I haven't been able to get a clear answer for this so hoping you can help – what are companies' appetites for matching existing stock grants for senior hires? Say someone gets a FAANG or "hot startup" offer, but has $800K worth of stock (mainly due to price appreciation) at their current company vesting in the next year, is a direct match out of the question?
Some companies are willing to match stock grants. We've even seen some companies up-level candidates (to meet the higher compensation band) to nudge them out of their current roles where they've experienced a lot of stock growth. That said, there's still probably a cap to it, it'd be really hard even for a Facebook to get someone away from a multi-million dollar vest as an IC. Also keep in mind that all companies won't value options / ISO / private shares as much as public companies.