WCMNY
MASI

Westchester Capital Management (New York)’s Masimo MASI Stock Holding History

Westchester Capital Management (New York)’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 		$24.6M Buy
+138,428
New +$21.7M 1.12% 15

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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

Westchester Capital Management (New York)'s MASI Position: Q1 2026 in Review

Westchester Capital Management (New York) opened a new position in Masimo (MASI) in Q1 2026: 138,428 shares worth $24.6M. The stake represents 1.12% of the portfolio and ranks #15 among its holdings.

445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Westchester Capital Management (New York) held 138,428 shares of Masimo worth $24.6M as of Q1 2026.
  • Masimo was a new Westchester Capital Management (New York) position in Q1 2026.
  • Masimo made up 1.12% of Westchester Capital Management (New York)'s portfolio in Q1 2026, its #15 holding.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Westchester Capital Management (New York)'s 13F filing for Q1 2026, filed 15 May 2026.