Kayne Anderson reports 4.6% SiteOne stake

Kayne Anderson Rudnick Investment Management, LLC reports beneficial ownership of 2,048,153 shares of SiteOne Landscape Supply Inc common stock, representing 4.6% of the class as of June 30, 2026.

Rhea-AI Filing Summary

Kayne Anderson Rudnick Investment Management, LLC reports beneficial ownership of 2,048,153 shares of SiteOne Landscape Supply Inc common stock, representing 4.6% of the class as of June 30, 2026. The firm has sole voting power over 1,534,246 shares and shared voting power over 342,550 shares. It holds sole dispositive power over 1,705,603 shares and shared dispositive power over 342,550 shares, indicating a mix of independently and jointly controlled positions in SITE.

Key Figures

Beneficial ownership: 2,048,153 shares Percent of class: 4.6% Sole voting power: 1,534,246 shares +3 more

6 metrics

Beneficial ownership 2,048,153 shares Total SiteOne common shares beneficially owned by Kayne Anderson Rudnick

Percent of class 4.6% Portion of SiteOne common stock class beneficially owned

Sole voting power 1,534,246 shares Shares for which Kayne Anderson Rudnick can solely direct the vote

Shared voting power 342,550 shares Shares with shared power to vote or direct the vote

Sole dispositive power 1,705,603 shares Shares for which it has sole power to dispose or direct disposition

Shared dispositive power 342,550 shares Shares with shared power to dispose or direct disposition

Key Terms

beneficially owned, sole voting power, shared dispositive power, Schedule 13G/A

4 terms

beneficially owned financial

"Amount beneficially owned: 2,048,153"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Sole power to vote or to direct the vote: 1,534,246"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

shared dispositive power financial

"Shared power to dispose or to direct the disposition of: 342,550"

Schedule 13G/A regulatory

"Form Type: SCHEDULE 13G/A"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

FAQ

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

What ownership stake in SITE does Kayne Anderson Rudnick report?

Kayne Anderson Rudnick Investment Management, LLC reports beneficial ownership of 2,048,153 shares of SiteOne Landscape Supply Inc (SITE), representing 4.6% of the company’s common stock as of June 30, 2026.

How much voting power does Kayne Anderson Rudnick have in SITE?

Kayne Anderson Rudnick reports sole voting power over 1,534,246 shares and shared voting power over 342,550 shares of SITE common stock, reflecting both independently and jointly controlled voting rights.

What dispositive power over SITE shares is reported by Kayne Anderson Rudnick?

The firm reports sole dispositive power over 1,705,603 shares and shared dispositive power over 342,550 shares of SITE common stock, defining how many shares it can direct to sell or otherwise dispose of.

What does the 4.6% ownership of SITE by Kayne Anderson Rudnick mean?

Kayne Anderson Rudnick’s 4.6% beneficial ownership means it controls voting or investment power over that portion of SITE’s outstanding common stock, through accounts it manages, without necessarily owning all shares outright.

Why does the SITE Schedule 13G/A note ownership of 5 percent or less?

The Schedule 13G/A for SITE includes an item stating ownership of 5 percent or less of a class, confirming Kayne Anderson Rudnick’s reported 4.6% stake is below the 5% threshold that often triggers additional reporting obligations.

Who signed the SITE Schedule 13G/A for Kayne Anderson Rudnick?

The Schedule 13G/A related to SITE was signed by Michael Shoemaker, serving as Chief Compliance Officer of Kayne Anderson Rudnick Investment Management, LLC, on August 13, 2026.

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

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Available on EDGAR 08/13/2026 - 04:07 PM Accepted by SEC EDGAR 08/13/2026 - 04:05 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 9)

SiteOne Landscape Supply Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

82982L103

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 82982L103

1

Names of Reporting Persons

Kayne Anderson Rudnick Investment Management, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

CALIFORNIA

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 1,534,246.00
6	Shared Voting Power 342,550.00
7	Sole Dispositive Power 1,705,603.00
8	Shared Dispositive Power 342,550.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

2,048,153.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

4.6 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: SiteOne Landscape Supply Inc
(b)	Address of issuer's principal executive offices: MANSELL OVERLOOK, 300 COLONIAL CENTER PARKWAY, SUITE 600, ROSWELL, GA, 30076
Item 2.
(a)	Name of person filing: Kayne Anderson Rudnick Investment Management, LLC
(b)	Address or principal business office or, if none, residence: Kayne Anderson Rudnick Investment Management, LLC - 2000 Avenue of the Stars, Suite 1110, Los Angeles, CA 90067, US
(c)	Citizenship: Kayne Anderson Rudnick Investment Management, LLC - CALIFORNIA
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 82982L103
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 2,048,153
(b)	Percent of class: 4.6 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 1,534,246
	(ii) Shared power to vote or to direct the vote: 342,550
	(iii) Sole power to dispose or to direct the disposition of: 1,705,603
	(iv) Shared power to dispose or to direct the disposition of: 342,550
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	Not Applicable
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Kayne Anderson Rudnick Investment Management, LLC

Signature:	/s/Michael Shoemaker
Name/Title:	Chief Compliance Officer
Date:	08/13/2026