In a major shakeup of its executive suite, Freddie Mac’s chief executive will step down next year while three members of the GSE’s board of directors are also headed for the exits, the Federal Housing Finance Agency announced this week.Freddie CEO Charles Haldeman Jr. informed the board of his desire “to step down sometime in the coming year,” according to the FHFA announcement. Freddie did not comment on Haldeman’s resignation, nor did it make the announcement itself, referring to the Finance Agency’s official press release in its Securities and Exchange Commission 8K filing this week.