Results of Operations

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549     FORM 8-K     CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported): September 22, 2022     COSTCO WHOLESALE CORPORATION (Exact name of registrant as specified in its charter)       Washington   0-20355   91-1223280 (State or other jurisdiction of incorporation)   (Commission File No.)   (I.R.S. Employer Identification No.) 999 Lake Drive Issaquah , WA 98027 (Address of principal executive offices and zip code) Registrant’s telephone number, including area code: 425 - 313-8100     Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):   ☐ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)   ☐ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)   ☐ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))   ☐ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))   Securities registered pursuant to Section 12(b) of the Act:   Title of each class   Trading Symbol(s)   Name of each exchange on which registered Common Stock, par value $.01 per share   COST   NASDAQ Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (17 CFR §230.405) or Rule 12b-2 of the Securities Exchange Act of 1934 (17 CFR §240.12b-2). Emerging growth company   ☐ If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.  ☐       Item 2.02. Results of Operations and Financial Condition On September 22, 2022, the Company issued a press release containing its operating results for the 16-week fourth quarter and the 52-week fiscal year, ended August 28, 2022. A copy of the press release is included in Item 9.01.   Item 9.01. Financial Statements and Exhibits (d) Exhibits. The following exhibit is included in this report:   99.1.    Press release dated September 22, 2022.  104    Cover page Interactive data file (embedded within the inline XBRL document)     2 SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized, on September 23, 2022.   COSTCO WHOLESALE CORPORATION By:   /s/ Richard A. Galanti   Richard A. Galanti   Executive Vice President and Chief Financial Officer   3