David Shaw’s Masimo MASI Stock Holding History

David Shaw’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	-7,900	Closed	-$1.05M	–	4666
2024 Q3	$1.05M	Hold	7,900	–	–	﹤0.01%	3238
2024 Q2	$995K	Hold	7,900	–	–	﹤0.01%	3212
2024 Q1	$1.16M	Hold	7,900	–	–	﹤0.01%	2995
2023 Q4	$926K	Buy	+7,900	New	+$736K	﹤0.01%	3181
2021 Q3	–	Sell	-26,600	Closed	-$6.45M	–	5109
2021 Q2	$6.45M	Hold	26,600	–	–	0.01%	1842
2021 Q1	$6.11M	Buy	+26,600	New	+$6.68M	0.01%	1702
2020 Q4	–	Sell	-10,000	Closed	-$2.36M	–	4052
2020 Q3	$2.36M	Hold	10,000	–	–	﹤0.01%	2278
2020 Q2	$2.28M	Buy	+10,000	New	+$2.19M	﹤0.01%	2315

Other funds holding MASI

IFP Advisors Tampa, Florida $5.54B AUM 27.43% 1-Year Est. Return

HNB

Huntington National Bank Columbus, Ohio $20.6B AUM 34.61% 1-Year Est. Return

David Shaw's MASI Position: Q2 2026 in Review

David Shaw sold out of Masimo (MASI) in Q2 2026, closing a stake of 19,789 shares — an estimated $3.52M sold.

David Shaw first reported a position in MASI in Q2 2013 and held it in 41 quarters. The position peaked at $104M in Q1 2022. 2 funds tracked by Wall St. Rank hold MASI as of Q2 2026.

David Shaw reported no remaining Masimo position as of Q2 2026 after selling out during the quarter.
David Shaw sold 19,789 Masimo shares in Q2 2026, an estimated $3.52M.
David Shaw first reported a position in Masimo in Q2 2013 and held it in 41 quarters.
David Shaw's Masimo position peaked at $104M in Q1 2022.
2 funds tracked by Wall St. Rank held Masimo as of Q2 2026.

Based on D.E. Shaw & Co's 13F filing for Q2 2026, filed 14 Aug 2026.