Five of them. Quincy, Eddie Johnson, Dimi Konstantopoulos, Tom Heaton and Staurt Taylor have all returned to their parent clubs.
The 6th is Michael Chopra. When he completed his loan move to Ninian Park earlier in the year it was said a deal has been agreed for a permanent move in the summer.
So we are waiting for full confirmation of that signing with Sunderland's official website saying that he will become a full time Cardiff player this summer.