144 0001570211 XXXXXXXX LIVE 0001866757 Brilliant Earth Group, Inc. 001-40836 300 Grant Avenue, Third Floor San Francisco CA 94108 8006910952 Mainsail Co-Investors III, L.P. Shareholder Class A Merrill Lynch 555 California Street 18th Floor San Francisco CA 94104 1079 1381.12 16907896 08/10/2026 Nasdaq Class A 09/23/2021 Pre-IPO Reorganization Issuer N 1079 09/23/2021 Securities of the issuer were received in a series of reorganization transactions in connection with the issuer's IPO on 9/23/2021. Y 08/10/2026 Gavin Turner