Psygnosis: 1984 - 2012
Sony has just confirmed that it is closing Liverpool Studio, cancelling all current and future studio projects as well. The studio produced the popular Wipeout games, among many, many others (ever hear of a little game called Lemmings?).
The developer was founded in 1984 as Psygnosis, and was acquired by Sony only nine years later.
It appears that Sony is looking into relocating the studio's staff, so (at the very least) this closure shouldn't be a total Wipeout.