Pentwater Capital Management’s Masimo MASI Stock Holding History

Pentwater Capital Management’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 Q2	–	Sell	-3,176,000	Closed	-$565M	–	110
2026 Q1	$565M	Buy	+3,176,000	New	+$498M	2.93%	10

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

Pentwater Capital Management's MASI Position: Q2 2026 in Review

Pentwater Capital Management sold out of Masimo (MASI) in Q2 2026, closing a stake of 3,176,000 shares — an estimated $565M sold.

Pentwater Capital Management first reported a position in MASI in Q1 2026 and held it in 1 quarter. The position peaked at $565M in Q1 2026. 2 funds tracked by Wall St. Rank hold MASI as of Q2 2026.

Pentwater Capital Management reported no remaining Masimo position as of Q2 2026 after selling out during the quarter.
Pentwater Capital Management sold 3,176,000 Masimo shares in Q2 2026, an estimated $565M.
Pentwater Capital Management first reported a position in Masimo in Q1 2026 and held it in 1 quarter.
Pentwater Capital Management's Masimo position peaked at $565M in Q1 2026.
2 funds tracked by Wall St. Rank held Masimo as of Q2 2026.

Based on Pentwater Capital Management's 13F filing for Q2 2026, filed 14 Aug 2026.