SiteOne Landscape Supply, Inc.
MX ˙ BMV ˙ US82982L1035
SecurityMX:SITE / SiteOne Landscape Supply, Inc.
InstitutionAdvisor Group Holdings, Inc.
Latest Disclosed Ownership8,057 shares
Latest Disclosed Value $ 1,072,447
Advisor Group Holdings, Inc. reports 4.20% decrease in ownership of SITE / SiteOne Landscape Supply, Inc.

On May 15, 2026 - Advisor Group Holdings, Inc. filed a 13F-HR form disclosing ownership of 8,057 shares of SiteOne Landscape Supply, Inc. (MX:SITE) valued at $1,072,447 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 8,410 shares of SiteOne Landscape Supply, Inc.. This represents a change in shares of -4.20% during the quarter.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-15 2026-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 8,057 -353 -4.20 1,072 2.39 0.0009
2026-02-17 2025-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 8,410 37 0.44 1,048 -11.65 0.0015
2025-11-14 2025-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 8,373 9 0.11 1,186 17.21 0.0017
2025-09-04 2025-06-30 13F/A-1 ITEONE LANDSCAPE SUPPLY COM 82982L103 8,364 -2,648 -24.05 1,012 -24.38 0.0018
2025-08-13 2025-06-30 13F ITEONE LANDSCAPE SUPPLY COM 82982L103 7,885 -3,127 1,033 0.0012
2025-05-12 2025-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 11,012 2,176 24.63 1,337 14.86 0.0030
2025-06-06 2024-12-31 13F/A-1 SITEONE LANDSCAPE SUPPLY COM 82982L103 8,836 -18,514 -67.69 1,164 -71.80 0.0026
2025-02-07 2024-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 6,754 -20,596 991 0.0025
2024-11-13 2024-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 27,350 1,975 7.78 4,127 33.99 0.0093
2024-08-13 2024-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 25,375 2,235 9.66 3,081 -23.74 0.0073
2024-05-10 2024-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 23,140 -24,479 -51.41 4,039 -47.80 0.0090
2024-02-12 2023-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 47,619 5,027 11.80 7,739 11.16 0.0135
2023-11-13 2023-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 42,592 10,844 34.16 6,962 31.02 0.0103
2023-08-21 2023-06-30 13F/A-1 SITEONE LANDSCAPE SUPPLY COM 82982L103 31,748 -4,452 -12.30 5,313 7.25 0.0095
2023-08-10 2023-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 31,748 -4,452 5,313 0.0014
2023-05-12 2023-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 36,200 -2,127 -5.55 4,954 10.19 0.0093
2023-02-10 2022-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 38,327 -4,184 -9.84 4,496 1.60 0.0091
2022-11-14 2022-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 42,511 311 0.74 4,425 -11.80 0.0101
2022-08-10 2022-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 42,200 4,037 10.58 5,017 -25.11 0.0111
2022-05-04 2022-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 38,163 5,263 16.00 6,699 -15.92 0.0130
2022-02-03 2021-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 32,900 5,776 21.29 7,967 47.21 0.0151
2021-11-05 2021-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 27,124 8,671 46.99 5,412 73.13 0.0113
2021-08-02 2021-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 18,453 -3,338 -15.32 3,126 -15.99 0.0068
2021-05-13 2021-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 21,791 -6,429 -22.78 3,721 -16.87 0.0090
2021-02-10 2020-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 28,220 14,239 101.85 4,476 162.83 0.0120
2020-11-12 2020-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 13,981 -10,441 -42.75 1,703 -38.83 0.0051
2020-08-14 2020-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 24,422 9,500 63.66 2,784 153.78 0.0093
2020-05-18 2020-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 14,922 14,922 1,097 0.0045
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.