Optiver Holding’s Masimo MASI Stock Holding History

Optiver Holding’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	-18	Closed	-$2.34K	–	2571
2025 Q4	$2.34K	Sell	18 -92	-84%	-$13.2K	﹤0.01%	1926
2025 Q3	$16.2K	Sell	110 -14	-11%	-$2.12K	﹤0.01%	1041
2025 Q2	$20.9K	Buy	124 +6	+5%	+$958	﹤0.01%	820
2025 Q1	$19.7K	Buy	118 +74	+168%	+$12.8K	﹤0.01%	714
2024 Q4	$7.27K	Sell	44 -50	-53%	-$7.9K	﹤0.01%	805
2024 Q3	$12.5K	Buy	+94	New	+$10.9K	﹤0.01%	715

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

Optiver Holding's MASI Position: Q1 2026 in Review

Optiver Holding sold out of Masimo (MASI) in Q1 2026, closing a stake of 18 shares — an estimated $2.34K sold.

Optiver Holding first reported a position in MASI in Q3 2024 and held it in 6 quarters. The position peaked at $20.9K in Q2 2025. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

Optiver Holding reported no remaining Masimo position as of Q1 2026 after selling out during the quarter.
Optiver Holding sold 18 Masimo shares in Q1 2026, an estimated $2.34K.
Optiver Holding first reported a position in Masimo in Q3 2024 and held it in 6 quarters.
Optiver Holding's Masimo position peaked at $20.9K in Q2 2025.
445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Optiver Holding's 13F filing for Q1 2026, filed 15 May 2026.