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Rossby Financial’s MarketAxess Holdings MKTX Stock Holding History

Rossby Financial’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 		$2.48K Buy
15
+9
+150% +$1.58K ﹤0.01% 1750
2025
Q4 		$1.09K Sell
6
-1
-14% -$171 ﹤0.01% 1505
2025
Q3 		$1.2K Buy
+7
New +$1.37K ﹤0.01% 1250

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

Rossby Financial's MKTX Position: Q1 2026 in Review

Rossby Financial increased its MarketAxess Holdings (MKTX) stake by 150% in Q1 2026, buying an estimated $1.58K and bringing the position to 15 shares worth $2.48K. The position accounts for ﹤0.01% of the portfolio, ranked #1750.

Rossby Financial first reported a position in MKTX in Q3 2025 and has held it in 3 quarters since. 447 funds tracked by Wall St. Rank hold MKTX as of Q1 2026.

  • Rossby Financial held 15 shares of MarketAxess Holdings worth $2.48K as of Q1 2026.
  • Rossby Financial bought 9 MarketAxess Holdings shares in Q1 2026, an estimated $1.58K.
  • MarketAxess Holdings made up ﹤0.01% of Rossby Financial's portfolio in Q1 2026, its #1750 holding.
  • Rossby Financial first reported a position in MarketAxess Holdings in Q3 2025 and has held it in 3 quarters since.
  • 447 funds tracked by Wall St. Rank held MarketAxess Holdings as of Q1 2026.

Based on Rossby Financial's 13F filing for Q1 2026, filed 11 May 2026.