NEW YORK, July 6 (Reuters) - Goldman Sachs Group Inc (GS.N: Quote, Profile, Research) has not seen its business or clients harmed by the activities of a computer programmer being held in custody for allegedly stealing secret trading codes from the firm, a source familiar with the situation said.

Sergey Aleynikov, 39, was being held in federal custody on Monday, pending the posting of $750,000 bail.

Goldman Sachs declined to comment. (Reporting by Elinor Comlay)