State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s MarketAxess Holdings MKTX Stock Holding History

State of Wisconsin Investment Board’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 		$5.85M Buy
35,472
+2,082
+6% +$365K 0.01% 920
2025
Q4 		$6.05M Sell
33,390
-1,333
-4% -$227K 0.01% 933
2025
Q3 		$6.05M Sell
34,723
-5,257
-13% -$1.03M 0.01% 877
2025
Q2 		$8.93M Buy
39,980
+4,969
+14% +$1.09M 0.02% 692
2025
Q1 		$7.57M Buy
35,011
+6,253
+22% +$1.31M 0.02% 753
2024
Q4 		$6.5M Buy
28,758
+4,591
+19% +$1.21M 0.02% 838
2024
Q3 		$6.19M Sell
24,167
-3,940
-14% -$923K 0.02% 865
2024
Q2 		$5.64M Sell
28,107
-2,390
-8% -$493K 0.01% 872
2024
Q1 		$6.69M Buy
30,497
+4,198
+16% +$992K 0.02% 843
2023
Q4 		$7.7M Sell
26,299
-15,186
-37% -$3.67M 0.02% 770
2023
Q3 		$8.86M Buy
41,485
+2,149
+5% +$521K 0.03% 625
2023
Q2 		$10.3M Buy
39,336
+3,199
+9% +$954K 0.03% 587
2023
Q1 		$14.1M Buy
36,137
+12,870
+55% +$4.56M 0.04% 443
2022
Q4 		$6.49M Sell
23,267
-4,648
-17% -$1.2M 0.02% 788
2022
Q3 		$6.21M Sell
27,915
-3,614
-11% -$927K 0.02% 815
2022
Q2 		$8.07M Buy
31,529
+1,144
+4% +$313K 0.02% 745
2022
Q1 		$10.3M Buy
30,385
+9,969
+49% +$3.61M 0.02% 770
2021
Q4 		$8.4M Buy
20,416
+787
+4% +$310K 0.02% 851
2021
Q3 		$8.26M Sell
19,629
-2,768
-12% -$1.27M 0.02% 844
2021
Q2 		$10.4M Sell
22,397
-3,251
-13% -$1.55M 0.02% 739
2021
Q1 		$12.8M Buy
25,648
+53
+0.2% +$28.3K 0.03% 632
2020
Q4 		$14.6M Buy
25,595
+1,265
+5% +$689K 0.03% 529
2020
Q3 		$11.7M Buy
24,330
+670
+3% +$331K 0.03% 578
2020
Q2 		$11.9M Buy
23,660
+3,740
+19% +$1.74M 0.03% 518
2020
Q1 		$6.63M Sell
19,920
-5,890
-23% -$2.05M 0.02% 654
2019
Q4 		$9.79M Sell
25,810
-1,673
-6% -$614K 0.02% 687
2019
Q3 		$9M Sell
27,483
-1,798
-6% -$644K 0.02% 657
2019
Q2 		$9.41M Buy
29,281
+22,418
+327% +$6.48M 0.03% 626
2019
Q1 		$1.69M Sell
6,863
-185
-3% -$41.9K ﹤0.01% 1038
2018
Q4 		$1.49M Buy
7,048
+10
+0.1% +$2.07K ﹤0.01% 1023
2018
Q3 		$1.26M Sell
7,038
-140
-2% -$26.9K ﹤0.01% 1136
2018
Q2 		$1.42M Sell
7,178
-181
-2% -$37.5K ﹤0.01% 1065
2018
Q1 		$1.6M Sell
7,359
-168
-2% -$34.6K ﹤0.01% 1005
2017
Q4 		$1.52M Buy
7,527
+60
+0.8% +$11.3K ﹤0.01% 1014
2017
Q3 		$1.38M Buy
7,467
+132
+2% +$25.3K ﹤0.01% 1020
2017
Q2 		$1.48M Sell
7,335
-720
-9% -$138K ﹤0.01% 979
2017
Q1 		$1.51M Sell
8,055
-12,745
-61% -$2.31M 0.01% 938
2016
Q4 		$3.06M Sell
20,800
-3,740
-15% -$594K 0.01% 881
2016
Q3 		$4.06M Sell
24,540
-80
-0.3% -$13K 0.02% 836
2016
Q2 		$3.58M Buy
+24,620
New +$3.27M 0.01% 863

Other funds holding MKTX

BlackRock
BlackRock New York $6.73T AUM 46.02% 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 $3.37T AUM 44.26% 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

State of Wisconsin Investment Board's MKTX Position: Q1 2026 in Review

State of Wisconsin Investment Board increased its MarketAxess Holdings (MKTX) stake by 6.2% in Q1 2026, buying an estimated $365K and bringing the position to 35,472 shares worth $5.85M. The position accounts for 0.01% of the portfolio, ranked #920.

State of Wisconsin Investment Board first reported a position in MKTX in Q2 2016 and has held it in 40 quarters since. The position peaked at $14.6M in Q4 2020. 450 funds tracked by Wall St. Rank hold MKTX as of Q1 2026.

  • State of Wisconsin Investment Board held 35,472 shares of MarketAxess Holdings worth $5.85M as of Q1 2026.
  • State of Wisconsin Investment Board bought 2,082 MarketAxess Holdings shares in Q1 2026, an estimated $365K.
  • MarketAxess Holdings made up 0.01% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #920 holding.
  • State of Wisconsin Investment Board first reported a position in MarketAxess Holdings in Q2 2016 and has held it in 40 quarters since.
  • State of Wisconsin Investment Board's MarketAxess Holdings position peaked at $14.6M in Q4 2020.
  • 450 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.