Okay, I just looked at a different section of Computershare. I had forgotten that I elected to "withhold enough shares to pay for taxes" when my shares vest. At each vesting of shares, I'm able to see the [shares delivered] x [FMV], see where they calculated what I owed in taxes, and see how many shares they withheld to cover that amount.
So, for example, at one point ~25 shares vested, and they withheld 10 shares to cover taxes.
I'm not sure in what way, if any, this affects the answer, but at least I know where to find the stock's FMV at the time of vesting.
