I'm surprised Qualcomm and Broadcomm are not interested in buying ARM.
A curiosity: Sophie Wilson is currently a director at the technology conglomerate Broadcom Inc.
As regards, Sophie Wilson, it gets complicated.
They did (arguably with others) invent/start/create the arm processor chip. In her case, especially the original instruction set.
But, they were working for the 'original' arm company, that had produced the BBC microcomputer in the UK.
As later arm cores began to be created, they (arm) invented/created the 'Thumb' instruction set(s). But, ironically, Sophie Wilson, (reportedly), actually disagreed with the 'Thumb' instruction set concept, when it was first proposed.
So, historically, they carried on and decided to go with the 'Thumb' instruction set incarnations. Also, at some point, Sophie Wilson, left the company.
I think that was BEFORE, the arm company existed, as we know it.
So, the arm core licencing company, didn't actual have Sophie Wilson, working for it, ever, as such.
If I remember my arm history, correctly. (I could look it up, but hope I don't need to).
tl;dr
Sophie Wilson, never actually worked for 'arm', as we think of the modern 'arm' companies. They worked for the original one (Acorn computers, or whatever it was called, a long time ago, originally).
Best to seek out and read the history, if you want to know more.
They did work on the original, ancient, first arm chips (and maybe a bit later than that).
But not the later, licenced arm cores, we think of these days, when someone mentions 'arm'.
I.e. They were different companies, one followed on from the other, but not all employees, stayed with the new company.
So, Sophie Wilson, was one of the people that left, and didn't actually join the new company (a quick lookup, they left in 1990, when the new company was split off (Arm Ltd), but did do some consultancy work, with them. Source:
https://en.wikipedia.org/wiki/Sophie_Wilson ). A very long time ago, before most people had even heard of 'arm' processor chips, unless they were involved with the early UK computer scene, especially related to educational computers (Archimedes).
https://en.wikipedia.org/wiki/Acorn_Archimedes