SiteOne Landscape Supply, Inc.
MX ˙ BMV ˙ US82982L1035
SecurityMX:SITE / SiteOne Landscape Supply, Inc.
InstitutionRhumbline Advisers
Latest Disclosed Ownership41,654 shares
Latest Disclosed Value $ 5,544,520
Rhumbline Advisers reports 1.69% decrease in ownership of SITE / SiteOne Landscape Supply, Inc.

On May 12, 2026 - Rhumbline Advisers filed a 13F-HR form disclosing ownership of 41,654 shares of SiteOne Landscape Supply, Inc. (MX:SITE) valued at $5,544,520 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 42,371 shares of SiteOne Landscape Supply, Inc.. This represents a change in shares of -1.69% 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)
2026-05-12 2026-03-31 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 41,654 -717 -1.69 5,545 5.06 0.0047
2026-02-13 2025-12-31 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 42,371 -1,274 -2.92 5,278 -6.12 0.0043
2025-11-06 2025-09-30 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 43,645 -894 -2.01 5,621 4.36 0.0045
2025-08-12 2025-06-30 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 44,539 -5,498 -10.99 5,386 -11.36 0.0046
2025-05-29 2025-03-31 13F/A-1 SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 50,037 2,635 5.56 6,076 -2.72 0.0057
2025-04-08 2025-03-31 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 50,037 2,635 6,076 0.0057
2025-05-29 2024-12-31 13F/A-1 SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 47,402 -89 -0.19 6,246 -12.84 0.0056
2025-01-30 2024-12-31 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 47,402 -89 6,246 0.0056
2024-11-12 2024-09-30 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 47,491 709 1.52 7,167 26.18 0.0065
2024-08-01 2024-06-30 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 46,782 -216 -0.46 5,680 -30.77 0.0053
2024-05-09 2024-03-31 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 46,998 -5,656 -10.74 8,203 -4.13 0.0079
2024-02-08 2023-12-31 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 52,654 -352 -0.66 8,556 -1.24 0.0090
2023-11-09 2023-09-30 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 53,006 -1,090 -2.01 8,664 -4.31 0.0101
2023-08-08 2023-06-30 13F SITEONE LANDSCAPE SUPPLY INC COM COM 82982L103 54,096 3,513 6.95 9,054 150,783.33 0.0101
2023-05-11 2023-03-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 50,583 2,226 4.60 7 -99.89 0.0085
2023-02-14 2022-12-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 48,357 2,547 5.56 5,673 18.91 0.0076
2022-11-10 2022-09-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 45,810 2,577 5.96 4,771 -7.16 0.0071
2022-08-11 2022-06-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 43,233 5,477 14.51 5,139 -15.82 0.0075
2022-05-12 2022-03-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 37,756 -3,414 -8.29 6,105 -38.80 0.0079
2022-02-10 2021-12-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 41,170 1,373 3.45 9,975 25.66 0.0122
2021-11-12 2021-09-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 39,797 -1,910 -4.58 7,938 12.45 0.0107
2021-08-05 2021-06-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 41,707 -5,833 -12.27 7,059 -13.03 0.0093
2021-05-06 2021-03-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 47,540 -5,883 -11.01 8,117 -4.21 0.0110
2021-02-10 2020-12-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 53,423 2,044 3.98 8,474 35.24 0.0117
2020-11-12 2020-09-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 51,379 -10,215 -16.58 6,266 -10.74 0.0098
2020-08-13 2020-06-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 61,594 5,659 10.12 7,020 70.47 0.0117
2020-05-06 2020-03-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 55,935 -3 -0.01 4,118 -18.79 0.0086
2020-02-05 2019-12-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 55,938 1,734 3.20 5,071 26.40 0.0085
2019-10-23 2019-09-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 54,204 -304 -0.56 4,012 6.22 0.0073
2019-08-14 2019-06-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 54,508 1,085 2.03 3,777 23.71 0.0071
2019-05-01 2019-03-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 53,423 502 0.95 3,053 4.38 0.0059
2019-01-31 2018-12-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 52,921 16,938 47.07 2,925 7.89 0.0064
2018-11-07 2018-09-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 35,983 -2,602 -6.74 2,711 -16.33 0.0052
2018-11-07 2018-09-30 13F DDR CORP COM COM 23317H854 158,177 -8,792 2,118 0.0041
2018-08-06 2018-06-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 38,585 6,605 20.65 3,240 31.49 0.0065
2018-08-06 2018-06-30 13F DDR CORP COM COM 23317H854 166,969 -175,449 2,989 0.0060
2018-05-02 2018-03-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 31,980 -995 -3.02 2,464 -2.57 0.0051
2018-05-02 2018-03-31 13F DDR CORP COM COM 23317H102 342,418 2,614 2,510 0.0052
2018-02-09 2017-12-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 32,975 -6,001 -15.40 2,529 11.66 0.0051
2018-02-09 2017-12-31 13F DDR CORP COM COM 23317H102 339,804 -2,647 3,045 0.0062
2017-11-06 2017-09-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 38,976 750 1.96 2,265 13.82 0.0049
2017-11-06 2017-09-30 13F DDR CORP COM COM 23317H102 342,451 -1,366 3,137 0.0068
2017-08-02 2017-06-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 38,226 25,189 193.21 1,990 215.37 0.0045
2017-08-02 2017-06-30 13F DDR CORP COM COM 23317H102 343,817 -21,119 3,118 0.0071
2017-05-02 2017-03-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 13,037 1,197 10.11 631 53.53 0.0015
2017-05-02 2017-03-31 13F DDR CORP COM COM 23317H102 364,936 38,255 4,573 0.0107
2017-01-27 2016-12-31 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 11,840 895 8.18 411 4.58 0.0010
2017-01-27 2016-12-31 13F DDR CORP COM COM 23317H102 326,681 48,724 4,988 0.0126
2016-11-08 2016-09-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 10,945 900 8.96 393 15.25 0.0011
2016-11-08 2016-09-30 13F DDR CORP COM COM 23317H102 277,957 20,898 4,845 0.0134
2016-08-11 2016-06-30 13F SITEONE LANDSCAPE SUPPLY INC C COM 82982L103 10,045 -217,667 -95.59 341 -91.58 0.0010
2016-08-11 2016-06-30 13F DDR CORP COM COM 23317H102 257,059 29,347 4,663 0.0138
2016-05-02 2016-03-31 13F DDR CORP COM 23317H102 227,712 3,908 1.75 4,051 7.48 0.0126
2016-02-03 2015-12-31 13F DDR CORP COM 23317H102 223,804 1,895 0.85 3,769 10.43 0.0121
2015-11-04 2015-09-30 13F DDR CORP COM 23317H102 221,909 13,518 6.49 3,413 5.93 0.0116
2015-08-04 2015-06-30 13F DDR CORP COM 23317H102 208,391 -4,807 -2.25 3,222 -18.84 0.0103
2015-05-12 2015-03-31 13F DDR CORP COM 23317H102 213,198 2,340 1.11 3,970 2.56 0.0115
2015-02-06 2014-12-31 13F DDR CORP COM 23317H102 210,858 5,645 2.75 3,871 12.76 0.0112
2014-11-12 2014-09-30 13F DDR CORP COM 23317H102 205,213 -2,700 -1.30 3,433 -6.36 0.0103
2014-08-06 2014-06-30 13F DDR CORP COM 23317H102 207,913 1,417 0.69 3,666 7.73 0.0108
2014-05-06 2014-03-31 13F DDR CORP COM 23317H102 206,496 -6,520 -3.06 3,403 3.94 0.0101
2014-02-03 2013-12-31 13F DDR CORP COM 23317H102 213,016 -1,319 -0.62 3,274 -2.76 0.0097
2013-11-05 2013-09-30 13F DDR CORP COM 23317H102 214,335 -755 -0.35 3,367 -5.98 0.0104
2013-08-07 2013-06-30 13F DDR CORP COM 23317H102 215,090 215,090 3,581 0.0115
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.