Mitsubishi UFJ Asset Management (UK)’s Masimo MASI Stock Holding History

Mitsubishi UFJ Asset Management (UK)’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 Q4	–	Sell	-8,000	Closed	-$1.18M	–	98
2025 Q3	$1.18M	Hold	8,000	–	–	0.57%	57
2025 Q2	$1.35M	Hold	8,000	–	–	0.7%	44
2025 Q1	$1.33M	Buy	+8,000	New	+$1.39M	0.72%	42
2023 Q3	–	Sell	-2,600	Closed	-$428K	–	99
2023 Q2	$428K	Hold	2,600	–	–	0.28%	84
2023 Q1	$480K	Sell	2,600 -1,000	-28%	-$169K	0.31%	85
2022 Q4	$533K	Buy	3,600 +3,000	+500%	+$413K	0.37%	69
2022 Q3	$85K	Sell	600 -3,000	-83%	-$438K	0.07%	77
2022 Q2	$470K	Hold	3,600	–	–	0.27%	72
2022 Q1	$524K	Buy	3,600 +1,800	+100%	+$346K	0.24%	89
2021 Q4	$527K	Hold	1,800	–	–	0.22%	82
2021 Q3	$487K	Sell	1,800 -3,500	-66%	-$949K	0.21%	85
2021 Q2	$1.28M	Sell	5,300 -1,000	-16%	-$228K	0.56%	62
2021 Q1	$1.45M	Sell	6,300 -2,500	-28%	-$628K	0.64%	57
2020 Q4	$2.36M	Buy	8,800 +6,400	+267%	+$1.6M	1.06%	32
2020 Q3	$567K	Hold	2,400	–	–	0.28%	72
2020 Q2	$547K	Sell	2,400 -3,000	-56%	-$658K	0.29%	72
2020 Q1	$956K	Buy	+5,400	New	+$926K	0.71%	51

Other funds holding MASI

BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return

Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return

PCM

Politan Capital Management New York $985M AUM 3.12% 1-Year Est. Return

Vanguard Group Malvern, Pennsylvania $6.9T AUM 27.45% 1-Year Est. Return

Massachusetts Financial Services Boston, Massachusetts $298B AUM 21.96% 1-Year Est. Return

T. Rowe Price Investment Management Baltimore, Maryland $145B AUM 22.78% 1-Year Est. Return

NCMU

NAYA Capital Management (UK) London, United Kingdom $1.18B AUM 13.14% 1-Year Est. Return

Westfield Capital Management Boston, Massachusetts $23.8B AUM 49.45% 1-Year Est. Return

State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return

Alyeska Investment Group Chicago, Illinois $35.4B AUM 33.54% 1-Year Est. Return

Mitsubishi UFJ Asset Management (UK)'s MASI Position: Q4 2025 in Review

Mitsubishi UFJ Asset Management (UK) sold out of Masimo (MASI) in Q4 2025, closing a stake of 8,000 shares — an estimated $1.18M sold.

Mitsubishi UFJ Asset Management (UK) first reported a position in MASI in Q1 2020 and held it in 17 quarters. The position peaked at $2.36M in Q4 2020. 390 funds tracked by Wall St. Rank hold MASI as of Q4 2025.

Mitsubishi UFJ Asset Management (UK) reported no remaining Masimo position as of Q4 2025 after selling out during the quarter.
Mitsubishi UFJ Asset Management (UK) sold 8,000 Masimo shares in Q4 2025, an estimated $1.18M.
Mitsubishi UFJ Asset Management (UK) first reported a position in Masimo in Q1 2020 and held it in 17 quarters.
Mitsubishi UFJ Asset Management (UK)'s Masimo position peaked at $2.36M in Q4 2020.
390 funds tracked by Wall St. Rank held Masimo as of Q4 2025.

Based on Mitsubishi UFJ Asset Management (UK)'s 13F filing for Q4 2025, filed 6 Feb 2026.