Black Forest Ventures has landed its first tenant at 5050 Westheimer, the opulently appointed former headquarters of Stanford Financial Group.

Keller Williams Metropolitan Realty will move more than 300 real estate agents to the building by June. It will occupy the second floor or 19,000 square feet. Its offices are at 550 Post Oak Blvd.

The Woodlands-based Black Forest Ventures had hoped to lease the entire 71,000-square-foot building to a single tenant and has been marketing it for more than a year, Haydar Kustu told the Chronicle during a tour of the building last year.

Situated directly across from the Galleria, the building contains four stories plus a lower level concourse. The former executive suite of R. Allen Stanford, who is on trial for allegedly running a $7 billion fraud, is on the first floor along with a private dining room and conference facility.

Kyle Drake and Matt Moake of Drake Realty Group, a member of KW Commercial, represented Keller Williams Realty Metropolitan with Black Forest Ventures.