I have options on Carta from a prior employer that are going to expire in a few months because there's no buyer for them. If Carta is looking for some shares to trade without the owner's consent I wholeheartedly volunteer.
You probably know this, but commonly you can exercise options and keep the underlying shares past the original option expiry date. (Of course, you need the cash—and confidence in the business—to do this!)
The problem is that after paying the strike price to exercise and the subsequent taxes I'd be underwater based on their current FMV so it doesn't make sense to exercise them. Plus I have very little confidence left in the business.