Capstone Investment Advisors
MKTX icon

Capstone Investment Advisors’s MarketAxess Holdings MKTX Stock Holding History

Capstone Investment 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
Q1 		– Sell
-4,182
Closed -$758K – 1760
2025
Q4 		$758K Buy
4,182
+2,949
+239% +$503K ﹤0.01% 980
2025
Q3 		$215K Buy
+1,233
New +$241K ﹤0.01% 1792
2025
Q2 		– Sell
-1,077
Closed -$233K – 1683
2025
Q1 		$233K Buy
1,077
+402
+60% +$84.4K ﹤0.01% 1240
2024
Q4 		$153K Sell
675
-2,421
-78% -$637K ﹤0.01% 1639
2024
Q3 		$793K Buy
3,096
+1,769
+133% +$415K ﹤0.01% 1057
2024
Q2 		$266K Sell
1,327
-1,021
-43% -$211K ﹤0.01% 1642
2024
Q1 		$515K Buy
+2,348
New +$555K ﹤0.01% 1542
2023
Q4 		– Sell
-1,320
Closed -$282K – 2281
2023
Q3 		$282K Buy
+1,320
New +$320K ﹤0.01% 1641
2022
Q3 		– Sell
-261
Closed -$67K – 1727
2022
Q2 		$67K Buy
261
+260
+26,000% +$71.1K ﹤0.01% 1604
2022
Q1 		$0 Buy
+1
New +$362 ﹤0.01% 2121
2021
Q1 		– Sell
-84
Closed -$44.8K – 1863
2020
Q4 		$48K Buy
+84
New +$45.8K ﹤0.01% 1624
2017
Q4 		– Sell
-4,900
Closed -$904K – 595
2017
Q3 		$904K Buy
+4,900
New +$937K 0.03% 228
2017
Q1 		– Sell
-10,909
Closed -$1.6M – 1031
2016
Q4 		$1.6M Buy
+10,909
New +$1.73M 0.05% 324

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

Capstone Investment Advisors's MKTX Position: Q1 2026 in Review

Capstone Investment Advisors sold out of MarketAxess Holdings (MKTX) in Q1 2026, closing a stake of 4,182 shares — an estimated $758K sold.

Capstone Investment Advisors first reported a position in MKTX in Q4 2016 and held it in 13 quarters. The position peaked at $1.6M in Q4 2016. 450 funds tracked by Wall St. Rank hold MKTX as of Q1 2026.

  • Capstone Investment Advisors reported no remaining MarketAxess Holdings position as of Q1 2026 after selling out during the quarter.
  • Capstone Investment Advisors sold 4,182 MarketAxess Holdings shares in Q1 2026, an estimated $758K.
  • Capstone Investment Advisors first reported a position in MarketAxess Holdings in Q4 2016 and held it in 13 quarters.
  • Capstone Investment Advisors's MarketAxess Holdings position peaked at $1.6M in Q4 2016.
  • 450 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q1 2026.

Based on Capstone Investment Advisors's 13F filing for Q1 2026, filed 15 May 2026.