Workday is trading at $176.49, down 5.19%, in pre-market; no confirmed catalyst for the decline has surfaced. - Its September 29 filing disclosed a workforce reduction of about 2.5% and expected $65 million to $80 million in restructuring charges, with a lower GAAP operating-margin outlook. The filing did not explicitly link these details to the October 5 decline. - No separate October 5 catalyst surfaced in the search. Broad indices were only modestly lower, which does not clearly account for the drop.