Twin Tree Management
MASI

Twin Tree Management’s Masimo MASI Stock Holding History

Twin Tree Management’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
2024
Q3 		– Sell
-51,800
Closed -$6.52M – 1677
2024
Q2 		$6.52M Hold
51,800
– – 0.01% 680
2024
Q1 		$7.61M Buy
+51,800
New +$6.69M 0.02% 714
2023
Q2 		– Sell
-37,500
Closed -$6.92M – 1414
2023
Q1 		$6.92M Buy
+37,500
New +$6.33M 0.01% 666
2020
Q1 		– Sell
-13,600
Closed -$2.15M – 1522
2019
Q4 		$2.15M Buy
13,600
+8,600
+172% +$1.29M 0.01% 703
2019
Q3 		$744K Buy
+5,000
New +$759K ﹤0.01% 866

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
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $645B AUM 30.41% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
Holocene Advisors
Holocene Advisors New York $41.5B AUM 42.97% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $23.8B AUM 49.45% 1-Year Est. Return

Twin Tree Management's MASI Position: Q2 2025 in Review

Twin Tree Management sold out of Masimo (MASI) in Q2 2025, closing a stake of 175 shares — an estimated $29.2K sold.

Twin Tree Management first reported a position in MASI in Q2 2017 and held it in 17 quarters. The position peaked at $13.2M in Q4 2023. 378 funds tracked by Wall St. Rank hold MASI as of Q2 2025.

  • Twin Tree Management reported no remaining Masimo position as of Q2 2025 after selling out during the quarter.
  • Twin Tree Management sold 175 Masimo shares in Q2 2025, an estimated $29.2K.
  • Twin Tree Management first reported a position in Masimo in Q2 2017 and held it in 17 quarters.
  • Twin Tree Management's Masimo position peaked at $13.2M in Q4 2023.
  • 378 funds tracked by Wall St. Rank held Masimo as of Q2 2025.

Based on Twin Tree Management's 13F filing for Q2 2025, filed 28 Jul 2025.