X0202 SCHEDULE 13D/A 0001422849 XXXXXXXX LIVE 4 Common Shares 07/29/2026 false 0000028823 253651202 Diebold Nixdorf, Incorporated

350 Orchard Avenue NE North Canton OH 44720-2556

Timothy J. Moon (213) 615-0050 Capital World Investors 333 South Hope Street, 55th Floor Los Angleles CA 90071 0001422849 N Capital World Investors OO N DE 11844145 11844145 11844145 N 34.9 IA The calculation of the percentage of the class beneficially owned by the reporting person is based on 33,946,588 Common Shares (as defined in Item 1 below) outstanding as of July 21, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q, filed with the SEC on July 29, 2026. Common Shares Diebold Nixdorf, Incorporated 350 Orchard Avenue NE North Canton OH 44720-2556 This Amendment No. 4 ("Amendment No. 4") amends and supplements the Schedule 13D filed on August 21, 2023, as amended by Amendment No. 1 thereto filed on October 24, 2023, Amendment No. 2 thereto filed on March 11, 2024 and Amendment No. 3 thereto filed on February 17, 2026 (as amended, the "Schedule 13D") on behalf of Capital World Investors ("CWI" or the "Reporting Person"), a division of Capital Research and Management Company ("CRMC"), a Delaware corporation, as well as its investment management subsidiaries and affiliates Capital Bank and Trust Company, Capital International, Inc., Capital International Limited, Capital International Sarl, Capital International K.K., Capital Group Private Client Services, Inc., and Capital Group Investment Management Private Limited (together with CMRC, the "investment management entities"), relating to the common shares, $0.01 value per share (the "Common Shares"), of Diebold Nixdorf, Incorporated, a Delaware corporation (the "Issuer"). Each Item below amend and supplements the information disclosed under the corresponding Item of the Schedule 13D unless otherwise noted. Except as specifically provided herein, this Amendment No. 4 does not modify any of the information previously reported in the Schedule 13D. Capitalized terms used but not defined in this Amendment No.4 shall have the same meanings herein as are ascribed to such terms in the Schedule 13D. This Amendment No. 4 is being filed to reflect the change in percentage of beneficial ownership held by the Reporting Person as a result of the change in the outstanding Common Shares. The information contained in Item 5(a) of the Schedule 13D is hereby amended and supplemented as follows: The aggregate number of Common Shares to which this Schedule 13D relates is 11,844,145 Common Shares held as of the close of business on July 29, 2026, which represents 34.9% of the Issuer's outstanding Common Shares. The foregoing percentage is calculated based on 33,946,588 Common Shares outstanding as of July 21, 2026, as reported in the Issuer's Quarterly Report on Form 10-Q, filed with the SEC on July 29, 2026. Capital World Investors /s/ Timothy J. Moon 07/31/2026