X0306 4 2020-11-18 0 0001775625 SmileDirectClub, Inc. SDC 0001759120 CD&R Investment Associates X, Ltd. C/O MAPLES CORPORATE SERVICES LIMITED, UGLAND HOUSE, SOUTH CHURCH STREET GEORGETOWN E9 KY1-1104 CAYMAN ISLANDS 0 0 1 0 0001788172 CD&R SDC HOLDINGS, L.P. C/O MAPLES CORPORATE SERVICES LIMITED, UGLAND HOUSE, SOUTH CHURCH STREET GEORGETOWN E9 KY1-1104 CAYMAN ISLANDS 0 0 1 0 Class A common stock, $0.0001 par value 2020-11-18 4 S 0 5000000 10.50 D 21903123 I See Explanation of Responses On November 18, 2020, CD&R SDC Holdings, L.P. ("CD&R SDC") sold 5,000,000 shares of Class A common stock of the Registrant (the "Common Stock") in a secondary block trade pursuant to Rule 144 under the Securities Act of 1933, as amended. CD&R Investment Associates X, Ltd. ("CD&R SDC GP") is the general partner of CD&R SDC, the direct holder of the Common Stock. CD&R SDC GP, as the general partner of CD&R SDC, may be deemed to beneficially own the shares of Common Stock held by CD&R SDC. Investment and voting decisions with respect to the shares of Common Stock held by CD&R SDC or CD&R SDC GP are made by an investment committee comprised of more than ten individuals (the "CD&R SDC Investment Committee"). All members of the CD&R SDC Investment Committee disclaim beneficial ownership of the shares of Common Stock held by CD&R SDC. CD&R SDC GP expressly disclaims beneficial ownership of the shares held by CD&R SDC except to the extent of any pecuniary interest therein. /s/ Theresa A. Gore, Chief Financial Officer, Treasurer and Secretary of CD&R Investment Associates X, Ltd. 2020-11-20 /s/ Theresa A. Gore, Chief Financial Officer, Treasurer and Secretary of the General Partner of CD&R SDC Holdings, L.P. 2020-11-20