SiteOne director sells 1,125 SITE shares in plan trades

SiteOne Landscape Supply, Inc. director Fred M. Diaz reported selling a total of 1,125 shares of Common Stock in open-market transactions.

Rhea-AI Filing Summary

SiteOne Landscape Supply, Inc. director Fred M. Diaz reported selling a total of 1,125 shares of Common Stock in open-market transactions. He sold 563 shares at a price of $115.13 per share on May 27, 2026, and 562 shares at $112.52 per share on May 28, 2026. Following these sales, he directly holds 11,267 shares of Common Stock. The sales were carried out under a pre-arranged Rule 10b5-1 trading plan adopted on February 25, 2026.

Insider Trade Summary 10b5-1

Net Seller: 1,125 shares

Net Sell 2 txns

Insider Diaz Fred M

Role Director

Sold 1,125 shs ($128K)

Type	Security	Shares	Price	Value
Sale	Common Stock	562	$112.52	$63K
Sale	Common Stock	563	$115.13	$65K

Holdings After Transaction: Common Stock — 11,267 shares (Direct)

Footnotes (1)

1. F1. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on February 25, 2026.

Key Figures

Shares sold May 27, 2026: 563 shares at $115.13/share Shares sold May 28, 2026: 562 shares at $112.52/share Total shares sold: 1,125 shares +1 more

4 metrics

Shares sold May 27, 2026 563 shares at $115.13/share Open-market sale of Common Stock

Shares sold May 28, 2026 562 shares at $112.52/share Open-market sale of Common Stock

Total shares sold 1,125 shares Combined May 27–28, 2026 transactions

Shares held after transactions 11,267 shares Direct ownership after May 28, 2026 sale

Key Terms

Rule 10b5-1, open-market sale, Common Stock, Form 4

4 terms

Rule 10b5-1 regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 sales plan"

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.

open-market sale financial

"transaction_action: "open-market sale" with transaction code "S""

An open-market sale is when a shareholder sells existing shares directly on a public exchange to any willing buyer, rather than through a private deal. Think of it like putting goods on a busy market stall where price is set by supply and demand; for investors it matters because such sales increase available supply, can put short-term downward pressure on the stock price, and signal changes in liquidity or investor confidence.

Common Stock financial

"security_title: "Common Stock" for each non-derivative transaction"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

Form 4 regulatory

"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 sales plan"

Form 4 is a official document that company insiders, such as executives or major shareholders, file with regulators whenever they buy or sell company shares. It provides transparency about how those with inside knowledge are trading, helping investors see if insiders are confident in the company's prospects or may be selling for personal reasons. This information can influence investor decisions by revealing insiders' perspectives on the company's value.

FAQ

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

What insider transaction did Fred M. Diaz report for SiteOne (SITE)?

Fred M. Diaz reported selling 1,125 shares of SiteOne Common Stock. The sales occurred in two open-market transactions on May 27 and May 28, 2026, and were executed under a pre-arranged Rule 10b5-1 trading plan.

On what dates did the SITE director sell shares and at what prices?

The director sold shares on May 27 and May 28, 2026. He sold 563 shares at $115.13 per share on May 27 and 562 shares at $112.52 per share on May 28 in open-market transactions.

How many SiteOne (SITE) shares does Fred M. Diaz hold after these sales?

After the reported sales, Fred M. Diaz directly holds 11,267 shares of SiteOne Common Stock. This post-transaction holding reflects his remaining position as disclosed in the Form 4 filed for the May 2026 transactions.

Were the recent SITE stock sales by the director under a Rule 10b5-1 plan?

Yes, the sales were executed under a Rule 10b5-1 trading plan. The footnote states the plan was adopted by the reporting person on February 25, 2026, indicating the transactions were pre-arranged rather than discretionary.

What type of transactions were reported in this SiteOne (SITE) Form 4?

The Form 4 reports two non-derivative open-market sales of Common Stock. Both transactions used transaction code “S,” indicating sales in the open market or private transactions, with no derivative exercises or gifts disclosed.

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

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Accepted by SEC EDGAR 05/29/2026 - 04:16 PM Learn about SEC filing dates

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).

X

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^*

Diaz Fred M

(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
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
05/27/2026

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	05/27/2026		S(1)		563	D	$115.13	11,829	D
Common Stock	05/28/2026		S(1)		562	D	$112.52	11,267	D

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. The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 sales plan adopted by the Reporting Person on February 25, 2026.

	/s/ Travis Jackson, Attorney-in-fact for Fred M. Diaz	05/29/2026
	** 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)