OP Asset Management’s Masimo MASI Stock Holding History

OP 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	-8,207	Closed	-$1.07M	–	855
2025 Q4	$1.07M	Buy	8,207 +1,899	+30%	+$272K	0.01%	582
2025 Q3	$931K	Buy	+6,308	New	+$955K	0.01%	606

Other funds holding MASI

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 London, United Kingdom $416B AUM 33.63% 1-Year Est. Return

HBK Investments Dallas, Texas $9.85B AUM 55.6% 1-Year Est. Return

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 Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

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

OP Asset Management sold out of Masimo (MASI) in Q1 2026, closing a stake of 8,207 shares — an estimated $1.07M sold.

OP Asset Management first reported a position in MASI in Q3 2025 and held it in 2 quarters. The position peaked at $1.07M in Q4 2025. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

OP Asset Management reported no remaining Masimo position as of Q1 2026 after selling out during the quarter.
OP Asset Management sold 8,207 Masimo shares in Q1 2026, an estimated $1.07M.
OP Asset Management first reported a position in Masimo in Q3 2025 and held it in 2 quarters.
OP Asset Management's Masimo position peaked at $1.07M in Q4 2025.
445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on OP Asset Management's 13F filing for Q1 2026, filed 9 Apr 2026.