> Under the terms of the deal, the buyers' consortium, which also includes Microsoft, will pay $13.65 a share in cash.
So the stock probably won't sell above that number, but won't be far off from it until the deal closes. Since it's a cash deal, after the deal closes you'll probably be compensated with cash (your shares would disappear from your brokerage account and you'd gain the equivalent cash value).
(Assuming I had shares, which I don't.)
This is the same thing that would happen in an all-stock transaction: let's say you own shares in Ford, and General Motors announces a buyout of Ford. The end-result is that you now own some percentage of GM, since Ford is now part of GM. Poof: your Ford shares convert to some equivalent number of GM shares. Do you cease to own Ford? Well, kind of, since Ford just ceased to exist. So there's nothing to "hold on to" in the sense you're implying.