Rainmaker Chart of Due dates for filings for Companies with a December 31st year end. 1st quarter financial numbers for the quarter ended March 31st are due on May 15th or May 20th if you file for a 5 day extension. Second quarter report for quarter ended June 30th is due by August 15th or August 20th if you file for a 5 day extension. Third quarter numbers for quarter ended September 30th are due by November 15th or November 20th if you file for a 5 day extension. Annual report for year ended December 31st are due by March 31st or April 15th if you file for a 15 day extension. Note: Annual reports can file for 15 day extension, quarterly reports can only file for a 5 day extension.