Given the disaster and nearly unprecedented nature of these events I doubt anyone would bat an eye at a CEO taking the decisive action to do what needs to be done to survive (and fix it later). For many the past few days have been the startup equivalent of "fog of war".

As others have noted it's not embezzlement/commingling and given the scenario "Wire out from SVB corp account to personal, document exact amount, and wire back to corp $NEWBANK a week/days later, document again" would hardly cause any heartburn now or down the road. Many would see it as responsible, proactive, and heroic.

Depending on the amount the only issue would likely come from your personal bank - I know of people with ~$10m at SVB and I have to imagine all of sudden wiring those kinds of funds to a personal account with an average daily balance that's a fraction of that would raise some alarms on the personal account - or maybe not as I can imagine the big big banks (BoA, etc) probably saw a lot of this on Thursday...