Premarket Roundup: Gymboree, Goldman Sachs

Among the premarket stories for Tuesday, Sept. 22, from AP Financial News:

NEW YORK (AP) — Market share gains, improved merchandise and top-notch management were among the reasons an analyst gave for upgrading shares of children's clothing retailer Gymboree Corp. on Tuesday. Shares rose in premarket trading.

NEW YORK (AP) — Goldman Sachs Group Inc. is likely to benefit from an improving financial environment, including increased corporate underwriting and mergers and acquisitions activity, an analyst said Tuesday.

NEW YORK (AP) — An analyst upgraded shares of medical device maker American Medical Systems Holdings Inc. Tuesday, saying he is less concerned about competition in the field of treatments for male urinary incontinence.

HARTFORD, Conn. (AP) — A stronger-than-expected recovery is benefiting Martin Marietta Materials Inc., which supplies gravel and sand to road builders, an analyst said Tuesday as she downgraded the company's shares to reflect new risks.