...and fortunately there isn't one in philosophy. The closest cousin is probably the Schock Prize, begun in 1993 and awarded every 2 or 3 years. Past recipients are Quine, Dummett, Dana Scott, Rawls, Kripke, Solomon Feferman, Jaakko Hintikka, Thomas Nagel and, in 2011, Hilary Putnam. The Schock Prize favors formal work, as the list of recipients would suggest, but not exclusively so. So who should be next in line? Kit Fine? Timothy Williamson? John Searle? Tyler Burge? Submit your nominations and your reasons; no doubt the Prize Committee will pay careful attention.