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MASI

Parkman Healthcare Partners’s Masimo MASI Stock Holding History

Parkman Healthcare 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 		– Sell
-200,000
Closed -$26M – 102
2025
Q4 		$26M Buy
+200,000
New +$28.6M 2.48% 10
2020
Q4 		– Sell
-35,000
Closed -$8.26M – 89
2020
Q3 		$8.26M Buy
+35,000
New +$7.85M 2.19% 14

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 $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

Parkman Healthcare Partners's MASI Position: Q1 2026 in Review

Parkman Healthcare Partners sold out of Masimo (MASI) in Q1 2026, closing a stake of 200,000 shares — an estimated $26M sold.

Parkman Healthcare Partners first reported a position in MASI in Q3 2020 and held it in 2 quarters. The position peaked at $26M in Q4 2025. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Parkman Healthcare Partners reported no remaining Masimo position as of Q1 2026 after selling out during the quarter.
  • Parkman Healthcare Partners sold 200,000 Masimo shares in Q1 2026, an estimated $26M.
  • Parkman Healthcare Partners first reported a position in Masimo in Q3 2020 and held it in 2 quarters.
  • Parkman Healthcare Partners's Masimo position peaked at $26M in Q4 2025.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Parkman Healthcare Partners's 13F filing for Q1 2026, filed 15 May 2026.