Executive Change · Bylaw Amendment

Title of each class Capital stock, par value $.20 per share Trading symbol IBM Common Stock     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: December 12, 2023 (Date of earliest event reported)       INTERNATIONAL BUSINESS MACHINES CORPORATION (Exact name of registrant as specified in its charter)       New York   1-2360   13-0871985 (State of Incorporation)   (Commission File Number)   (IRS employer Identification No.)   One New Orchard Road     Armonk , New York   10504 (Address of principal executive offices)   (Zip Code)   914 - 499-1900 (Registrant’s telephone number)     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:   ¨ 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 Capital stock, par value $.20 per share   IBM   New York Stock Exchange         NYSE Chicago 1.125% Notes due 2024   IBM 24A   New York Stock Exchange 2.875% Notes due 2025   IBM 25A   New York Stock Exchange 0.950% Notes due 2025   IBM 25B   New York Stock Exchange 0.875% Notes due 2025   IBM 25C   New York Stock Exchange 0.300% Notes due 2026   IBM 26B   New York Stock Exchange 1.250% Notes due 2027   IBM 27B   New York Stock Exchange 3.375% Notes due 2027   IBM 27F   New York Stock Exchange 0.300% Notes due 2028   IBM 28B   New York Stock Exchange 1.750% Notes due 2028   IBM 28A   New York Stock Exchange 1.500% Notes due 2029   IBM 29   New York Stock Exchange 0.875% Notes due 2030   IBM 30A   New York Stock Exchange 1.750% Notes due 2031   IBM 31   New York Stock Exchange 3.625% Notes due 2031   IBM 31B   New York Stock Exchange 0.650% Notes due 2032   IBM 32A   New York Stock Exchange 1.250% Notes due 2034   IBM 34   New York Stock Exchange 3.750% Notes due 2035   IBM 35   New York Stock Exchange 4.875% Notes due 2038   IBM 38   New York Stock Exchange 1.200% Notes due 2040   IBM 40   New York Stock Exchange 4.000% Notes due 2043   IBM 43   New York Stock Exchange 7.00% Debentures due 2025   IBM 25   New York Stock Exchange 6.22% Debentures due 2027   IBM 27   New York Stock Exchange 6.50% Debentures due 2028   IBM 28   New York Stock Exchange 5.875% Debentures due 2032   IBM 32D   New York Stock Exchange 7.00% Debentures due 2045   IBM 45   New York Stock Exchange 7.125% Debentures due 2096   IBM 96   New York Stock Exchange   Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).   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 5.02(d). Election of Directors.   On December 12, 2023, IBM announced that Marianne C. Brown, the former Chief Operating Officer of Fidelity National Information Services, Inc.’s (FIS) Global Financial Solutions, has been elected to the IBM Board of Directors, effective December 12, 2023. Ms. Brown joined the Directors and Corporate Governance Committee.   IBM’s compensatory and other arrangements for non-management directors are set forth in the company’s Proxy Statement, dated March 6, 2023. The press release is attached as Exhibit 99.1 of this Form 8-K.   Item 5.03(a) Amendment to Bylaws.   In connection with the election of Marianne C. Brown to the IBM Board of Directors, effective December 12, 2023, Article III, Section 2 of IBM’s By-laws was amended to increase the number of directors to fourteen, effective December 12, 2023. Exhibit 3.2 of this Form 8-K contains IBM’s amended By-laws.   Item 9.01. Financial Statements and Exhibits.   (d) Exhibits   The following exhibits are being filed as part of this report:   Exhibit No.   Description of Exhibit 99.1   Press Release, dated December 12, 2023       3.2   The By-laws of IBM, as amended through December 12, 2023       104   Cover Page Interactive Data File (embedded within the Inline XBRL document)   IBM’s web site (www.ibm.com) contains a significant amount of information about IBM, including financial and other information for investors (www.ibm.com/investor/). IBM encourages investors to visit its various web sites from time to time, as information is updated and new information is posted.   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.   Date: December 12, 2023               By: /s/ Frank Sedlarcik     Frank Sedlarcik     Vice President, Assistant General Counsel and Secretary   3