SiteOne director receives 1,186 deferred stock units

Sansone Judith S reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Sansone Judith S reported acquisition or exercise transactions in this Form 4 filing.

SiteOne Landscape Supply, Inc. director Judith S. Sansone received an award of 1,186 deferred stock units of common stock as director fees. The award was granted at no cash cost per unit and increased her directly held equity position to 3,176 shares and units combined.

The deferred stock units vest in full on the earlier of the day before the company’s next annual stockholder meeting or the first anniversary of May 13, 2026. Settlement of these units into shares is deferred until the earlier of Sansone’s termination of board service or a change in control of the company.

Insider Trade Summary

Grant/Award: 1,186 shares

Grant/Award 1 txn

Insider Sansone Judith S

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	1,186	$0.00	$0.00

Holdings After Transaction: Common Stock — 3,176 shares (Direct)

Footnotes (2)

1. F1. Represents deferred stock units granted as director fees. The deferred stock units vest in full upon the earlier of (i) the day preceding the Company's next annual meeting of stockholders and (ii) the first anniversary of May 13, 2026. Settlement is deferred until the earlier of the Reporting Person's termination of board service and a change in control of the Company.
2. F2. Includes deferred stock units.

Key Figures

Deferred stock units granted: 1,186 units Grant price per unit: $0.00 per unit Total holdings after transaction: 3,176 shares/units +2 more

5 metrics

Deferred stock units granted 1,186 units Director fee award granted on May 13, 2026

Grant price per unit $0.00 per unit Equity compensation, no cash paid by director

Total holdings after transaction 3,176 shares/units Direct beneficial ownership following the award

Vesting trigger Earlier of pre-next annual meeting or 1-year anniversary Vests by day before next annual meeting or first anniversary of May 13, 2026

Settlement trigger Board service termination or change in control Delivery of shares occurs upon one of these events

Key Terms

deferred stock units, change in control, annual meeting of stockholders

3 terms

deferred stock units financial

"Represents deferred stock units granted as director fees."

Deferred stock units are promises from a company to give an employee shares of stock at a future date, often after certain conditions are met or after leaving the company. They function like a form of delayed compensation, allowing employees to earn shares over time. For investors, they represent potential future ownership in the company, but do not provide immediate voting rights or dividends until the shares are actually received.

change in control financial

"Settlement is deferred until the earlier of the Reporting Person's termination of board service and a change in control of the Company."

A "change in control" occurs when the ownership or management of a company shifts significantly, such as through a merger, acquisition, or sale of a large part of its assets. This change can impact how the company is run and may influence its future direction. For investors, it matters because it can affect the company's stability, strategy, and value, often signaling potential changes in investment risk or opportunity.

annual meeting of stockholders financial

"vest in full upon the earlier of (i) the day preceding the Company's next annual meeting of stockholders"

FAQ

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

What insider transaction did SiteOne (SITE) report for Judith S. Sansone?

SiteOne reported that director Judith S. Sansone received 1,186 deferred stock units of common stock as director fees. These units were granted at no cash cost and represent a compensation-related equity award rather than an open-market purchase or sale.

How many SiteOne (SITE) shares does Judith S. Sansone hold after this grant?

After the grant, Judith S. Sansone beneficially owns 3,176 SiteOne common shares and deferred stock units in total. This figure includes the newly awarded 1,186 deferred stock units and reflects her direct ownership position following the reported Form 4 transaction.

When do Judith S. Sansone’s new SiteOne (SITE) deferred stock units vest?

The deferred stock units vest in full on the earlier of the day preceding SiteOne’s next annual meeting of stockholders or the first anniversary of May 13, 2026. This structure ties vesting to the company’s annual governance cycle or a one-year service period.

When will Judith S. Sansone receive SiteOne (SITE) shares from these deferred stock units?

Settlement of the deferred stock units into SiteOne shares is postponed until the earlier of Sansone’s termination of board service or a change in control of the company. This means she accrues the award now, but delivery of shares occurs upon those future events.

Did Judith S. Sansone buy or sell SiteOne (SITE) stock in the market?

The Form 4 shows an acquisition coded as a grant or award, not an open-market trade. Sansone did not buy or sell shares for cash; instead, she received 1,186 deferred stock units as part of her director compensation package.

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

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Accepted by SEC EDGAR 05/14/2026 - 07:12 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).

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^*

Sansone Judith S

(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)
05/13/2026

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	05/13/2026		A		1,186(1)	A	$0	3,176(2)	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. Represents deferred stock units granted as director fees. The deferred stock units vest in full upon the earlier of (i) the day preceding the Company's next annual meeting of stockholders and (ii) the first anniversary of May 13, 2026. Settlement is deferred until the earlier of the Reporting Person's termination of board service and a change in control of the Company.

2. Includes deferred stock units.

Remarks:

Exhibit 24 - Power of Attorney

	/s/ Travis Jackson, Attorney-in-fact for Judith Sansone	05/14/2026
	** 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)