Picton Mahoney Asset Management’s Masimo MASI Stock Holding History

Picton Mahoney 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	$11.6M	Buy	65,000 +54,500	+519%	+$8.55M	0.09%	212
2025 Q4	$1.37M	Sell	10,500 -1,470	-12%	-$210K	0.01%	485
2025 Q3	$1.77M	Sell	11,970 -32,587	-73%	-$4.93M	0.02%	375
2025 Q2	$7.49M	Buy	44,557 +405	+0.9%	+$64.7K	0.08%	227
2025 Q1	$7.36M	Buy	44,152 +1,542	+4%	+$268K	0.13%	164
2024 Q4	$7.04M	Buy	42,610 +28,153	+195%	+$4.45M	0.14%	156
2024 Q3	$1.93M	Sell	14,457 -9,593	-40%	-$1.11M	0.06%	217
2024 Q2	$3.03M	Sell	24,050 -37,940	-61%	-$5M	0.12%	189
2024 Q1	$9.1M	Sell	61,990 -41,047	-40%	-$5.3M	0.27%	103
2023 Q4	$12.1M	Buy	+103,037	New	+$9.6M	0.33%	69

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 $315B AUM 27.84% 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

Picton Mahoney Asset Management's MASI Position: Q1 2026 in Review

Picton Mahoney Asset Management increased its Masimo (MASI) stake by 519% in Q1 2026, buying an estimated $8.55M and bringing the position to 65,000 shares worth $11.6M. The position accounts for 0.09% of the portfolio, ranked #212.

Picton Mahoney Asset Management first reported a position in MASI in Q4 2023 and has held it in 10 quarters since. The position peaked at $12.1M in Q4 2023. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

Picton Mahoney Asset Management held 65,000 shares of Masimo worth $11.6M as of Q1 2026.
Picton Mahoney Asset Management bought 54,500 Masimo shares in Q1 2026, an estimated $8.55M.
Masimo made up 0.09% of Picton Mahoney Asset Management's portfolio in Q1 2026, its #212 holding.
Picton Mahoney Asset Management first reported a position in Masimo in Q4 2023 and has held it in 10 quarters since.
Picton Mahoney Asset Management's Masimo position peaked at $12.1M in Q4 2023.
445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Picton Mahoney Asset Management's 13F filing for Q1 2026, filed 13 May 2026.