Alliance Capital, an investment research and management company, is taking 12,492 sf on the top floor of the 19-story, six-year-old Prominence I. In addition, Houlihan Lokey Howard Zukin has renewed its 8,842-sf lease and expanded its quarters by 4,564 sf for a total 13,406 sf on the ninth floor.

An Equity representative declined to disclose the length and value of the leases. However, area brokers familiar with the property and the Buckhead submarket tell GlobeSt.com the leases are each probably for 10 years at an effective rate of $28 per sf. That would make the Alliance Capital lease valued at an estimated $3.5 million and the Houlihan Lokey lease at an estimated $3.75 million. The average asking base rent at the 3475 Piedmont Rd. building near the Marta Buckhead station approximately $29 per sf, according to Equity Office.

Alliance Capital was represented by John Ferguson, Lori Wagoner and Matthew Saker of CB Richard Ellis Inc. Tim Farley of Carter & Associates in Atlanta and Jeff Mintz of Travers Realty negotiated for Houlihan Lokey.