JO
MASI

John Overdeck’s Masimo MASI Stock Holding History

John Overdeck’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
2022
Q1 		– Sell
-6,500
Closed -$1.9M – 3643
2021
Q4 		$1.9M Buy
6,500
+1,000
+18% +$285K ﹤0.01% 1956
2021
Q3 		$1.49M Sell
5,500
-800
-13% -$217K ﹤0.01% 2250
2021
Q2 		$1.53M Buy
6,300
+3,800
+152% +$867K ﹤0.01% 2116
2021
Q1 		$574K Sell
2,500
-300
-11% -$75.4K ﹤0.01% 2805
2020
Q4 		$751K Sell
2,800
-1,900
-40% -$474K ﹤0.01% 2210
2020
Q3 		$1.11M Buy
+4,700
New +$1.05M ﹤0.01% 1685

Other funds holding MASI

BlackRock
BlackRock New York $6.73T AUM 46.02% 1-Year Est. Return
Fidelity Investments
Fidelity Investments Boston, Massachusetts $2.3T AUM 54.33% 1-Year Est. Return
Vanguard Group
Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return
PCM
Politan Capital Management New York $255M AUM 62.37% 1-Year Est. Return
Massachusetts Financial Services
Massachusetts Financial Services Boston, Massachusetts $315B AUM 27.84% 1-Year Est. Return
T. Rowe Price Investment Management
T. Rowe Price Investment Management Baltimore, Maryland $153B AUM 38.14% 1-Year Est. Return
Capital Research Global Investors
Capital Research Global Investors Los Angeles, California $717B AUM 35.42% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $3.37T AUM 44.26% 1-Year Est. Return
Westfield Capital Management
Westfield Capital Management Boston, Massachusetts $30.6B AUM 61.81% 1-Year Est. Return
Alyeska Investment Group
Alyeska Investment Group Chicago, Illinois $38.9B AUM 28.51% 1-Year Est. Return

John Overdeck's MASI Position: Q3 2025 in Review

John Overdeck sold out of Masimo (MASI) in Q3 2025, closing a stake of 15,465 shares — an estimated $2.6M sold.

John Overdeck first reported a position in MASI in Q2 2014 and held it in 39 quarters. The position peaked at $86.6M in Q1 2022. 358 funds tracked by Wall St. Rank hold MASI as of Q3 2025.

  • John Overdeck reported no remaining Masimo position as of Q3 2025 after selling out during the quarter.
  • John Overdeck sold 15,465 Masimo shares in Q3 2025, an estimated $2.6M.
  • John Overdeck first reported a position in Masimo in Q2 2014 and held it in 39 quarters.
  • John Overdeck's Masimo position peaked at $86.6M in Q1 2022.
  • 358 funds tracked by Wall St. Rank held Masimo as of Q3 2025.

Based on Two Sigma Investments's 13F filing for Q3 2025, filed 14 Nov 2025.