Stuart Rothenberg, formerly the head of real estate investment at Goldman Sachs, and wife Pamela Rothenberg purchased a waterfront mansion in the Bay Point neighborhood of Miami for $11.3 million.
John Walbridge, the head of international security firm Overseas Security and Strategic Information, and wife Cassandra Walbridge sold the 7,169-square-foot home at 4731 Lake Road. The sellers were represented by Betsy Madge and Marissa Kartheiser of Compass while the buyers worked with Eddy Martinez and…