Facts, cleared of speculation, indicate that under the pseudonym of Satoshi Nakamoto was Len Sassaman, a cyberpunk, American used to using British En, a COSIC doctoral student who worked with Hal Finney, collaborated with Adam Back and died two months after satoshi left bitcointalk. May he rest in peace.

https://news.bitcoin.com/the-many-facts-pointing-to-cypherpunk-len-sassaman-being-satoshi-nakamoto/