X0206 3 2020-09-18 0 0001796022 StepStone Group Inc. STEP 0001585937 Argonaut Private Equity, L.L.C. 6733 S. YALE AVE. TULSA OK 74136 0 0 1 0 0001394221 Argonaut Holdings, L.L.C. 6733 S. YALE AVE. TULSA OK 74136 0 0 1 0 0001821971 Sanford Energy, Inc. 6733 S. YALE AVE. TULSA OK 74136 0 0 1 0 0001163432 KAISER GEORGE B C/O FREDERIC DORWART, LAWYERS 124 EAST FOURTH STREET TULSA OK 74103 0 0 1 0 0001610279 Mitchell Steven R C/O STEPSTONE GROUP INC. 450 LEXINGTON AVENUE, 31ST FLOOR NEW YORK NY 10017 1 0 1 0 0001728668 Waldo Robert C/O STEPSTONE GROUP INC. 450 LEXINGTON AVENUE, 31ST FLOOR NEW YORK NY 10017 1 0 1 0 Class B Common Stock 10263186 D Class B Common Stock 3830328 D Class B Units Class A Common Stock 10263186 D Class B Units Class A Common Stock 3830328 D In the reorganization (the "Reorganization") of StepStone Group LP (the "Partnership") in connection with the closing of the initial public offering ("IPO"), shares of Class B Common Stock of the Issuer, par value $0.001 per share, were issued without additional consideration in exchange for voting interests in the general partner of the Partnership. The Class B Common Stock does not carry economic value beyond the right to receive the par value of such stock upon liquidation, dissolution, winding up or an exchange of those shares. However, the Class B Common Stock entitles its holder to five votes per share on every matter submitted to the Issuer's stockholders for a vote until the occurrence of a sunset, as described in the Issuer's Amended and Restated Certificate of Incorporation. These securities are held of record by Argonaut Holdings, LLC. Argonaut Holdings, LLC is managed by Argonaut Private Equity, L.L.C. Steven R. Mitchell has a derivative interest in Argonaut Private Equity, L.L.C. Robert A. Waldo is a manager and Vice President of Argonaut Private Equity, L.L.C. and has a derivative interest therein. George B. Kaiser is the sole member of Argonaut Private Equity, L.L.C. Each of Steven R. Mitchell, Robert A. Waldo and George B. Kaiser disclaims beneficial ownership of the securities reported herein for purposes of Rule 16a-1(a) under the Securities and Exchange Act of 1934, as amended (the "Exchange Act"), except to the extent of his pecuniary interest therein, if any. These securities are held of record by Sanford Energy Inc. Argonaut Private Equity, L.L.C. holds a minority interest in Sanford Energy Inc. and Robert A. Waldo serves as an advisor to Sanford Energy Inc. Each of Steven R. Mitchell, Robert A. Waldo and George B. Kaiser disclaims beneficial ownership of the securities reported herein for purposes of Rule 16a-1(a) under the Exchange Act, except to the extent of his pecuniary interest therein, if any. In the Reorganization, Class A Units in the Partnership held prior to the IPO were converted into Class B Units. Pursuant to an Exchange Agreement entered into in connection with the Reorganization, the Class B Units of the Partnership are exchangeable, on a one-for-one basis, for shares of Class A Common Stock. Upon exchange of a Class B Unit, the corresponding share of Class B Common Stock will be automatically redeemed and cancelled. Argonaut Private Equity, L.L.C.; By /s/ Frederic Dorwart, Manager 2020-09-18 Argonaut Holdings, LLC.; By Argonaut Private Equity, L.L.C., Manager; By /s/ Frederic Dorwart, Manager 2020-09-18 Sanford Energy Inc.; By /s/ Frederic Dorwart, President 2020-09-18 /s/ Frederic Dorwart, Attorney-in-fact for George B. Kaiser 2020-09-18 /s/ Jennifer Ishiguro, Attorney-in-fact for Steven R. Mitchell 2020-09-18 /s/ Jennifer Ishiguro, Attorney-in-fact for Robert A. Waldo 2020-09-18