Janus Henderson Group
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Janus Henderson Group’s MarketAxess Holdings MKTX Stock Holding History

Janus Henderson Group’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 		$27.8M Buy
168,797
+350
+0.2% +$61.3K 0.01% 536
2025
Q4 		$30.5M Buy
168,447
+23,253
+16% +$3.97M 0.01% 515
2025
Q3 		$25.3M Buy
145,194
+9,157
+7% +$1.79M 0.01% 555
2025
Q2 		$30.4M Buy
136,037
+20,361
+18% +$4.48M 0.01% 489
2025
Q1 		$25.1M Buy
115,676
+71,966
+165% +$15.1M 0.01% 518
2024
Q4 		$9.88M Buy
43,710
+40,501
+1,262% +$10.7M 0.01% 735
2024
Q3 		$822K Sell
3,209
-314
-9% -$73.6K ﹤0.01% 1771
2024
Q2 		$707K Sell
3,523
-10,617
-75% -$2.19M ﹤0.01% 1807
2024
Q1 		$3.1M Buy
14,140
+9,539
+207% +$2.25M ﹤0.01% 1077
2023
Q4 		$1.35M Sell
4,601
-27
-0.6% -$6.53K ﹤0.01% 1469
2023
Q3 		$989K Sell
4,628
-249
-5% -$60.4K ﹤0.01% 1562
2023
Q2 		$1.27M Sell
4,877
-438
-8% -$131K ﹤0.01% 1485
2023
Q1 		$2.08M Sell
5,315
-2,243
-30% -$794K ﹤0.01% 1240
2022
Q4 		$2.11M Sell
7,558
-1,065
-12% -$274K ﹤0.01% 1080
2022
Q3 		$1.92M Sell
8,623
-462
-5% -$119K ﹤0.01% 1322
2022
Q2 		$2.33M Buy
9,085
+1,416
+18% +$387K ﹤0.01% 1000
2022
Q1 		$2.61M Sell
7,669
-1,977
-20% -$717K ﹤0.01% 1156
2021
Q4 		$3.97M Buy
9,646
+2,146
+29% +$846K ﹤0.01% 1122
2021
Q3 		$3.15M Sell
7,500
-6,284
-46% -$2.88M ﹤0.01% 1155
2021
Q2 		$6.39M Sell
13,784
-44,867
-76% -$21.4M ﹤0.01% 1013
2021
Q1 		$29.2M Sell
58,651
-16,160
-22% -$8.62M 0.01% 687
2020
Q4 		$42.7M Sell
74,811
-18,097
-19% -$9.86M 0.02% 578
2020
Q3 		$44.7M Sell
92,908
-2,161
-2% -$1.07M 0.02% 525
2020
Q2 		$47.6M Sell
95,069
-184,637
-66% -$86M 0.03% 500
2020
Q1 		$93M Sell
279,706
-99,265
-26% -$34.6M 0.06% 300
2019
Q4 		$144M Sell
378,971
-182,002
-32% -$66.8M 0.07% 276
2019
Q3 		$184M Buy
560,973
+114,697
+26% +$41.1M 0.1% 218
2019
Q2 		$143M Sell
446,276
-154,342
-26% -$44.6M 0.08% 284
2019
Q1 		$148M Sell
600,618
-27,010
-4% -$6.12M 0.08% 283
2018
Q4 		$133M Sell
627,628
-50,000
-7% -$10.3M 0.08% 281
2018
Q3 		$121M Sell
677,628
-2,707
-0.4% -$520K 0.06% 341
2018
Q2 		$135M Buy
680,335
+14,096
+2% +$2.92M 0.08% 309
2018
Q1 		$145M Sell
666,239
-4,277
-0.6% -$880K 0.09% 274
2017
Q4 		$135M Buy
670,516
+10,254
+2% +$1.93M 0.08% 286
2017
Q3 		$122M Sell
660,262
-146,826
-18% -$28.1M 0.08% 316
2017
Q2 		$162M Buy
807,088
+517,309
+179% +$99.1M 0.11% 241
2017
Q1 		$54.3M Sell
289,779
-13,325
-4% -$2.42M 0.38% 60
2016
Q4 		$44.5M Sell
303,104
-9,587
-3% -$1.52M 0.33% 73
2016
Q3 		$51.8M Sell
312,691
-67,093
-18% -$10.9M 0.38% 62
2016
Q2 		$55.2M Buy
379,784
+132,064
+53% +$17.6M 0.46% 45
2016
Q1 		$30.9M Sell
247,720
-26,139
-10% -$2.98M 0.25% 111
2015
Q4 		$30.6M Buy
273,859
+10,263
+4% +$1.05M 0.25% 110
2015
Q3 		$24.5M Sell
263,596
-30,871
-10% -$2.98M 0.22% 131
2015
Q2 		$27.3M Sell
294,467
-22,273
-7% -$1.96M 0.21% 133
2015
Q1 		$32.8M Sell
316,740
-5,316
-2% -$421K 0.25% 102
2014
Q4 		$23.1M Buy
+322,056
New +$21.2M 0.17% 172

Other funds holding MKTX

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Primecap Management
Primecap Management Pasadena, California $127B AUM 44.11% 1-Year Est. Return
AQR Capital Management
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
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
VanEck Associates
VanEck Associates New York $133B AUM 72.99% 1-Year Est. Return
Millennium Management
Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Janus Henderson Group's MKTX Position: Q1 2026 in Review

Janus Henderson Group increased its MarketAxess Holdings (MKTX) stake by 0.21% in Q1 2026, buying an estimated $61.3K and bringing the position to 168,797 shares worth $27.8M. The position accounts for 0.01% of the portfolio, ranked #536.

Janus Henderson Group first reported a position in MKTX in Q4 2014 and has held it in 46 quarters since. The position peaked at $184M in Q3 2019. 447 funds tracked by Wall St. Rank hold MKTX as of Q1 2026.

  • Janus Henderson Group held 168,797 shares of MarketAxess Holdings worth $27.8M as of Q1 2026.
  • Janus Henderson Group bought 350 MarketAxess Holdings shares in Q1 2026, an estimated $61.3K.
  • MarketAxess Holdings made up 0.01% of Janus Henderson Group's portfolio in Q1 2026, its #536 holding.
  • Janus Henderson Group first reported a position in MarketAxess Holdings in Q4 2014 and has held it in 46 quarters since.
  • Janus Henderson Group's MarketAxess Holdings position peaked at $184M in Q3 2019.
  • 447 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q1 2026.

Based on Janus Henderson Group's 13F filing for Q1 2026, filed 15 May 2026.