SiteOne Landscape Supply, Inc.
MX ˙ BMV ˙ US82982L1035
SecurityMX:SITE / SiteOne Landscape Supply, Inc.
InstitutionFred Alger Management, Llc
Latest Disclosed Ownership176,855 shares
Latest Disclosed Value $ 23,541,169
Fred Alger Management, Llc reports 29.89% decrease in ownership of SITE / SiteOne Landscape Supply, Inc.

On May 15, 2026 - Fred Alger Management, Llc filed a 13F-HR form disclosing ownership of 176,855 shares of SiteOne Landscape Supply, Inc. (MX:SITE) valued at $23,541,169 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 17, 2026 disclosing 252,268 shares of SiteOne Landscape Supply, Inc.. This represents a change in shares of -29.89% 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 Equity 82982L103 176,855 -75,413 -29.89 23,541 -25.08 0.0658
2026-02-17 2025-12-31 13F SiteOne Landscape Supply Equity 82982L103 252,268 -105,625 -29.51 31,423 -31.83 0.1232
2025-11-14 2025-09-30 13F SiteOne Landscape Supply Equity 82982L103 357,893 -52,656 -12.83 46,097 -7.16 0.1794
2025-08-14 2025-06-30 13F SiteOne Landscape Supply Equity 82982L103 410,549 10,964 2.74 49,652 2.32 0.2222
2025-05-16 2025-03-31 13F SiteOne Landscape Supply Equity 82982L103 399,585 58,129 17.02 48,526 7.85 0.2764
2025-02-14 2024-12-31 13F SiteOne Landscape Supply Equity 82982L103 341,456 -50,851 -12.96 44,994 -24.00 0.2144
2024-11-14 2024-09-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 392,307 -40,637 -9.39 59,203 12.63 0.2870
2024-08-14 2024-06-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 432,944 -112,173 -20.58 52,564 -44.76 0.2555
2024-05-15 2024-03-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 545,117 -3,780 -0.69 95,150 6.68 0.4718
2024-02-14 2023-12-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 548,897 -80,981 -12.86 89,196 -13.36 0.4812
2023-11-14 2023-09-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 629,878 -18,230 -2.81 102,954 -5.08 0.5458
2023-11-14 2023-09-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 629,878 102,954
2023-08-14 2023-06-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 648,108 -27,188 -4.03 108,467 17.35 0.5541
2023-05-16 2023-03-31 13F/A-1 SITEONE LANDSCAPE SUPPLY Common 82982L103 675,296 -16,604 -2.40 92,428 13.86 0.4943
2023-05-15 2023-03-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 675,296 -16,604 92,428 0.4583
2023-02-14 2022-12-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 691,900 -41,054 -5.60 81,174 6.34 0.4400
2022-11-15 2022-09-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 732,954 -54,971 -6.98 76,330 -18.50 0.3868
2022-08-15 2022-06-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 787,925 -186,789 -19.16 93,660 -40.57 0.4374
2022-05-16 2022-03-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 974,714 -305,006 -23.83 157,602 -49.17 0.5035
2022-02-14 2021-12-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 1,279,720 101,890 8.65 310,051 31.97 0.7767
2021-11-15 2021-09-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 1,177,830 289,229 32.55 234,942 56.21 0.5602
2021-08-16 2021-06-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 888,601 292,190 48.99 150,405 47.70 0.3550
2021-05-17 2021-03-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 596,411 -17,526 -2.85 101,831 4.56 0.2664
2021-02-16 2020-12-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 613,937 6,839 1.13 97,389 31.54 0.2534
2020-11-13 2020-09-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 607,098 -14,847 -2.39 74,036 4.45 0.2149
2020-08-14 2020-06-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 621,945 6,067 0.99 70,883 56.33 0.2335
2020-05-19 2020-03-31 13F/A-1 SITEONE LANDSCAPE SUPPLY Common 82982L103 615,878 82,365 15.44 45,341 -6.25 0.1992
2020-05-15 2020-03-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 615,878 82,365 45,341 199,489.3028
2020-02-14 2019-12-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 533,513 -75,739 -12.43 48,363 7.24 0.1780
2019-11-14 2019-09-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 609,252 18,416 3.12 45,097 10.14 0.1770
2019-08-14 2019-06-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 590,836 -24,744 -4.02 40,945 16.39 0.1573
2019-05-14 2019-03-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 615,580 39,214 6.80 35,180 10.43 0.1401
2019-02-14 2018-12-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 576,366 234,520 68.60 31,856 23.69 0.1466
2018-11-14 2018-09-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 341,846 22,404 7.01 25,755 -3.99 0.0967
2018-07-19 2018-06-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 319,442 -26,552 -7.67 26,824 0.63 0.1126
2018-05-10 2018-03-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 345,994 2,434 0.71 26,655 1.15 0.1239
2018-02-14 2017-12-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 343,560 -29,044 -7.79 26,351 21.72 0.1189
2017-11-14 2017-09-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 372,604 -16,807 -4.32 21,648 6.78 0.1013
2017-08-14 2017-06-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 389,411 -69,743 -15.19 20,273 -8.80 0.0968
2017-05-15 2017-03-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 459,154 459,154 22,228 0.1106
2017-02-14 2016-12-31 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 0 -25,596 -100.00 0 -100.00
2016-11-14 2016-09-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 25,596 -34,704 -57.55 920 -55.12 0.0047
2016-08-15 2016-06-30 13F SITEONE LANDSCAPE SUPPLY Common 82982L103 60,300 60,300 2,050 0.0108
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.