 Shares of video gaming software company Unity Software Inc. U, 3.54 rallied 11.0 in premarket trading, while Applovin Corp.s stock APP, 10.09 tumbled 10.0, after Applovin said it submitted and unsolicited bid to buy Unity in an all-stock deal with an enterprise value of 20 billion. Under terms of the deal, marketing software company Applovin said it will exchange 1.152 of its Class A shares and 0.314 of its Class C shares for each Unity share outstanding. 