 Shares of Shift4 Payments Inc. FOUR, -1.81 were up more than 8 in premarket trading Monday after the maker of payment technology for the hospitality industry swung to a profit and upped its outlook for the full year. The company recorded third-quarter net income of 46.4 million, or 78 cents a share, whereas it posted a net loss of 13.8 million, or 17 cents a share, in the year-before quarter. 