The time lag from final approval to closing varies from deal to deal. Since there is no outside financing involved, and Berkshire has the cash ready to go, I would not be surprised if the deal closed within 48 hours of getting approval from China (and maybe the same day). In my experience transmitting shares from broker to charity take several days (often a week or two), so I would donate the shares now rather than waiting for final approval from China (unless you can make arrangements ahead of time that will let you transfer the shares very quickly). Most charities have a policy of selling donated stock as soon as they receive it. So if you donate your PCP now the value of the shares (and your tax deduction) will be about $232/sh rather than the deal price of $235. I'd suggest talking to your broker and/or the charity to get their thoughts on how to best accomplish your goals. Congrats on your long-term gain!