Table of Contents 25 Reference Number per Item 601 of Regulation S- K Description of Exhibits Exhibit Number in this Form 10-K The IBM 1997 Long-Term Performance Plan, a compensatory plan, contained in Registration Statement No. 333-31305 on Form S-8, as such amended plan was filed as Exhibit 10.4 to Form 10-Q for the quarter ended September 30, 2007, is hereby incorporated by reference.* Forms of LTPP equity award agreements for (i) stock options, restricted stock, restricted stock units, cash-settled restricted stock units, SARS and (ii) retention restricted stock unit awards. Such equity award agreement forms and the related terms and conditions document, effective June 9, 2014, were filed under Exhibit 10.1 as Exhibit 10.2 to Form 10-Q for the quarter ended March 31, 2014, are hereby incorporated by reference.* Form of LTPP equity award agreement for performance share units was filed as Exhibit 10.1 to Form 10-Q for the quarter ended March 31, 2015, and is hereby incorporated by reference.* Terms and Conditions of LTPP equity award agreements was filed as Exhibit 10.1 to Form 10-Q for the quarter ended June 30, 2016, and is hereby incorporated by reference.* Form of LTPP equity award agreement for performance share units and Terms and Conditions of LTPP Equity Awards, effective June 1, 2018, in connection with the foregoing award agreements, filed as Exhibit 10.1 to Form 10-Q for the quarter ended March 31, 2018, is hereby incorporated by reference.* Forms of LTPP equity award agreements for (i) stock options, restricted stock, restricted stock units, cash-settled restricted stock units, SARS, (ii) performance share units and (iii) retention restricted stock unit awards as well as the Terms and Conditions of LTPP Equity Awards, effective August 15, 2018, in connection with the foregoing award agreements, filed as Exhibit 10.1 to Form 10-Q for the quarter ended June 30, 2018, are hereby incorporated by reference.* Forms of equity award agreements for (i) stock options, restricted stock, restricted stock units, cash-settled restricted stock units, SARS, (ii) performance share units and (iii) retention restricted stock unit awards as well as the Terms and Conditions of LTPP Equity Awards, effective October 1, 2018, in connection with the foregoing award agreements, filed as Exhibit 10.1 to Form 10-Q for the quarter ended September 30, 2018 are hereby incorporated by reference.* Terms and Conditions of LTPP equity award agreements was filed as Exhibit 10.2 to Form 10-Q for the quarter ended March 31, 2019, and is hereby incorporated by reference.* Forms of equity award agreements for stock options, restricted stock, restricted stock units, cash-settled restricted stock units and SARS, as well as the Terms and Conditions of LTPP Equity Awards, effective July 15, 2019, in connection with the foregoing award agreements, filed as Exhibit 10.1 to Form 10-Q for the quarter ended June 30, 2019, are hereby incorporated by reference.*