Citigroup’s Masimo MASI Stock Holding History

Citigroup’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
2024 Q4	–	Sell	-47,600	Closed	-$6.35M	–	5904
2024 Q3	$6.35M	Buy	+47,600	New	+$5.52M	﹤0.01%	1654

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

Citigroup's MASI Position: Q1 2026 in Review

Citigroup increased its Masimo (MASI) stake by 340% in Q1 2026, buying an estimated $64.7M and bringing the position to 533,388 shares worth $94.9M. The position accounts for 0.04% of the portfolio, ranked #423.

Citigroup first reported a position in MASI in Q2 2013 and has held it in 52 quarters since. The position peaked at $243M in Q4 2019. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

Citigroup held 533,388 shares of Masimo worth $94.9M as of Q1 2026.
Citigroup bought 412,157 Masimo shares in Q1 2026, an estimated $64.7M.
Masimo made up 0.04% of Citigroup's portfolio in Q1 2026, its #423 holding.
Citigroup first reported a position in Masimo in Q2 2013 and has held it in 52 quarters since.
Citigroup's Masimo position peaked at $243M in Q4 2019.
445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on Citigroup's 13F filing for Q1 2026, filed 11 May 2026.