X0306 4 2020-08-23 0 0001697500 Solaris Oilfield Infrastructure, Inc. SOI 0001705383 Durrett Cynthia M. 9811 KATY FREEWAY SUITE 700 HOUSTON TX 77024 1 1 0 0 Chief Administrative Officer Class A common stock 2020-08-23 4 F 0 1838 7.51 D 78769 D Class B Common Stock 165038 D Solaris Oilfield Infrastructure, LLC Units Class A Common Stock 165038 165038 D Represents shares withheld by the Company to satisfy tax withholding obligations upon the vesting of previously granted Restricted Stock Awards. Includes 50,001 shares of Class A common stock subject to previously granted Restricted Stock Awards that remain subject to vesting. Each share of Class B common stock has no economic rights but entitles its holder to one vote on all matters to be voted on by stockholders generally. Subject to the terms of the Second Amended and Restated Limited Liability Company Agreement of Solaris Oilfield Infrastructure, LLC ("Solaris LLC"), dated as of May 11, 2017, included as Exhibit 10.1 to the Issuer's Current Report on Form 8-K filed May 17, 2017, the units in Solaris LLC (together with a corresponding number of shares of Class B common stock) are exchangeable from time to time for shares of Class A common stock of the Issuer. /s/ Cynthia M. Durrett 2020-08-25