X0508 4 2026-03-09 0 0001868726 OLAPLEX HOLDINGS, INC. OLPX 0002055468 Duffy John C C/O OLAPLEX HOLDINGS, INC. 432 PARK AVENUE SOUTH, THIRD FLOOR NEW YORK NY 10016 0 1 0 0 General Counsel 0 Common Stock 2026-03-09 4 S 0 34824 1.26 D 633202 D Common Stock 2026-03-10 4 A 0 384615 0 A 1017817 D Required number of shares sold by the Reporting Person to cover tax withholding obligations in connection with the vesting of restricted stock units ("RSUs"). This sale was made to satisfy tax withholding obligations through a "sell to cover" transaction pursuant to the terms of the applicable RSU award agreement. Represents RSUs granted to the Reporting Person under the Issuer's 2021 Equity Incentive Plan. Each RSU represents the conditional right to receive one share of Common Stock of the Issuer. The RSUs will vest in four equal installments on each of March 10, 2027, March 10, 2028, March 10, 2029 and March 10, 2030, subject to the Reporting Person's continued employment with the Issuer through the applicable vesting date. /s/ John C. Duffy 2026-03-11