Riverbed Technology, the San Francisco-based network infrastructure maker, is relying on Sard Verbinnen & Co as it fends off a $3.2B hostile bid from hedge fund Elliott Management Corp. New York-based Elliott, which works with Sloane & Company for PR, went public with a letter to Riverbed on Jan. 14, urging one of two paths: explore Elliott’s offer or any other interest, or publicly reject the takeover offer and any others.