Table of Contents Reference Number per Item 601 of Regulation S- K Description of Exhibits Exhibit Number in this Form 10-K Amended and Restated $2,500,000,000 Three-Year Credit Agreement dated as of July 19, 2018, among International Business Machines Corporation and IBM Credit LLC, as Borrowers, the Several Lenders from time to time parties to such Agreement, JPMorgan Chase Bank, N.A., as Administrative Agent, BNP Paribas, Citibank, N.A., Royal Bank of Canada and Mizuho Bank, Ltd., as Syndication Agents, and the Documentation Agents named therein, filed as Exhibit 10.2 to Form 8-K dated July 20, 2018, is hereby incorporated by reference. Amended and Restated $10,250,000,000 Five-Year Credit Agreement dated as of July 19, 2018, among International Business Machines Corporation, as the Borrower, the Several Lenders from time to time parties to such Agreement, JPMorgan Chase Bank, N.A., as Administrative Agent, BNP Paribas, Citibank, N.A., and Royal Bank of Canada and Mizuho Bank, Ltd., as Syndication Agents, and the Documentation Agents named therein, filed as Exhibit 10.3 to Form 8-K dated July 20, 2018, is hereby incorporated by reference. Confirmation of Termination Date Extension to $2,500,000,000 Amended and Restated Three-Year Credit Agreement dated as of July 19, 2018, among International Business Machines Corporation and IBM Credit LLC, as Borrowers, the several lenders from time to time parties to such Agreement, JPMorgan Chase Bank, N.A., as Administrative Agent, BNP Paribas, Citibank, N.A., Royal Bank of Canada and Mizuho Bank, Ltd., as Syndication Agents, and the Documentation Agents named therein, filed as Exhibit 10.2 to Form 8-K dated July 19, 2019, is hereby incorporated by reference. Confirmation of Termination Date Extension to $10,250,000,000 Amended and Restated Five-Year Credit Agreement dated as of July 19, 2018, among International Business Machines Corporation, as the Borrower, the several lenders from time to time parties to such Agreement, JPMorgan Chase Bank, N.A., as Administrative Agent, BNP Paribas, Citibank, N.A., and Royal Bank of Canada and Mizuho Bank, Ltd., as Syndication Agents, and the Documentation Agents named therein, filed as Exhibit 10.3 to Form 8-K dated July 19, 2019, is hereby incorporated by reference. First Amendment to the $2,500,000,000 Amended and Restated Three-Year Credit Agreement dated as of July 2, 2020, among International Business Machines Corporation and IBM Credit LLC, as Borrowers, the several lenders from time to time parties to such agreement, JPMorgan Chase Bank, N.A., as Administrative Agent, BNP Paribas, Citibank, N.A., Royal Bank of Canada and Mizuho Bank, Ltd., as Syndication Agents, and the Documentation Agents named therein, filed as Exhibit 10.2 to Form 8-K dated July 2, 2020, is hereby incorporated by reference. First Amendment to the $10,250,000,000 Amended and Restated Five-Year Credit Agreement dated as of July 2, 2020, among International Business Machines Corporation, as the Borrower, the several lenders from time to time parties to such Agreement, JPMorgan Chase Bank, N.A., as Administrative Agent, BNP Paribas, Citibank, N.A., and Royal Bank of Canada and Mizuho Bank, Ltd., as Syndication Agents, and the Documentation Agents named therein, filed as Exhibit 10.3 to Form 8-K dated July 2, 2020, is hereby incorporated by reference. (13) Annual Report to Security Holders ** 13 (21) Subsidiaries of the registrant 21 24