SiteOne Landscape Supply, Inc.
MX ˙ BMV ˙ US82982L1035
SecurityMX:SITE / SiteOne Landscape Supply, Inc.
InstitutionBamco Inc /ny/
Latest Disclosed Ownership2,059,076 shares
Latest Disclosed Value $ 274,083,606
Bamco Inc /ny/ reports 1.51% increase in ownership of SITE / SiteOne Landscape Supply, Inc.

On May 15, 2026 - Bamco Inc /ny/ filed a 13F-HR form disclosing ownership of 2,059,076 shares of SiteOne Landscape Supply, Inc. (MX:SITE) valued at $274,083,606 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 2,028,366 shares of SiteOne Landscape Supply, Inc.. This represents a change in shares of 1.51% 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 2,059,076 30,710 1.51 274,084 8.48 0.8273
2026-02-17 2025-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 2,028,366 61,490 3.13 252,653 -0.27 0.6845
2025-11-14 2025-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,966,876 25,059 1.29 253,334 7.87 0.6717
2025-08-14 2025-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,941,817 242,106 14.24 234,843 13.77 0.6366
2025-05-15 2025-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,699,711 46,939 2.84 206,413 -5.22 0.6063
2025-02-14 2024-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,652,772 72,430 4.58 217,786 -8.68 0.5630
2024-11-14 2024-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,580,342 129,252 8.91 238,489 35.37 0.6326
2024-08-14 2024-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,451,090 -44,747 -2.99 176,177 -32.52 0.5045
2024-05-15 2024-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,495,837 496 0.03 261,098 7.45 0.6959
2024-02-14 2023-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,495,341 74,734 5.26 242,993 4.65 0.6471
2023-11-14 2023-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,420,607 -30,115 -2.08 232,198 -4.36 0.6747
2023-08-14 2023-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,450,722 -36,383 -2.45 242,793 19.28 0.6723
2023-05-15 2023-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,487,105 -213,931 -12.58 203,540 1.99 0.6110
2023-02-14 2022-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,701,036 -26,491 -1.53 199,566 10.93 0.6701
2022-11-14 2022-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,727,527 10,988 0.64 179,905 -11.83 0.5812
2022-08-15 2022-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,716,539 659,006 62.32 204,045 19.33 0.6553
2022-05-13 2022-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,057,533 -478 -0.05 170,993 -33.29 0.4197
2022-02-14 2021-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,058,011 -67,503 -6.00 256,335 14.18 0.5437
2021-11-12 2021-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,125,514 34,262 3.14 224,506 21.55 0.5085
2021-08-13 2021-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,091,252 125 0.01 184,705 -0.86 0.4229
2021-05-19 2021-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,091,127 -186,480 -14.60 186,299 -8.08 0.4592
2021-02-12 2020-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,277,607 -25,477 -1.96 202,667 27.53 0.5014
2020-11-13 2020-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,303,084 -23,042 -1.74 158,911 5.14 0.4878
2020-08-14 2020-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,326,126 -136,892 -9.36 151,139 40.32 0.5464
2020-05-15 2020-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,463,018 -140,440 -8.76 107,707 -25.90 0.5278
2020-02-18 2019-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,603,458 -240,534 -13.04 145,353 6.49 0.5550
2019-11-14 2019-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,843,992 -153,525 -7.69 136,492 -1.40 0.5615
2019-08-15 2019-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,997,517 -137,627 -6.45 138,428 13.44 0.5550
2019-05-15 2019-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 2,135,144 593,332 38.48 122,023 43.19 0.5174
2019-02-14 2018-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,541,812 77,009 5.26 85,216 -22.78 0.4313
2018-11-14 2018-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,464,803 3,546 0.24 110,358 -10.06 0.4572
2018-08-14 2018-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,461,257 -122,949 -7.76 122,702 0.54 0.5364
2018-05-09 2018-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,584,206 -70,493 -4.26 122,047 -3.84 0.5616
2018-02-14 2017-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,654,699 -66,023 -3.84 126,915 26.95 0.5850
2017-11-15 2017-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,720,722 172,650 11.15 99,974 24.05 0.4744
2017-08-14 2017-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,548,072 -84,199 -5.16 80,593 1.99 0.4117
2017-05-15 2017-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,632,271 13,176 0.81 79,018 40.52 0.4184
2017-02-14 2016-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 1,619,095 764,966 89.56 56,231 83.23 0.3166
2016-11-15 2016-09-30 13F/A-1 SITEONE LANDSCAPE SUPPLY COM 82982L103 854,129 118,000 16.03 30,689 22.65 0.1627
2016-11-14 2016-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 854,129 30,689
2016-08-15 2016-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 736,129 736,129 25,021 0.1330
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.