ET
MASI

Entropy Technologies’s Masimo MASI Stock Holding History

Entropy Technologies’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
2025
Q4 		– Sell
-16,809
Closed -$2.48M – 1043
2025
Q3 		$2.48M Buy
16,809
+8,809
+110% +$1.33M 0.19% 153
2025
Q2 		$1.35M Buy
8,000
+6,197
+344% +$990K 0.11% 247
2025
Q1 		$300K Buy
+1,803
New +$313K 0.03% 542
2024
Q1 		– Sell
-6,249
Closed -$732K – 812
2023
Q4 		$732K Buy
+6,249
New +$582K 0.14% 258

Other funds holding MASI

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
PCM
Politan Capital Management New York $985M AUM 3.12% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
NCMU
NAYA Capital Management (UK) London, United Kingdom $1.18B AUM 13.14% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $23.8B AUM 49.45% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return

Entropy Technologies's MASI Position: Q4 2025 in Review

Entropy Technologies sold out of Masimo (MASI) in Q4 2025, closing a stake of 16,809 shares — an estimated $2.48M sold.

Entropy Technologies first reported a position in MASI in Q4 2023 and held it in 4 quarters. The position peaked at $2.48M in Q3 2025. 390 funds tracked by Wall St. Rank hold MASI as of Q4 2025.

  • Entropy Technologies reported no remaining Masimo position as of Q4 2025 after selling out during the quarter.
  • Entropy Technologies sold 16,809 Masimo shares in Q4 2025, an estimated $2.48M.
  • Entropy Technologies first reported a position in Masimo in Q4 2023 and held it in 4 quarters.
  • Entropy Technologies's Masimo position peaked at $2.48M in Q3 2025.
  • 390 funds tracked by Wall St. Rank held Masimo as of Q4 2025.

Based on Entropy Technologies's 13F filing for Q4 2025, filed 13 Feb 2026.