My company was acquired almost a year ago. In the acquisition, most employees received RSU grants which vested on a 1 year cliff.
These RSUs are managed through Etrade. My options for tax purposes are "Withhold shares", "Sell to cover", "Cash Transfer" and "Same day sale".
My concern is this -- some back-of-the-envelope math says that, assuming most employees do a same-day-sale (there is no good tax reason not to), the total volume of shares being sold on the acquisition anniversary will be 1-2x the average daily trading volume of the stock.
Should I be concerned that the large number of shares being released on that day will drop the share price (at least temporarily) enough to hurt the price my grant will fetch? I don't know what kind of protections Etrade has against the market being too shallow to sell shares at a reasonable price.
I could do a "Cash Transfer" if absolutely necessary, but it would be difficult to get enough liquid cash transferred in time for this option.