I’ve been sent a donation list here:
The list notes that Johnson may not be 100% GOP. It appears she donated to the Hillary Action fund in 2016, for example.
An article here:
Fidelity's Abigail Johnson maxes out donations to Republican presidential candidate Jeb Bush …
The heiress to a Boston business dynasty has found her match in the would-be heir to an American political one…
Shows her overall donations skew Republican, notably to Romney (also an investor in Ethos), Bush, McConnell and Boehner.
Absent further information, I’m still standing by the claim that Ethos is majority if not totally republican owned.
Thanks @DomainIncite for doing some additional digging.