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MarketAxess Holdings
MKTX

Fund managers haven’t disclosed any holdings of MKTX yet.

MKTX Hedge Fund Activity: Q1 2026 in Review

447 of the 8,125 institutional investors tracked by Wall St. Rank reported a position in MarketAxess Holdings (MKTX) for Q1 2026, worth a combined $6.31B — down 4.7% from $6.62B a quarter earlier.

Sellers outnumbered buyers: 89 funds closed out of MKTX and 61 opened new positions — a net loss of 28 holders — while 151 trimmed existing stakes and 180 added.

The largest buyer was Millennium Management, adding an estimated $138M. The largest seller was Citadel Advisors, cutting an estimated $95.1M.

  • 447 institutional investors held MarketAxess Holdings (MKTX) as of Q1 2026, down from 485 in Q4 2025.
  • Funds reported $6.31B of MarketAxess Holdings stock for Q1 2026, down 4.7% quarter-over-quarter.
  • 61 funds opened new MarketAxess Holdings positions in Q1 2026 and 89 closed out, a net change of -28 holders.
  • The largest MarketAxess Holdings buyer in Q1 2026 was Millennium Management, an estimated $138M added.
  • The largest MarketAxess Holdings seller in Q1 2026 was Citadel Advisors, an estimated $95.1M sold.

Based on aggregated 13F filings for Q1 2026.