Looking at past ISRG financials, they don't need anymore cash, capital, etc. So I'm guessing management would distribute any unneeded funds, buyback shares, and/or hold onto the cash... Whatever creates the most return/value to shareholders. They could just wait until the opportune moment to buyback shares at a market fall, stock decline, etc. Unless that's too hard to do.
My take, for ISRG and every other business, is why not sit on a hoard of cash until something develops that can't be questioned as being non-beneficial? Buying back shares of any company at 100% intrinsic value, as stated in earlier comments, is no problem. But buying back ISRG shares at $430? Their EPS is $15 and is going to drop for 2014.
The only rebuttal would be if $430 is their intrinsic value, ok that's fine. But I will add they deleted the shares they bought instead of adding to Treasury stock which is another wtf.