Holocene Advisors
MKTX icon

Holocene Advisors’s MarketAxess Holdings MKTX Stock Holding History

Holocene 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
Q2 		$4.34M Sell
38,269
-5,530
-13% -$788K 0.01% 444
2026
Q1 		$7.23M Sell
43,799
-171,056
-80% -$30M 0.02% 347
2025
Q4 		$38.9M Sell
214,855
-65,590
-23% -$11.2M 0.08% 234
2025
Q3 		$48.9M Buy
280,445
+203,871
+266% +$39.9M 0.11% 179
2025
Q2 		$17.1M Sell
76,574
-174,068
-69% -$38.3M 0.04% 248
2025
Q1 		$54.2M Buy
+250,642
New +$52.6M 0.16% 159
2024
Q4 		– Sell
-5,352
Closed -$1.37M – 835
2024
Q3 		$1.37M Sell
5,352
-134,208
-96% -$31.5M 0.01% 581
2024
Q2 		$28M Buy
+139,560
New +$28.8M 0.12% 185
2024
Q1 		– Sell
-19,740
Closed -$5.78M – 811
2023
Q4 		$5.78M Sell
19,740
-9,580
-33% -$2.32M 0.02% 330
2023
Q3 		$6.26M Buy
+29,320
New +$7.11M 0.03% 355
2023
Q1 		– Sell
-5,356
Closed -$1.49M – 823
2022
Q4 		$1.49M Sell
5,356
-8,173
-60% -$2.1M 0.01% 492
2022
Q3 		$3.01M Sell
13,529
-6,790
-33% -$1.74M 0.02% 340
2022
Q2 		$5.2M Buy
+20,319
New +$5.56M 0.03% 333
2022
Q1 		– Sell
-14,874
Closed -$6.12M – 964
2021
Q4 		$6.12M Sell
14,874
-2,715
-15% -$1.07M 0.03% 291
2021
Q3 		$7.4M Buy
17,589
+1,256
+8% +$576K 0.04% 271
2021
Q2 		$7.57M Buy
16,333
+5,133
+46% +$2.44M 0.04% 246
2021
Q1 		$5.58M Buy
+11,200
New +$5.97M 0.04% 359
2018
Q4 		– Sell
-6,963
Closed -$1.24M – 763
2018
Q3 		$1.24M Buy
+6,963
New +$1.34M 0.02% 163
2018
Q2 		– Sell
-2,183
Closed -$475K – 664
2018
Q1 		$475K Sell
2,183
-1,942
-47% -$400K 0.01% 284
2017
Q4 		$832K Buy
+4,125
New +$778K 0.02% 245

Other funds holding MKTX

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Primecap Management
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
Vanguard Portfolio Management Malvern, Pennsylvania $2.22T AUM
AQR Capital Management
AQR Capital Management Greenwich, Connecticut $287B AUM 42.33% 1-Year Est. Return
Vanguard Capital Management
Vanguard Capital Management Malvern, Pennsylvania $4.68T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Neuberger Berman Group
Neuberger Berman Group New York $150B AUM 40.08% 1-Year Est. Return
Goldman Sachs
Goldman Sachs New York $1.15T AUM 47.82% 1-Year Est. Return

Holocene Advisors's MKTX Position: Q2 2026 in Review

Holocene Advisors reduced its MarketAxess Holdings (MKTX) stake by 13% in Q2 2026, selling an estimated $788K and leaving 38,269 shares worth $4.34M. The position accounts for 0.01% of the portfolio, ranked #444.

Holocene Advisors first reported a position in MKTX in Q4 2017 and has held it in 20 quarters since. The position peaked at $54.2M in Q1 2025. 395 funds tracked by Wall St. Rank hold MKTX as of Q2 2026.

  • Holocene Advisors held 38,269 shares of MarketAxess Holdings worth $4.34M as of Q2 2026.
  • Holocene Advisors sold 5,530 MarketAxess Holdings shares in Q2 2026, an estimated $788K.
  • MarketAxess Holdings made up 0.01% of Holocene Advisors's portfolio in Q2 2026, its #444 holding.
  • Holocene Advisors first reported a position in MarketAxess Holdings in Q4 2017 and has held it in 20 quarters since.
  • Holocene Advisors's MarketAxess Holdings position peaked at $54.2M in Q1 2025.
  • 395 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q2 2026.

Based on Holocene Advisors's 13F filing for Q2 2026, filed 14 Aug 2026.