Brown Brothers Harriman & Co’s Masimo MASI Stock Holding History

Brown Brothers Harriman & Co’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	$3.02K	Hold	17	–	–	﹤0.01%	1625
2025 Q4	$2.21K	Hold	17	–	–	﹤0.01%	1710
2025 Q3	$2.51K	Hold	17	–	–	﹤0.01%	1545
2025 Q2	$2.86K	Buy	+17	New	+$2.71K	﹤0.01%	1358
2023 Q1	–	Sell	-170	Closed	-$25.2K	–	1305
2022 Q4	$25.2K	Sell	170 -16	-9%	-$2.2K	﹤0.01%	833
2022 Q3	$26K	Buy	186 +16	+9%	+$2.34K	﹤0.01%	896
2022 Q2	$22K	Hold	170	–	–	﹤0.01%	861
2022 Q1	$25K	Hold	170	–	–	﹤0.01%	894
2021 Q4	$50	Hold	170	–	–	﹤0.01%	706
2021 Q3	$46	Hold	170	–	–	﹤0.01%	696
2021 Q2	$41	Hold	170	–	–	﹤0.01%	703
2021 Q1	$39	Buy	+170	New	+$42.7K	﹤0.01%	682

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

Brown Brothers Harriman & Co's MASI Position: Q1 2026 in Review

Brown Brothers Harriman & Co held its Masimo (MASI) position steady in Q1 2026 at 17 shares worth $3.02K. The position accounts for ﹤0.01% of the portfolio, ranked #1625.

Brown Brothers Harriman & Co first reported a position in MASI in Q1 2021 and has held it in 12 quarters since. The position peaked at $26K in Q3 2022. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

Brown Brothers Harriman & Co held 17 shares of Masimo worth $3.02K as of Q1 2026.
Brown Brothers Harriman & Co left its Masimo share count unchanged in Q1 2026.
Masimo made up ﹤0.01% of Brown Brothers Harriman & Co's portfolio in Q1 2026, its #1625 holding.
Brown Brothers Harriman & Co first reported a position in Masimo in Q1 2021 and has held it in 12 quarters since.
Brown Brothers Harriman & Co's Masimo position peaked at $26K in Q3 2022.
445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Brown Brothers Harriman & Co's 13F filing for Q1 2026, filed 14 May 2026.