There is still a small window for grad transfers but the portal is now closed. Now is the time to add to the roster and mitigate a few loses. Michigan did not lose any stars, they did lose depth at some important positions like LB, S, and WR.
Michigan's activity in the portal has been very quiet. There are a ton of safeties and wide receivers but we haven't really heard of them reaching out. It could be because this is a new coaching staff and the insiders don't have relationships yet or Michigan is slow playing it.