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SiteOne Landscape Supply, Inc.

Wholesale-Professional & Commercial Equipment & SuppliesNYSELarge accelerated filer

Total Trades

61

Buys

0

Sells

33

Largest Trade

$1M+

Insiders

5

Institutional Funds

335

Inst. Value

$1M+

Activist Filings

20

Insider Trades

InsiderTitleTypeValueSharesPriceDate
GUTHRIE JOHN TEVPSELL$100K–$500K2K$134.83Dec 1, 2025
Diaz Fred MDirectorSELL$100K–$500K865$145.07Sep 3, 2025
BLACK DOUGCEOEXERCISE$500K+11K$51.59Jul 29, 2025
BLACK DOUGCEOSELL$500K+7K$132.09Jul 29, 2025
BLACK DOUGCEOSELL$1M+30K$129.28Jul 14, 2025
BLACK DOUGCEOEXERCISE$1M+45K$51.59Jul 14, 2025
Ketter JosephEVP, Human ResourcesEXERCISE$500K+40K$12.84Jul 3, 2025
Ketter JosephEVP, Human ResourcesSELL$1M+40K$126.28Jul 3, 2025
BLACK DOUGCEOSELL$500K+7K$131.92Feb 28, 2025
BLACK DOUGCEOEXERCISE$500K+11K$51.59Feb 28, 2025
Ketter JosephEVP, Human ResourcesSELL$500K+7K$142.20Nov 22, 2024
Ketter JosephEVP, Human ResourcesEXERCISE$50K–$100K7K$12.84Nov 22, 2024
BLACK DOUGCEOSELL$1M+10K$162.10Apr 18, 2024
BLACK DOUGCEOEXERCISE$100K–$500K10K$38.73Apr 18, 2024
Ketter JosephEVP, Human ResourcesSELL$50K–$100K550$165.30Mar 1, 2024
Ketter JosephEVP, Human ResourcesEXERCISE$1K–$15K550$12.84Mar 1, 2024
BLACK DOUGCEOEXERCISE$100K–$500K10K$38.73Feb 22, 2024
BLACK DOUGCEOSELL$1M+10K$162.64Feb 22, 2024
BLACK DOUGCEOSELL$1M+10K$153.29Jan 19, 2024
BLACK DOUGCEOEXERCISE$100K–$500K10K$38.73Jan 19, 2024
BLACK DOUGCEOSELL$1M+10K$165.37Dec 22, 2023
BLACK DOUGCEOEXERCISE$100K–$500K10K$38.73Dec 22, 2023
BLACK DOUGCEOSELL$1M+8K$140.27Nov 17, 2023
BLACK DOUGCEOEXERCISE$500K+14K$38.73Nov 17, 2023
BLACK DOUGCEOSELL$1M+8K$145.12Oct 20, 2023
BLACK DOUGCEOEXERCISE$100K–$500K14K$23.38Oct 20, 2023
BLACK DOUGCEOSELL$1M+8K$159.16Sep 22, 2023
BLACK DOUGCEOEXERCISE$50K–$100K14K$5.50Sep 22, 2023
BLACK DOUGCEOEXERCISE$50K–$100K14K$5.50Aug 25, 2023
BLACK DOUGCEOSELL$1M+8K$156.79Aug 25, 2023
GUTHRIE JOHN TEVPSELL$100K–$500K1K$164.47Aug 9, 2023
BLACK DOUGCEOSELL$1M+8K$167.33Jul 21, 2023
BLACK DOUGCEOEXERCISE$50K–$100K14K$5.50Jul 21, 2023
BLACK DOUGCEOEXERCISE$50K–$100K14K$5.50Jun 23, 2023
BLACK DOUGCEOSELL$1M+8K$161.32Jun 23, 2023
Brisendine L Briley JrEVPSELL$100K–$500K3K$160.00Jun 21, 2023
BLACK DOUGCEOEXERCISE$50K–$100K14K$5.50May 26, 2023
BLACK DOUGCEOSELL$1M+8K$141.27May 26, 2023
Brisendine L Briley JrEVPSELL$500K+4K$160.00Feb 3, 2023
BLACK DOUGCEOSELL$1M+9K$128.00Nov 18, 2022
BLACK DOUGCEOEXERCISE$100K–$500K20K$5.50Nov 18, 2022
BLACK DOUGCEOSELL$1M+10K$105.84Oct 14, 2022
BLACK DOUGCEOEXERCISE$100K–$500K20K$5.50Oct 14, 2022
BLACK DOUGCEOEXERCISE$100K–$500K20K$5.50Sep 16, 2022
BLACK DOUGCEOSELL$1M+10K$115.54Sep 16, 2022
BLACK DOUGCEOSELL$1M+9K$139.18Aug 19, 2022
BLACK DOUGCEOEXERCISE$100K–$500K20K$5.50Aug 19, 2022
BLACK DOUGCEOSELL$1M+10K$119.13Jul 15, 2022
BLACK DOUGCEOEXERCISE$100K–$500K20K$5.50Jul 15, 2022
BLACK DOUGCEOEXERCISE$100K–$500K20K$5.50Jun 17, 2022
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Institutional Ownership

13F filings as of Dec 31, 2025 · 335 funds holding

FundShares
WASATCH ADVISORS LP2.1M
Capital World Investors1.4M
Conestoga Capital Advisors, LLC1.1M
Impax Asset Management Group plc916K
STATE STREET CORP758K
DIMENSIONAL FUND ADVISORS LP699K
GEODE CAPITAL MANAGEMENT, LLC654K
Neuberger Berman Group LLC597K
CHARLES SCHWAB INVESTMENT MANAGEMENT INC562K
KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC475K
GENEVA CAPITAL MANAGEMENT LLC463K
Stephens Investment Management Group LLC438K
Southpoint Capital Advisors LP400K
AMERICAN CENTURY COMPANIES INC394K
BROWN ADVISORY INC380K
Handelsbanken Fonder AB371K
DF DENT & CO INC357K
ACK Asset Management LLC330K
Kinetic Partners Management, LP320K
Premier Fund Managers Ltd278K

Activist & 5%+ Owners

SC 13D/13G filings — investors holding 5%+ of outstanding shares

Kayne Anderson Rudnick Investment Management, LLC

SC 13G/A · Feb 13, 2026

6.0%

2.7M shares

T. Rowe Price Associates, Inc.

SC 13G/A · Nov 14, 2025

10.4%

4.7M shares

BlackRock, Inc.

SC 13G/A · Feb 5, 2025

4.6%

2.1M shares

T. ROWE PRICE ASSOCIATES, INC. 52-0556948

SC 13G/A · Nov 14, 2024

12.6%

5.7M shares

BlackRock, Inc.

SC 13G/A · Nov 8, 2024

5.7%

2.6M shares

BlackRock, Inc.

SC 13G/A · Oct 24, 2024

5.7%

2.6M shares

T. ROWE PRICE ASSOCIATES, INC. 52-0556948

SC 13G/A · Feb 14, 2024

11.5%

5.2M shares

The Vanguard Group - 23-1945930

SC 13G/A · Feb 13, 2024

9.2%

4.1M shares

Kayne Anderson Rudnick Investment Management, LLC 95-4575414

SC 13G/A · Feb 13, 2024

7.5%

3.4M shares

BlackRock, Inc.

SC 13G · Jan 25, 2024

8.9%

4.0M shares

Baillie Gifford & Co (Scottish partnership)

SC 13G/A · Aug 3, 2023

5.0%

2.2M shares

BlackRock, Inc.

SC 13G/A · Mar 8, 2023

4.8%

2.2M shares

T. ROWE PRICE ASSOCIATES, INC. 52-0556948

SC 13G/A · Feb 14, 2023

12.4%

5.6M shares

KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 95-4575414

SC 13G/A · Feb 10, 2023

10.1%

4.6M shares

KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 95-4575414

SC 13G/A · Feb 10, 2023

9.9%

4.5M shares

Baillie Gifford & Co (Scottish partnership)

SC 13G/A · Jan 20, 2023

5.5%

2.5M shares

T. ROWE PRICE ASSOCIATES, INC. 52-0556948

SC 13G/A · Apr 11, 2022

10.2%

4.6M shares

T. ROWE PRICE ASSOCIATES, INC. 52-0556948

SC 13G/A · Feb 14, 2022

9.3%

4.2M shares

KAYNE ANDERSON RUDNICK INVESTMENT MANAGEMENT LLC 95-4575414

SC 13G/A · Feb 11, 2022

10.3%

4.6M shares

Baillie Gifford & Co (Scottish partnership)

SC 13G/A · Jan 26, 2022

8.3%

3.7M shares

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