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MASI

Masimo
MASI

Delisted

MASI was delisted on the 9th of June, 2026.

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

MASI Hedge Fund Activity: Q1 2026 in Review

445 of the 8,132 institutional investors tracked by Wall St. Rank reported a position in Masimo (MASI) for Q1 2026, worth a combined $9.48B — up 31% from $7.24B a quarter earlier.

Buyers outnumbered sellers: 132 funds opened new MASI positions and 71 closed out — a net gain of 61 holders — while 139 added to existing stakes and 106 trimmed.

The largest buyer was Pentwater Capital Management, opening a new position worth an estimated $498M. The largest seller was Fidelity Investments, cutting an estimated $1.01B.

  • 445 institutional investors held Masimo (MASI) as of Q1 2026, up from 390 in Q4 2025.
  • Funds reported $9.48B of Masimo stock for Q1 2026, up 31% quarter-over-quarter.
  • 132 funds opened new Masimo positions in Q1 2026 and 71 closed out, a net change of +61 holders.
  • The largest Masimo buyer in Q1 2026 was Pentwater Capital Management, an estimated $498M added.
  • The largest Masimo seller in Q1 2026 was Fidelity Investments, an estimated $1.01B sold.

Based on aggregated 13F filings for Q1 2026.