NCMU
MASI

NAYA Capital Management (UK)’s Masimo MASI Stock Holding History

NAYA Capital Management (UK)’s Portfolio MASI Stock Details MASI Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		– Sell
-1,560,697
Closed -$203M – 5
2025
Q4 		$203M Buy
+1,560,697
New +$223M 15.28% 5

Other funds holding MASI

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PCM
Politan Capital Management New York $985M AUM 3.12% 1-Year Est. Return
PCM
Pentwater Capital Management Naples, Florida $19.3B AUM 58.13% 1-Year Est. Return
Barclays
Barclays London, United Kingdom $416B AUM 33.63% 1-Year Est. Return
HI
HBK Investments Dallas, Texas $9.85B AUM 55.6% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T 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

NAYA Capital Management (UK)'s MASI Position: Q1 2026 in Review

NAYA Capital Management (UK) sold out of Masimo (MASI) in Q1 2026, closing a stake of 1,560,697 shares — an estimated $203M sold.

NAYA Capital Management (UK) first reported a position in MASI in Q4 2025 and held it in 1 quarter. The position peaked at $203M in Q4 2025. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • NAYA Capital Management (UK) reported no remaining Masimo position as of Q1 2026 after selling out during the quarter.
  • NAYA Capital Management (UK) sold 1,560,697 Masimo shares in Q1 2026, an estimated $203M.
  • NAYA Capital Management (UK) first reported a position in Masimo in Q4 2025 and held it in 1 quarter.
  • NAYA Capital Management (UK)'s Masimo position peaked at $203M in Q4 2025.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on NAYA Capital Management (UK)'s 13F filing for Q1 2026, filed 15 May 2026.