X0306 4 2021-09-24 0 0001821806 Leslie's, Inc. LESL 0001807130 Strain John 2005 EAST INDIAN SCHOOL ROAD PHOENIX AZ 85016 1 0 0 0 Common Stock, par value $0.001 per share 2021-09-24 4 M 0 12221 0.00 A 50442 D Restricted Stock Units 0.00 2021-09-24 4 M 0 12221 0.00 D Common Stock 12221 19574 D Each RSU represents the contingent right to receive, upon vesting of the RSU, one share of the Issuer's Common Stock. Represents a grant of RSUs, of which 12,221 vested on September 24, 2021, and of which the remaining 12,221 RSUs will vest on September 24, 2022, subject to Mr. Strain's continuous employment of service with the Issuer or an affiliate until the applicable vesting date. /s/ Brad A. Gazaway, as Attorney-in-Fact for John Strain 2021-10-01