Politan Capital Management’s Masimo MASI Stock Holding History

Politan Capital 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	$816M	Hold	4,589,648	–	–	82.89%	1
2025 Q4	$597M	Hold	4,589,648	–	–	71.01%	1
2025 Q3	$677M	Sell	4,589,648 -126,888	-3%	-$19.2M	61.54%	1
2025 Q2	$793M	Buy	4,716,536 +1,790	+0%	+$286K	56.98%	1
2025 Q1	$785M	Hold	4,714,746	–	–	53.37%	1
2024 Q4	$779M	Hold	4,714,746	–	–	50.51%	1
2024 Q3	$629M	Hold	4,714,746	–	–	35.5%	2
2024 Q2	$594M	Buy	4,714,746 +1,228	+0%	+$162K	36.18%	2
2024 Q1	$692M	Hold	4,713,518	–	–	36%	2
2023 Q4	$552M	Hold	4,713,518	–	–	31.54%	2
2023 Q3	$413M	Hold	4,713,518	–	–	28%	2
2023 Q2	$776M	Sell	4,713,518 -26,445	-0.6%	-$4.6M	45.96%	2
2023 Q1	$875M	Hold	4,739,963	–	–	50.83%	1
2022 Q4	$701M	Buy	4,739,963 +91,094	+2%	+$12.5M	39.47%	2
2022 Q3	$656M	Buy	+4,648,869	New	+$679M	39.51%	2

Other funds holding MASI

BlackRock New York $5.72T AUM 30.48% 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

Millennium Management New York $240B AUM 35.51% 1-Year Est. Return

Politan Capital Management's MASI Position: Q1 2026 in Review

Politan Capital Management held its Masimo (MASI) position steady in Q1 2026 at 4,589,648 shares worth $816M. The position accounts for 82.89% of the portfolio, ranked #1.

Politan Capital Management first reported a position in MASI in Q3 2022 and has held it in 15 quarters since. The position peaked at $875M in Q1 2023. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

Politan Capital Management held 4,589,648 shares of Masimo worth $816M as of Q1 2026.
Politan Capital Management left its Masimo share count unchanged in Q1 2026.
Masimo made up 82.89% of Politan Capital Management's portfolio in Q1 2026, its #1 holding.
Politan Capital Management first reported a position in Masimo in Q3 2022 and has held it in 15 quarters since.
Politan Capital Management's Masimo position peaked at $875M in Q1 2023.
445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Politan Capital Management's 13F filing for Q1 2026, filed 15 May 2026.