A $180 million offering by aQuantive Inc. counts as one of the bigger Internet-based public offerings since the bubble went flat several years ago.

Lead Pillsbury Winthrop Shaw Pittman attorney Michael Halloran, who represented the underwriters in the deal, said the offering is a sign of a “rational market” in which Internet companies with significant revenue are making real offerings. The Seattle-based digital media and advertising company last year reported revenues of a little more than $300 million.