D.E. Shaw & Co’s Masimo MASI Stock Holding History

D.E. Shaw & 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
2024 Q4	–	Sell	-10,000	Closed	-$1.33M	–	4668
2024 Q3	$1.33M	Hold	10,000	–	–	﹤0.01%	3050
2024 Q2	$1.26M	Hold	10,000	–	–	﹤0.01%	3030
2024 Q1	$1.47M	Sell	10,000 -1,100	-10%	-$142K	﹤0.01%	2845
2023 Q4	$1.3M	Buy	+11,100	New	+$1.03M	﹤0.01%	2956
2022 Q3	–	Sell	-3,300	Closed	-$431K	–	5377
2022 Q2	$431K	Hold	3,300	–	–	﹤0.01%	4181
2022 Q1	$480K	Buy	+3,300	New	+$634K	﹤0.01%	4399
2021 Q4	–	Sell	-10,000	Closed	-$2.71M	–	5571
2021 Q3	$2.71M	Hold	10,000	–	–	﹤0.01%	2728
2021 Q2	$2.42M	Buy	+10,000	New	+$2.28M	﹤0.01%	2751
2020 Q4	–	Sell	-13,900	Closed	-$3.28M	–	4054
2020 Q3	$3.28M	Hold	13,900	–	–	﹤0.01%	2005
2020 Q2	$3.17M	Buy	+13,900	New	+$3.05M	﹤0.01%	2034

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

D.E. Shaw & Co's MASI Position: Q1 2026 in Review

D.E. Shaw & Co reduced its Masimo (MASI) stake by 70% in Q1 2026, selling an estimated $7.26M and leaving 19,789 shares worth $3.52M. The position accounts for ﹤0.01% of the portfolio, ranked #2449.

D.E. Shaw & Co first reported a position in MASI in Q2 2013 and has held it in 41 quarters since. The position peaked at $104M in Q1 2022. 445 funds tracked by Wall St. Rank hold MASI as of Q1 2026.

D.E. Shaw & Co held 19,789 shares of Masimo worth $3.52M as of Q1 2026.
D.E. Shaw & Co sold 46,227 Masimo shares in Q1 2026, an estimated $7.26M.
Masimo made up ﹤0.01% of D.E. Shaw & Co's portfolio in Q1 2026, its #2449 holding.
D.E. Shaw & Co first reported a position in Masimo in Q2 2013 and has held it in 41 quarters since.
D.E. Shaw & Co's Masimo position peaked at $104M in Q1 2022.
445 funds tracked by Wall St. Rank held Masimo as of Q1 2026.

Based on D.E. Shaw & Co's 13F filing for Q1 2026, filed 15 May 2026.