Quarterly report
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☑ ☐ ( Mark One ) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - Q QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended : October 2 , 2021 or TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number : 1-14315 CORNERSTONE ™ BUILDING BRANDS Cornerstone Building Brands , Inc. ( Exact name of registrant as specified in its charter ) - Delaware ( State or other jurisdiction of incorporation or organization ) 5020 Weston Parkway Suite 400 Cary NC ( Address of principal executive offices ) ( 866 ) 419-0042 76-0127701 ( I.R.S. Employer Identification No. ) 27513 ( Zip Code ) ( Registrant's telephone number , including area code ) Indicate by check mark whether the registrant ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes ý No " Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . ý Yes " No Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of “ large accelerated filer , ” “ accelerated filer , ” “ smaller reporting company , " and " emerging growth company ” in Rule 12b - 2 of the Exchange Act . Large accelerated filer Non - accelerated filer ☐ " ( Do not check if a smaller reporting company ) Accelerated filer Smaller reporting company Emerging growth company > ☐ ☐