After a regulatory filing detailed other interested bidders for TubeMogul (TUBE), SunTrust analyst Matthew Thornton says he does not know whether a higher bid will surface. The stock is trading above the $14 price offered by Adobe (ADBE) on the potential that Party A and/or Party C, as they are referred to in today's filing, could return with a higher bid, Thornton tells investors in a research note. Party A seemed to indicate $14 was too high while Party C couldn't make a proposal under the prior time constraint, the analyst adds. He has a Hold rating on TubeMogul with a $14 price target.