PAMP
MASI

Polar Asset Management Partners’s Masimo MASI Stock Holding History

Polar Asset Management Partners’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 		$4.45M Buy
+25,000
New +$3.92M 0.09% 230
2024
Q1 		– Sell
-24,300
Closed -$2.85M – 842
2023
Q4 		$2.85M Buy
+24,300
New +$2.26M 0.05% 322

Other funds holding MASI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
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 $315B AUM 27.84% 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

Polar Asset Management Partners's MASI Position: Q1 2026 in Review

Polar Asset Management Partners opened a new position in Masimo (MASI) in Q1 2026: 232,026 shares worth $41.3M. The stake represents 0.82% of the portfolio and ranks #21 among its holdings. This is a return to the name: Polar Asset Management Partners previously reported a position in MASI as recently as Q4 2023.

Polar Asset Management Partners first reported a position in MASI in Q4 2023 and has held it in 2 quarters since. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Polar Asset Management Partners held 232,026 shares of Masimo worth $41.3M as of Q1 2026.
  • Masimo was a new Polar Asset Management Partners position in Q1 2026.
  • Masimo made up 0.82% of Polar Asset Management Partners's portfolio in Q1 2026, its #21 holding.
  • Polar Asset Management Partners first reported a position in Masimo in Q4 2023 and has held it in 2 quarters since.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Polar Asset Management Partners's 13F filing for Q1 2026, filed 15 May 2026.