The Vanguard Group, one of Masimo's largest shareholders, has backed both Politan nominees, two sources said.
The company, which is currently valued at $8.5 billion, is expected to make preliminary voting results public later on Monday.
A representative for Politan declined to comment, and a representative for Masimo was not immediately available for comment.
The hedge fund, founded by Koffey, received backing from proxy advisory firms Institutional Shareholders Services and Glass Lewis two weeks ago when both urged shareholders to elect the Politan nominees.
In the end, Masimo reversed course and dropped the requirements after Politan sued in Delaware court.
Persons:
Quentin Koffey, Michelle Brennan, Masimo, Koffey, Glass Lewis, Politan, Svea Herbst, Bayliss, Leslie Adler
Organizations:
YORK, Masimo, Politan Capital Management, Vanguard Group, Vanguard, Sound United, Shareholders Services, ISS, Svea, Thomson
Locations:
Delaware