Magnetar Financial’s Masimo MASI Stock Holding History

Magnetar Financial’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	-427,081	Closed	-$76M	–	1343
2026 Q1	$76M	Buy	427,081 +421,626	+7,729%	+$66.2M	0.77%	13
2025 Q4	$709K	Buy	+5,455	New	+$781K	0.01%	493
2022 Q2	–	Sell	-7,866	Closed	-$1.15M	–	1762
2022 Q1	$1.15M	Buy	7,866 +6,476	+466%	+$1.24M	0.01%	775
2021 Q4	$407K	Buy	+1,390	New	+$396K	﹤0.01%	1007
2021 Q2	–	Sell	-9,772	Closed	-$2.24M	–	1304
2021 Q1	$2.24M	Buy	+9,772	New	+$2.45M	0.02%	550
2020 Q3	–	Sell	-1,122	Closed	-$256K	–	703
2020 Q2	$256K	Buy	+1,122	New	+$246K	0.01%	360
2017 Q3	–	Sell	-3,487	Closed	-$318K	–	826
2017 Q2	$318K	Buy	+3,487	New	+$320K	﹤0.01%	562
2016 Q1	–	Sell	-5,114	Closed	-$212K	–	429
2015 Q4	$212K	Buy	+5,114	New	+$209K	﹤0.01%	324

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

Magnetar Financial's MASI Position: Q2 2026 in Review

Magnetar Financial sold out of Masimo (MASI) in Q2 2026, closing a stake of 427,081 shares — an estimated $76M sold.

Magnetar Financial first reported a position in MASI in Q4 2015 and held it in 8 quarters. The position peaked at $76M in Q1 2026. 2 funds tracked by Wall St. Rank hold MASI as of Q2 2026.

Magnetar Financial reported no remaining Masimo position as of Q2 2026 after selling out during the quarter.
Magnetar Financial sold 427,081 Masimo shares in Q2 2026, an estimated $76M.
Magnetar Financial first reported a position in Masimo in Q4 2015 and held it in 8 quarters.
Magnetar Financial's Masimo position peaked at $76M in Q1 2026.
2 funds tracked by Wall St. Rank held Masimo as of Q2 2026.

Based on Magnetar Financial's 13F filing for Q2 2026, filed 14 Aug 2026.