OAM
MASI

Oppenheimer Asset Management’s Masimo MASI Stock Holding History

Oppenheimer Asset 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
2026
Q1 		– Sell
-2,503
Closed -$326K – 1148
2025
Q4 		$326K Sell
2,503
-294
-11% -$42.1K ﹤0.01% 901
2025
Q3 		$413K Buy
2,797
+1,064
+61% +$161K ﹤0.01% 942
2025
Q2 		$292K Sell
1,733
-1,583
-48% -$253K ﹤0.01% 998
2025
Q1 		$552K Sell
3,316
-1,252
-27% -$217K 0.01% 835
2024
Q4 		$755K Buy
4,568
+984
+27% +$155K 0.01% 788
2024
Q3 		$478K Buy
+3,584
New +$416K 0.01% 893
2020
Q2 		– Sell
-607
Closed -$108K – 1284
2020
Q1 		$108K Buy
+607
New +$104K ﹤0.01% 1087
2017
Q4 		– Sell
-7
Closed -$1K – 1306
2017
Q3 		$1K Sell
7
-1
-13% -$88 ﹤0.01% 1649
2017
Q2 		$1K Sell
8
-3
-27% -$275 ﹤0.01% 1638
2017
Q1 		$1K Buy
+11
New +$906 ﹤0.01% 1662

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

Oppenheimer Asset Management's MASI Position: Q1 2026 in Review

Oppenheimer Asset Management sold out of Masimo (MASI) in Q1 2026, closing a stake of 2,503 shares — an estimated $326K sold.

Oppenheimer Asset Management first reported a position in MASI in Q1 2017 and held it in 10 quarters. The position peaked at $755K in Q4 2024. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

  • Oppenheimer Asset Management reported no remaining Masimo position as of Q1 2026 after selling out during the quarter.
  • Oppenheimer Asset Management sold 2,503 Masimo shares in Q1 2026, an estimated $326K.
  • Oppenheimer Asset Management first reported a position in Masimo in Q1 2017 and held it in 10 quarters.
  • Oppenheimer Asset Management's Masimo position peaked at $755K in Q4 2024.
  • 445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Oppenheimer Asset Management's 13F filing for Q1 2026, filed 24 Apr 2026.