I'm not sure that counts as a "stake". He did found the company so I'm sure he still has connections there.

He didn't found OpenAI-the-company which was owned by the OpenAI-the-501(c)3-charity & which has sold off 'capped returns' parts of it, he co-founded the charity, and he left the OpenAI charity a long time ago after having stepped back a lot before that as well. There has been no reporting about him buying a stake in the company the charity owns, and it seems a little unlikely they would want him investing either. So Elon Musk's travails would appear to be largely unrelated to anything going on at either OpenAI-the-company or its parent OpenAI-the-charity.

Very clever use of the word travail. Was the irony intentional, gwern? (See the tail end of the definitions ;)

travail noun

tra·vail tr-vāl tra-vāl

1a: work especially of a painful or laborious nature : TOIL

1b: a physical or mental exertion or piece of work : TASK, EFFORT

1c: AGONY, TORMENT

2a: LABOR, CHILDBIRTH

(Less than intentional, more than accidental. I know the multiple meanings, so it came easily to mind by priming. That sort of unintentional wordplay is a bit of a bad habit, really, when it leads you to use obsolete vocab - the other day someone was asking me if I had made a typo for 'way' when I wrote 'X is in some wise deficient'. I didn't, but it's not like I was trying to be clear either.)