13D Management LLC

SEC CIK: 0001600133
Latest filing: Aug 14, 2026

SEC filings (opens in a new tab)

MASI holding history

Masimo Corp in every 13F filed by 13D Management LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.

MASI overview All 13F holders of MASI Full Q2 2026 holdings

Shares (Q1 2024): 0; Sold out in Q1 2024
Value: $0
% of portfolio: 0.0%
Quarters held: 3; Since Q2 2023

Holdings of MASI by 13D Management LLC, by quarter
Quarter	Shares	Value	% of portfolio	Share change	Action	All holders
Q1 2024	0	$0	0.0%	−44,095−100.0%	Sold out	Holders
Q4 2023	44,095	$5.17M	3.0%	+21,982+99.4%	Added	Holders
Q3 2023	22,113	$1.94M	1.2%	−5,487−19.9%	Reduced	Holders
Q2 2023	27,600	$4.54M	2.5%	+27,600	New	Holders