UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 10-Q ý Quarterly Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 For the Quarterly Period Ended March 31, 2019 or ¨ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Commission File Number 1-671 GRAHAM HOLDINGS COMPANY (Exact name of registrant as specified in its charter) Delaware 53-0182885 (State or other jurisdiction of incorporation or organization) (I.R.S. Emp ...

ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 FOR THE FISCAL YEAR ENDED December 31, 2018 Commission file number 1-6714 Graham Holdings Company (Exact name of registrant as specified in its charter) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K Delaware 53-0182885 (State or other jurisdiction of incorporation or organization) (I.R.S. Employer Identification No.) 1300 North 17th Street, Arlington, Virginia 22209 (Address of principal ...