased its MarketAxess Holdings (MKTX) stake by 558% in Q2 2026, buying an estimated $3.4M and bringing the position to 28,171 shares worth $3.2M. The position accounts for 0.17% of the portfolio, ranked #189.

PDT Partners first reported a position in MKTX in Q2 2013 and has held it in 16 quarters since. The position peaked at $8.57M in Q2 2020. 396 funds tracked by Wall St. Rank hold MKTX as of Q2 2026.

PDT Partners held 28,171 shares of MarketAxess Holdings worth $3.2M as of Q2 2026.
PDT Partners bought 23,891 MarketAxess Holdings shares in Q2 2026, an estimated $3.4M.
MarketAxess Holdings made up 0.17% of PDT Partners's portfolio in Q2 2026, its #189 holding.
PDT Partners first reported a position in MarketAxess Holdings in Q2 2013 and has held it in 16 quarters since.
PDT Partners's MarketAxess Holdings position peaked at $8.57M in Q2 2020.
396 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q2 2026.

Based on PDT Partners's 13F filing for Q2 2026, filed 14 Aug 2026.