 Shares of 8X8 Inc. EGHT, -0.43 rose 3.3 in premarket trading Wednesday after the business communications services company said it will cut its global workforce by about 7, as part of a restructuring aimed at refocusing its target market and at cutting costs. With about 2,216 employees announced in the California-based companys latest annual report, about 155 employees are likely to be laid off. 