Fannie Mae


said Thursday that former CEO Daniel Mudd will resign from the board of directors immediately.

Fannie did not provide a reason for Mudd's departure. The move comes just weeks after the government placed Fannie and its sister company,

Freddie Mac


into conservatorship and replaced top executives.

The mortgage-finance giants had been on the brink of collapse, with plunging share prices and weak capital levels. In after-hours trading on Friday, Fannie shares were up 2.6% at $1.60, and Freddie was down 1.7% at $1.77.