RE:RE:GSK offer at $14.75 cash USDThat's really a decision only you can make.
If it was my choice , I would tend to keep the shares and let it all unfold.It's a clean offer , by which I mean it's all cash and by a company that definitely has the money. and therefore the offer is not likely to disappear ( I don't like being given shares as part of a deal ).
On the other hand , if you have some other stock you want to buy ...... Bellus is not likely to go up a lot more.