Premarket Roundup: OmniVision, Sealy

Among the premarket stories for Friday, May 28, from AP Financial News:

NEW YORK (AP) — OmniVision Technologies Inc. shares rose in premarket trading Friday after the chip maker reported a smaller quarterly loss than analysts anticipated and offered a better-than-expected forecast.

NEW YORK (AP) — Sealy Corp.'s stock is now fairly valued and its recapitalization has been fully accounted for, an analyst said Friday as he lifted his rating on the mattress maker.

NEW YORK (AP) — An FBR analyst on Friday raised her rating on shares of grocery store chain Winn-Dixie Stores Inc., saying the stock is cheap given that the company has been reporting stable business trends.

MOORESVILLE, N.C. (AP) — Shareholders of Lowe's Cos. are set to gather to re-elect four directors and listen to executives review the home improvement chain's plans to fend off competition amid a grueling housing market.