Except for a 10BTC test transaction he spent to Hal in 2009, and maybe one or two coinbases that nobody noticed or tracked down to him, they are all still sitting there untouched in his mined coinbase txOuts. I have a list of over 5000 of his coinbase addresses, and they have not budged. He hasn't consolidated coins in one wallet, he hasn't tumbled coins, he hasn't bought anything from overstock.com or anywhere else.
We're talking here about someone who could cause deep unrest, perhaps bordering on panic, just by generating a new address and sending 50BTC from one of his old addresses to it. I can name dozens of places that would light up like Christmas trees if even one of his known addresses moved; hell, my own computer would light up like a Catharine wheel. I'd have a text message within fifteen seconds of a transaction spending one of those addresses hitting the Bitcoin network, and that message hasn't been sent even once in the months since I set up the script.
But are you sure we know ALL of Satoshi's addresses?
If Satoshi was still mining in 2011 like any other 500+ people mining at that time, how would we know?