SiteOne (SITE) CEO Doug Black vests 3,094 RSUs, holds 490,123 shares

Rhea-AI Filing Summary

SiteOne Landscape Supply CEO Doug Black reported routine equity compensation activity. On February 7, 2026, 3,094 Restricted Stock Units vested and converted into the same number of common shares. To cover tax withholding, 967 shares were disposed of at a price of $150.01 per share.

After these transactions, Black directly owned 490,123 SiteOne common shares. He also had indirect ownership of 3,591 shares through a family trust and 93,675 shares through a SLAT. The vested RSUs come from a 12,375-unit award granted on February 7, 2024, scheduled to vest in four equal annual installments starting February 7, 2025, subject to his continued employment.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BLACK DOUG

(Last) (First) (Middle)

MANSELL OVERLOOK

300 COLONIAL CENTER PARKWAY, SUITE 600

(Street)

ROSWELL GA 30076

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
SiteOne Landscape Supply, Inc. [ SITE ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	CEO

3. Date of Earliest Transaction (Month/Day/Year)
02/07/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	02/07/2026		M		3,094	A	(1)	491,090	D
Common Stock	02/07/2026		F		967	D	$150.01	490,123	D
Common Stock								3,591	I	By Family Trust(2)
Common Stock								93,675	I	By SLAT

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Restricted Stock Units	(1)	02/07/2026		M			3,094	(3)	(3)	Common Stock	3,094	$0.00	6,187	D

Explanation of Responses:

1. Filed to report vesting of Restricted Stock Units ("RSUs"). RSUs convert into common stock on a one-for-one basis.

2. Reflects indirect ownership by a family trust for which the Reporting Person's spouse serves as trustee.

3. On February 7, 2024, the Reporting Person was granted 12,375 RSUs, vesting in four equal annual installments beginning on February 7, 2025, subject to the Reporting Person's continued employment.

	/s/ Travis Jackson, Attorney-in-fact for Doug Black	02/10/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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FAQ

What insider transaction did SITE CEO Doug Black report on February 7, 2026?

Doug Black reported the vesting of 3,094 Restricted Stock Units that converted into common stock on February 7, 2026. As part of this event, 967 shares were disposed of at $150.01 per share to satisfy tax withholding obligations related to the RSU vesting.

How many SiteOne (SITE) shares does Doug Black own after this Form 4 filing?

After the reported transactions, Doug Black directly owned 490,123 SiteOne common shares. He also indirectly owned 3,591 shares through a family trust and 93,675 shares through a SLAT, reflecting both his direct holdings and shares held through related entities.

What are the terms of Doug Black’s 12,375 RSU grant at SiteOne (SITE)?

Doug Black received 12,375 Restricted Stock Units on February 7, 2024. These RSUs vest in four equal annual installments beginning February 7, 2025, and each vested unit converts into one share of common stock, subject to his continued employment with SiteOne.

Why were 967 SiteOne (SITE) shares sold or withheld at $150.01 in this filing?

The 967 shares at $150.01 were disposed of to cover tax withholding arising from the vesting of 3,094 RSUs. This type of tax-related share withholding is a common administrative step when equity awards convert into common stock for executives.

How are Doug Black’s indirect SiteOne (SITE) share holdings structured?

Doug Black’s indirect holdings include 3,591 shares held by a family trust for which his spouse serves as trustee and 93,675 shares held by a SLAT. These entities hold shares on his behalf, expanding his overall economic exposure to SiteOne stock.

Do the RSUs in this SiteOne (SITE) Form 4 convert into common stock one-for-one?

Yes, the Restricted Stock Units convert into common stock on a one-for-one basis. When 3,094 RSUs vested on February 7, 2026, they produced 3,094 shares of SiteOne common stock, before any shares were withheld to satisfy associated tax obligations.