 Shares of Lumentum Holdings Inc. LITE, 2.37 jumped 1.7 in premarket trading Wednesday, after the optical networking company swung to a fiscal fourth-quarter profit and reported revenue that rose above expectations, while providing an upbeat outlook. Net income for the quarter to July 3 was 21.5 million, or 28 cents a share, after a loss of 4.6 million, or 6 cents a share, in the year-ago period. 