"Oracle's silence on the matter is true to form, as the company seldom discusses layoffs. This round was communicated to workers on the Friday before a long weekend and on the first day of the month. That timing means that immediate media scrutiny was less likely and that regulatory filings under US States' Worker Adjustment and Retraining Notification (WARN) regulations will remain out of sight for extra days in jurisdictions that report them weekly, or extra weeks in States that publish monthly."
https://www.theregister.co.uk/2017/09/04/oracle_layoffs_solaris_sparc_teams/