A multifamily investor looked like it was changing its stripes when it bought the 1001 Brickell Bay office tower in Miami for $157 million in South Florida’s second biggest office sale of the year. But maybe not.

The transaction remained off the radar since closing three months ago with Aimco buying majority control of the owner of the building on Biscayne Bay. The purchase was reported in the company’s earnings report, and state corporate records now list Aimco executives as heads of tower-owning company.