Millennium Management’s Masimo MASI Stock Holding History

Millennium 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
2025 Q2	–	Sell	-10,000	Closed	-$1.67M	–	6151
2025 Q1	$1.67M	Buy	+10,000	New	+$1.74M	﹤0.01%	3952
2024 Q4	–	Sell	-2,700	Closed	-$360K	–	6239
2024 Q3	$360K	Buy	2,700 +400	+17%	+$46.4K	﹤0.01%	5083
2024 Q2	$290K	Sell	2,300 -3,000	-57%	-$395K	﹤0.01%	4937
2024 Q1	$778K	Buy	+5,300	New	+$684K	﹤0.01%	4512
2023 Q4	–	Sell	-45,400	Closed	-$3.98M	–	6346
2023 Q3	$3.98M	Buy	+45,400	New	+$5.28M	﹤0.01%	2916
2023 Q2	–	Sell	-7,000	Closed	-$1.29M	–	6464
2023 Q1	$1.29M	Buy	+7,000	New	+$1.18M	﹤0.01%	3855
2022 Q4	–	Sell	-7,000	Closed	-$988K	–	6834
2022 Q3	$988K	Sell	7,000 -28,300	-80%	-$4.13M	﹤0.01%	4356
2022 Q2	$4.61M	Buy	35,300 +20,900	+145%	+$2.8M	﹤0.01%	2891
2022 Q1	$2.1M	Sell	14,400 -25,600	-64%	-$4.92M	﹤0.01%	3831
2021 Q4	$11.7M	Buy	40,000 +35,000	+700%	+$9.97M	0.01%	1974
2021 Q3	$1.35M	Sell	5,000 -15,000	-75%	-$4.07M	﹤0.01%	4352
2021 Q2	$4.85M	Buy	20,000 +15,000	+300%	+$3.42M	﹤0.01%	2795
2021 Q1	$1.15M	Buy	+5,000	New	+$1.26M	﹤0.01%	4086
2020 Q2	–	Sell	-5,000	Closed	-$886K	–	4422
2020 Q1	$886K	Buy	+5,000	New	+$858K	﹤0.01%	2542
2019 Q4	–	Sell	-2,000	Closed	-$297K	–	4470
2019 Q3	$297K	Buy	+2,000	New	+$304K	﹤0.01%	3576
2019 Q2	–	Sell	-30,000	Closed	-$4.15M	–	4299
2019 Q1	$4.15M	Buy	+30,000	New	+$3.77M	0.01%	1897
2018 Q3	–	Sell	-15,000	Closed	-$1.47M	–	4127
2018 Q2	$1.47M	Sell	15,000 -35,000	-70%	-$3.33M	﹤0.01%	2612
2018 Q1	$4.4M	Buy	+50,000	New	+$4.36M	0.01%	1890

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

Millennium Management's MASI Position: Q1 2026 in Review

Millennium Management increased its Masimo (MASI) stake by 426% in Q1 2026, buying an estimated $126M and bringing the position to 988,853 shares worth $176M. The position accounts for 0.07% of the portfolio, ranked #241.

Millennium Management first reported a position in MASI in Q2 2013 and has held it in 50 quarters since. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

Millennium Management held 988,853 shares of Masimo worth $176M as of Q1 2026.
Millennium Management bought 800,888 Masimo shares in Q1 2026, an estimated $126M.
Masimo made up 0.07% of Millennium Management's portfolio in Q1 2026, its #241 holding.
Millennium Management first reported a position in Masimo in Q2 2013 and has held it in 50 quarters since.
445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

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