I have RSUs (restricted stock units) from a former employer that are due to expire in the future. This company is privately held and there is currently no market for the RSUs; the promise was that if the company went public, the RSUs would be converted to common stock. When the RSUs vested, I needed to pay ordinary income tax on them based on the fair market value. If they expire, is there a way for me to recoup what I paid in taxes for the RSUs or otherwise declare a loss on them?