United Air Lines parent UAL ( UAUA) has told regulators it will need a little more time before completing and filing its annual report. The company, in a filing with the Securities and Exchange Commission, attributed the delay to the accounting work that followed its emergence from bankruptcy last month. UAL left Chapter 11 in February after more than three years of operating under court protection. "The timing of the bankruptcy exit created an additional burden of preparing for fresh start accounting at the same time we were preparing our Form 10-K for the year ended December 31, 2005 along with supporting Sarbanes-Oxley ("SOX") work, including completion of our SOX 404 review," UAL's SEC filing read. By submitting the notice to the SEC, UAL will have up to 15 more days to file the annual report. The due date was March 16. UAL doesn't expect any material effect on its consolidated financial statements as a result of the delay. The company reported a loss of about $21.2 billion for the year ended Dec. 31, compared with a loss of $1.7 billion for 2004. Shares of UAL lost 30 cents to $39.27 Thursday.