SiteOne Landscape Supply, Inc. — Director's Dealing 2021

May 21, 2021

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: SiteOne Landscape Supply, Inc. (SITE)
CIK: 0001650729
Period of Report: 2021-05-19

Reporting Person: Weller Greg (EVP of Operations)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2021-05-19	Common Stock	M	1000	$66.10	Acquired	11435	Direct
2021-05-19	Common Stock	S	1000	$170.40	Disposed	10435	Direct
2021-05-20	Common Stock	G	175	$0.00	Disposed	10260	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2021-05-19	Stock Options (right to buy)	$66.10	M	1000	Disposed	2029-05-15	Common Stock (1000)	Direct

Footnotes

F1: The price reported in column 4 is a weighted average price. The shares were sold at prices ranging from $170.38 to $170.55, inclusive. Upon request by the SEC staff, the issuer, or any security holder of the issuer, full information regarding the number of shares purchased or sold at each separate price will be provided.

F2: Charitable gift.

F3: 2,908 options were granted on May 15, 2019, and vest and become exercisable ratably in four installments on each anniversary of May 15, 2019, subject to the Reporting Person's continued employment. Prior to the transactions reported on this Form 4, 1,454 of these options that remain outstanding had vested.