With U.S. stock futures trading mixed this morning on Friday, some of the stocks that may grab investor focus today are as follows:Heritage Financial Corp (NASDAQ: HFWA) announced plans to acquire Olympic Bancorp in an all-stock $176.6 million deal. Heritage Financial shares fell 0.2$24.60 on Thursday.Wall Street expects Inventiva S.A. (NASDAQ: IVA) to report a loss at 41 cents per share on revenue of $5.31 million for the first half, before the opening bell today, according to data from Benzi ...