Mariner
MKTX icon

Mariner’s MarketAxess Holdings MKTX Stock Holding History

Mariner’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 		$5.08M Sell
44,790
-34,354
-43% -$4.89M 0.01% 1027
2026
Q1 		$13.1M Buy
79,144
+19,884
+34% +$3.48M 0.02% 635
2025
Q4 		$10.7M Buy
59,260
+46,940
+381% +$8.01M 0.01% 677
2025
Q3 		$2.15M Buy
12,320
+1,330
+12% +$260K ﹤0.01% 1382
2025
Q2 		$2.45M Buy
10,990
+6,581
+149% +$1.45M ﹤0.01% 1218
2025
Q1 		$954K Buy
4,409
+1,468
+50% +$308K ﹤0.01% 1719
2024
Q4 		$665K Buy
2,941
+206
+8% +$54.2K ﹤0.01% 1951
2024
Q3 		$701K Buy
2,735
+279
+11% +$65.4K ﹤0.01% 1878
2024
Q2 		$493K Sell
2,456
-590
-19% -$122K ﹤0.01% 2061
2024
Q1 		$668K Sell
3,046
-481
-14% -$114K ﹤0.01% 1815
2023
Q4 		$1.03M Buy
3,527
+241
+7% +$58.3K ﹤0.01% 1411
2023
Q3 		$702K Sell
3,286
-742
-18% -$180K ﹤0.01% 1546
2023
Q2 		$1.05M Sell
4,028
-144
-3% -$43K ﹤0.01% 1276
2023
Q1 		$1.63M Buy
4,172
+75
+2% +$26.6K ﹤0.01% 1046
2022
Q4 		$1.14M Buy
4,097
+1,841
+82% +$474K ﹤0.01% 1168
2022
Q3 		$502K Buy
+2,256
New +$579K ﹤0.01% 1417
2019
Q3 		– Sell
-1,757
Closed -$565K – 914
2019
Q2 		$565K Sell
1,757
-562
-24% -$162K 0.01% 685
2019
Q1 		$571K Buy
+2,319
New +$525K 0.01% 626

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

Mariner's MKTX Position: Q2 2026 in Review

Mariner reduced its MarketAxess Holdings (MKTX) stake by 43% in Q2 2026, selling an estimated $4.89M and leaving 44,790 shares worth $5.08M. The position accounts for 0.01% of the portfolio, ranked #1027.

Mariner first reported a position in MKTX in Q1 2019 and has held it in 18 quarters since. The position peaked at $13.1M in Q1 2026. 396 funds tracked by Wall St. Rank hold MKTX as of Q2 2026.

  • Mariner held 44,790 shares of MarketAxess Holdings worth $5.08M as of Q2 2026.
  • Mariner sold 34,354 MarketAxess Holdings shares in Q2 2026, an estimated $4.89M.
  • MarketAxess Holdings made up 0.01% of Mariner's portfolio in Q2 2026, its #1027 holding.
  • Mariner first reported a position in MarketAxess Holdings in Q1 2019 and has held it in 18 quarters since.
  • Mariner's MarketAxess Holdings position peaked at $13.1M in Q1 2026.
  • 396 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q2 2026.

Based on Mariner's 13F filing for Q2 2026, filed 13 Aug 2026.