SiteOne CEO's family trusts buy 4,550 shares each

The CEO and director also reported 482,161 directly held shares and 93,675 shares held through a SLAT as of October 30, 2026.

Available on EDGAR 11/03/2026 - 06:50 PM EST Accepted by SEC EDGAR 11/03/2026 - 06:49 PM EST Learn about SEC filing dates

Rhea-AI Filing Summary

SiteOne Landscape Supply, Inc. CEO and director Doug Black reported two purchases by family trusts on October 30, 2026: the 2021 Family Trust bought 4,550 shares at $109.91 per share, and the 2019 Family Trust bought 4,550 shares at $110.68 per share. After those transactions, the trusts held 17,550 shares and 18,141 shares, respectively. Black serves as trustee of the 2021 trust; his spouse serves as trustee of the 2019 trust. No Rule 10b5-1 plan is reported.

Insider Trade Summary

Net Buyer: 9,100 shares

Net Buy 2 txns

Insider BLACK DOUG

Role CEO

Bought 9,100 shs ($1.00M)

Type	Security	Shares	Price	Value
Purchase	Common Stock F1	4,550	$109.91	$500K
Purchase	Common Stock F2	4,550	$110.68	$504K
Holding	Common Stock	--	--	--
Holding	Common Stock	--	--	--

Holdings After Transaction: Common Stock — 17,550 shares (Indirect, By 2021 Family Trust); Common Stock — 18,141 shares (Indirect, By 2019 Family Trust); Common Stock — 482,161 shares (Direct); Common Stock — 93,675 shares (Indirect, By SLAT)

Footnotes (2)

1. F1. Reflects indirect ownership by a family trust for which the Reporting Person serves as trustee.
2. F2. Reflects indirect ownership by a family trust for which the Reporting Person's spouse serves as trustee.

Key Figures

Shares purchased: 4,550 shares Purchase price: $109.91 per share Shares held after transaction: 17,550 shares +3 more

6 metrics

Shares purchased 4,550 shares 2021 Family Trust, October 30, 2026

Purchase price $109.91 per share 2021 Family Trust, October 30, 2026

Shares held after transaction 17,550 shares 2021 Family Trust, October 30, 2026

Shares purchased 4,550 shares 2019 Family Trust, October 30, 2026

Purchase price $110.68 per share 2019 Family Trust, October 30, 2026

Shares held after transaction 18,141 shares 2019 Family Trust, October 30, 2026

Key Terms

indirect ownership, family trust, SLAT

3 terms

indirect ownership financial

"Reflects indirect ownership by a family trust"

family trust financial

"indirect ownership by a family trust"

SLAT financial

"By SLAT"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

How many SITE shares did Doug Black's family trusts purchase, and at what prices?

The 2021 Family Trust purchased 4,550 shares at $109.91 per share, and the 2019 Family Trust purchased 4,550 shares at $110.68 per share on October 30, 2026. Doug Black serves as trustee of the 2021 trust, and his spouse serves as trustee of the 2019 trust. No Rule 10b5-1 plan is reported.

AI-generated analysis. How Rhea-AI works. Not financial advice.

Form 4 Insider Transactions: What Each Field Means →

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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 GEORGIA 30076

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
10/30/2026

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

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

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

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	10/30/2026		P		4,550	A	$109.91	17,550	I	By 2021 Family Trust(1)
Common Stock	10/30/2026		P		4,550	A	$110.68	18,141	I	By 2019 Family Trust(2)
Common Stock								482,161	D
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

Explanation of Responses:

1. Reflects indirect ownership by a family trust for which the Reporting Person serves as trustee.

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

	/s/ Travis Jackson, Attorney-in-fact for Doug Black	11/03/2026
	** 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.
* Form 4: SEC 1474 (03-26)