SiteOne Landscape Supply (NYSE: SITE) CEO adds 8,000 shares via trust

Rhea-AI Filing Summary

SiteOne Landscape Supply, Inc. CEO Doug Black reported open-market purchases of a total of 8,000 shares of common stock on August 4, 2026, through a family trust for which he serves as trustee, at prices of $101.94 and $102.13 per share. Following these transactions, he is reported to hold 482,161 shares directly and 93,675 shares indirectly through a SLAT, with additional indirect holdings in family trusts. The Rule 10b5-1 trading-plan checkbox was not marked, indicating these purchases were not reported as made pursuant to a pre-arranged trading plan.

Insider Trade Summary

Net Buyer: 8,000 shares

Net Buy 5 txns

Insider BLACK DOUG

Role CEO

Bought 8,000 shs ($816K)

Type	Security	Shares	Price	Value
Purchase	Common Stock F1	4,000	$101.94	$408K
Purchase	Common Stock F1	4,000	$102.13	$409K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--
holding	Common Stock F2	--	--	--

Holdings After Transaction: Common Stock — 21,591 shares (Indirect, By 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: 8,000 shares Purchase price 1: $101.94 per share Purchase price 2: $102.13 per share +2 more

5 metrics

Shares purchased 8,000 shares Total SITE common shares bought indirectly by family trust on August 4, 2026

Purchase price 1 $101.94 per share First 4,000-share purchase by family trust on August 4, 2026

Purchase price 2 $102.13 per share Second 4,000-share purchase by family trust on August 4, 2026

Direct holdings 482,161 shares Common stock held directly by Doug Black after reported transactions

Indirect SLAT holdings 93,675 shares Common stock held indirectly by Doug Black through a SLAT after transactions

Key Terms

indirect ownership, Family Trust, SLAT, Rule 10b5-1

4 terms

indirect ownership financial

"Shares are reported as held through trusts, reflecting indirect ownership rather than direct holding."

Family Trust financial

"Nature of ownership is described as "By Family Trust" for the purchased shares."

SLAT financial

"Nature of ownership is listed as "By SLAT" for certain indirect holdings."

Rule 10b5-1 regulatory

"The Rule 10b5-1 checkbox is not marked, indicating no trading plan was reported."

Rule 10b5-1 is a regulation that allows company insiders to buy or sell their shares at predetermined times, even if they have access to non-public information. It acts like setting a schedule in advance for transactions, helping prevent accusations of unfair trading. This rule provides a way for insiders to plan trades transparently, giving investors confidence that these transactions are not based on hidden information.

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

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/06/2026 - 05:42 PM Accepted by SEC EDGAR 08/06/2026 - 05:41 PM Learn about SEC filing dates

FAQ

What insider buying did SITE CEO Doug Black report on August 4, 2026?

Doug Black reported his family trust purchased 8,000 SITE shares on August 4, 2026, in two open-market trades at $101.94 and $102.13 per share. These purchases were reported as indirect ownership through a family trust where he serves as trustee.

At what prices did the Doug Black family trust purchase SITE shares?

The family trust associated with CEO Doug Black bought 4,000 SITE shares at $101.94 and another 4,000 shares at $102.13 on August 4, 2026. Both transactions involved common stock and were reported as open-market or private purchases.

How many SITE shares does Doug Black hold directly and indirectly after these trades?

After the reported transactions, Doug Black is shown holding 482,161 SITE shares directly and 93,675 shares indirectly through a SLAT. He also has additional indirect holdings in family trusts, including the trust that purchased the recent 8,000 shares.

Were the August 2026 SITE insider purchases under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox was left unchecked, so the 8,000-share purchase by Doug Black’s family trust was not reported as made pursuant to a Rule 10b5-1 trading plan or similar pre-arranged arrangement.

How are the newly purchased SITE shares held for CEO Doug Black?

The newly acquired 8,000 SITE shares are held indirectly by a family trust for which Doug Black serves as trustee. This structure means the ownership is reported as indirect, rather than as shares held directly in his own name.

What indirect SITE holdings does Doug Black report besides the new purchases?

In addition to the new 8,000-share purchase, Doug Black reports 93,675 SITE shares held indirectly through a SLAT and further indirect holdings in a family trust for which his spouse serves as trustee, reflecting multiple trust-based ownership structures.

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)
08/04/2026

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	08/04/2026		P		4,000	A	$101.94	4,000	I	By Family Trust(1)
Common Stock	08/04/2026		P		4,000	A	$102.13	8,000	I	By Family Trust(1)
Common Stock								482,161	D
Common Stock								93,675	I	By SLAT
Common Stock								13,591	I	By Family Trust(2)

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	08/06/2026
	** 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)