 Shares of Lamb Weston Holdings Inc. LW, 0.26 shot up 6.3 toward a three-year high in premarket trading Thursday, after the frozen-potato products seller reported a big fiscal second-quarter earnings beat has higher pricing to counter cost inflation offset a decline in volume. Net income for the quarter to Nov. 27 more than tripled to 103.1 million, or 71 cents a share, from 32.5 million, or 22 cents a share, in the year-ago period. 