Jane Street
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Jane Street’s MarketAxess Holdings MKTX Stock Holding History

Jane Street’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
-1,400
Closed -$254K – 12451
2025
Q4 		$254K Sell
1,400
-3,400
-71% -$580K ﹤0.01% 9207
2025
Q3 		$836K Buy
4,800
+3,800
+380% +$743K ﹤0.01% 6712
2025
Q2 		$223K Sell
1,000
-100
-9% -$22K ﹤0.01% 8366
2025
Q1 		$238K Buy
+1,100
New +$231K ﹤0.01% 8188
2024
Q4 		– Sell
-11,900
Closed -$3.05M – 10118
2024
Q3 		$3.05M Buy
11,900
+4,500
+61% +$1.05M ﹤0.01% 3688
2024
Q2 		$1.48M Sell
7,400
-1,200
-14% -$247K ﹤0.01% 5031
2024
Q1 		$1.89M Buy
8,600
+900
+12% +$213K ﹤0.01% 4233
2023
Q4 		$2.25M Sell
7,700
-2,700
-26% -$653K ﹤0.01% 4118
2023
Q3 		$2.22M Buy
10,400
+9,400
+940% +$2.28M ﹤0.01% 3874
2023
Q2 		$261K Sell
1,000
-5,900
-86% -$1.76M ﹤0.01% 7327
2023
Q1 		$2.7M Sell
6,900
-1,800
-21% -$637K ﹤0.01% 3320
2022
Q4 		$2.43M Sell
8,700
-15,500
-64% -$3.99M ﹤0.01% 3557
2022
Q3 		$5.38M Buy
24,200
+3,100
+15% +$796K ﹤0.01% 2497
2022
Q2 		$5.4M Sell
21,100
-400
-2% -$109K ﹤0.01% 2550
2022
Q1 		$7.31M Sell
21,500
-500
-2% -$181K ﹤0.01% 2430
2021
Q4 		$9.05M Sell
22,000
-2,900
-12% -$1.14M ﹤0.01% 2011
2021
Q3 		$10.5M Buy
24,900
+16,000
+180% +$7.34M ﹤0.01% 1754
2021
Q2 		$4.13M Sell
8,900
-3,900
-30% -$1.86M ﹤0.01% 2982
2021
Q1 		$6.37M Buy
12,800
+4,900
+62% +$2.61M ﹤0.01% 2058
2020
Q4 		$4.51M Buy
7,900
+1,200
+18% +$654K ﹤0.01% 2265
2020
Q3 		$3.23M Buy
6,700
+2,100
+46% +$1.04M ﹤0.01% 2349
2020
Q2 		$2.3M Sell
4,600
-1,600
-26% -$745K ﹤0.01% 2867
2020
Q1 		$2.06M Sell
6,200
-1,900
-23% -$662K ﹤0.01% 1996
2019
Q4 		$3.07M Sell
8,100
-6,000
-43% -$2.2M ﹤0.01% 1488
2019
Q3 		$4.62M Buy
+14,100
New +$5.05M 0.01% 1056

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

Jane Street's MKTX Position: Q2 2026 in Review

Jane Street increased its MarketAxess Holdings (MKTX) stake by 507% in Q2 2026, buying an estimated $9.21M and bringing the position to 77,353 shares worth $8.78M. The position accounts for ﹤0.01% of the portfolio, ranked #2990.

Jane Street first reported a position in MKTX in Q4 2013 and has held it in 43 quarters since. The position peaked at $29.2M in Q3 2025. 397 funds tracked by Wall St. Rank hold MKTX as of Q2 2026.

  • Jane Street held 77,353 shares of MarketAxess Holdings worth $8.78M as of Q2 2026.
  • Jane Street bought 64,613 MarketAxess Holdings shares in Q2 2026, an estimated $9.21M.
  • MarketAxess Holdings made up ﹤0.01% of Jane Street's portfolio in Q2 2026, its #2990 holding.
  • Jane Street first reported a position in MarketAxess Holdings in Q4 2013 and has held it in 43 quarters since.
  • Jane Street's MarketAxess Holdings position peaked at $29.2M in Q3 2025.
  • 397 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q2 2026.

Based on Jane Street's 13F filing for Q2 2026, filed 14 Aug 2026.