ARROWSTREET CAPITAL, LIMITED PARTNERSHIP

Position in MASI — Masimo Corp

CIK 1164508 BOSTON, MA

Position in MASI

as of Mar 31, 2026 · filed May 14, 2026 Compact

Position Value

$30,698,227

+$11,863,834 QoQ

Shares Held

172,588

+50.8% QoQ

Ownership

0.330%

of shares outstanding

% of Portfolio

0.02%

of 13F equity value

Holder Rank

#57

of 445 holders

Holding Since

Mar 2020

13 quarters on record

Voting authority Sole 100.ToString("F0")% Shared 0.ToString("F0")% None 0.ToString("F0")%

Healthcare · as of Mar 31, 2026

ARROWSTREET CAPITAL, LIMITED PARTNERSHIP holds $3,649,670,055 across 35 Medical Devices names. MASI ranks #14 (0.8% of the industry book) .

#	Ticker	Company	Shares	Value (USD)
1	BSX	Boston Scientific Corp	13,891,668	$871,702,167
2	ABT	Abbott Laboratories	5,522,222	$566,966,532
3	SYK	Stryker Corp	1,555,638	$511,167,090
4	MDT	Medtronic plc	4,659,425	$403,739,176
5	PODD	Insulet Corp	1,229,928	$258,088,091
6	DXCM	Dexcom Inc	2,545,103	$159,832,468
7	EW	Edwards Lifesciences Corp	1,890,859	$151,419,988
8	PEN	Penumbra Inc	400,160	$131,400,539

13 filing rows on record

Report Date	Value (USD)	Shares	Change	Type	Discretion	Filed
2026-03-31	$30,698,227	172,588	+50.8%	Shares	Defined	2026-05-14
2023-06-30	$18,834,393	114,460	+4.7%	Shares	Defined	2023-08-14
2023-03-31	$20,172,251	109,311	+26.8%	Shares	Defined	2023-05-15
2022-12-31	$12,757,580	86,229	+0.4%	Shares	Defined	2023-02-14
2022-09-30	$12,125,926	85,902	-28.4%	Shares	Defined	2022-11-14
2022-06-30	$15,684,973	120,035	-47.6%	Shares	Defined	2022-08-15
2022-03-31	$33,348,744	229,138	+60.8%	Shares	Defined	2022-05-13
2021-12-31	$41,723,199	142,507	-21.2%	Shares	Defined	2022-02-14
2021-09-30	$48,938,141	180,777	+4.8%	Shares	Defined	2021-11-12
2021-06-30	$41,817,048	172,477	+48.3%	Shares	Defined	2021-08-13
2021-03-31	$26,715,199	116,325	+91.5%	Shares	Defined	2021-05-14
2020-12-31	$16,301,401	60,740	+688.8%	Shares	Defined	2021-02-12
2020-03-31	$1,363,824	7,700	—	Shares	Defined	2020-05-15
No filing history on record for this holder in this stock.