SiteOne (NYSE: SITE) CEO logs RSU vesting and tax share withholding

Rhea-AI Filing Summary

SiteOne Landscape Supply CEO and director Doug Black reported the vesting of 1,579 restricted stock units (RSUs) on February 10, 2026, which converted into an equal number of common shares. To cover tax obligations, 702 common shares were withheld at $148.78 per share, leaving 492,161 common shares held directly after these transactions. He also reports indirect ownership of 3,591 shares through a family trust for which his spouse is trustee, and 93,675 shares through a SLAT.

Insider Trade Summary

1,579 shares exercised/converted

Mixed 5 txns

Insider BLACK DOUG

Role CEO

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	1,579	$0.00	--
Exercise	Common Stock	1,579	$0.00	--
Tax Withholding	Common Stock	702	$148.78	$104K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Restricted Stock Units — 0 shares (Direct); Common Stock — 492,863 shares (Direct); Common Stock — 3,591 shares (Indirect, By Family Trust)

Footnotes (1)

1. Filed to report vesting of Restricted Stock Units ("RSUs"). RSUs convert into common stock on a one-for-one basis. Reflects indirect ownership by a family trust for which the Reporting Person's spouse serves as trustee. On February 10, 2022, the Reporting Person was granted 6,317 RSUs, vesting in four equal annual installments beginning on February 10, 2023, subject to the Reporting Person's continued employment.

Form 4 Insider Transactions: What Each Field Means →

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

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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)
02/10/2026

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	02/10/2026		M		1,579	A	(1)	492,863	D
Common Stock	02/10/2026		F		702	D	$148.78	492,161	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)	02/10/2026		M			1,579	(3)	(3)	Common Stock	1,579	$0.00	0	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 10, 2022, the Reporting Person was granted 6,317 RSUs, vesting in four equal annual installments beginning on February 10, 2023, subject to the Reporting Person's continued employment.

	/s/ Travis Jackson, Attorney-in-fact for Doug Black	02/12/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did SITE CEO Doug Black report on February 10, 2026?

Doug Black reported vesting of 1,579 restricted stock units that converted into 1,579 SiteOne common shares. As part of the same event, 702 shares were withheld at $148.78 per share to satisfy tax obligations, with the remaining shares added to his direct holdings.

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

After the reported transactions, Doug Black directly holds 492,161 SiteOne common shares. This figure reflects the 1,579 vested RSU shares added and the 702 shares withheld for taxes, as disclosed in the filing’s post-transaction beneficial ownership column.

What indirect SiteOne (SITE) shareholdings are associated with Doug Black?

In addition to his direct holdings, Doug Black reports 3,591 SiteOne shares held indirectly through a family trust and 93,675 shares held through a SLAT. The family trust is overseen by his spouse as trustee, according to the filing’s explanatory footnote.

What are the restricted stock units (RSUs) vesting in Doug Black’s SITE Form 4?

The RSUs represent a 2022 equity grant of 6,317 units vesting in four equal annual installments. On February 10, 2026, 1,579 of these RSUs vested and automatically converted into 1,579 SiteOne common shares on a one-for-one basis, contingent on his continued employment.

How were taxes handled for Doug Black’s vested SiteOne (SITE) RSUs?

Taxes were satisfied by withholding 702 shares of SiteOne common stock at $148.78 per share. This disposition is coded “F” in the filing, indicating payment of tax liability through delivery of shares rather than an open-market sale transaction.

What does transaction code M indicate in Doug Black’s SITE Form 4?

In this filing, transaction code M indicates an exercise or conversion of a derivative security. Specifically, 1,579 restricted stock units converted into 1,579 SiteOne common shares at an exercise price of $0.00, reflecting the vesting of previously granted equity awards.