SiteOne Landscape Supply, Inc.
MX ˙ BMV ˙ US82982L1035
SecurityMX:SITE / SiteOne Landscape Supply, Inc.
InstitutionVestmark Advisory Solutions, Inc.
Latest Disclosed Ownership22,068 shares
Latest Disclosed Value $ 2,937,604
Vestmark Advisory Solutions, Inc. reports 10.73% increase in ownership of SITE / SiteOne Landscape Supply, Inc.

On May 15, 2026 - Vestmark Advisory Solutions, Inc. filed a 13F-HR form disclosing ownership of 22,068 shares of SiteOne Landscape Supply, Inc. (MX:SITE) valued at $2,937,604 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 6, 2026 disclosing 19,930 shares of SiteOne Landscape Supply, Inc.. This represents a change in shares of 10.73% 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 22,068 2,138 10.73 2,938 18.33 0.0202
2026-02-06 2025-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 19,930 -3,614 -15.35 2,482 -18.14 0.0335
2025-11-10 2025-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 23,544 845 3.72 3,032 10.46 0.0578
2025-08-06 2025-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 22,699 -22,799 -50.11 2,745 -50.32 0.0396
2025-05-13 2025-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 45,498 26,159 135.27 5,525 116.84 0.1423
2025-02-06 2024-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 19,339 -2,236 -10.36 2,548 -21.72 0.0877
2024-11-14 2024-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 21,575 1,395 6.91 3,256 32.86 0.1212
2024-08-12 2024-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 20,180 786 4.05 2,450 -27.62 0.1023
2024-05-15 2024-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 19,394 1,539 8.62 3,385 16.68 0.1458
2024-02-06 2023-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 17,855 546 3.15 2,901 2.55 0.1474
2023-11-06 2023-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 17,309 -16,955 -49.48 2,829 -50.66 0.2057
2023-08-07 2023-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 34,264 -14,207 -29.31 5,734 -13.57 0.2184
2023-05-09 2023-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 48,471 847 1.78 6,634 18.74 0.2873
2023-01-20 2022-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 47,624 -100 -0.21 5,587 12.41 0.2722
2022-11-03 2022-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 47,724 2,080 4.56 4,970 -8.39 0.2770
2022-08-04 2022-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 45,644 5,556 13.86 5,425 -16.31 0.3099
2022-04-27 2022-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 40,088 1,650 4.29 6,482 -30.40 0.3669
2022-01-31 2021-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 38,438 2,984 8.42 9,313 31.69 0.5255
2021-11-15 2021-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 35,454 3,504 10.97 7,072 30.77 0.4790
2021-08-09 2021-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 31,950 -1,818 -5.38 5,408 -6.19 0.3848
2021-05-10 2021-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 33,768 11,676 52.85 5,765 64.53 0.5114
2021-02-04 2020-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 22,092 2,008 10.00 3,504 43.08 0.3932
2020-10-19 2020-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 20,084 2,471 14.03 2,449 22.02 0.3290
2020-08-13 2020-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 17,613 1,172 7.13 2,007 65.87 0.3105
2020-05-06 2020-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 16,441 862 5.53 1,210 -14.31 0.2365
2020-02-14 2019-12-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 15,579 884 6.02 1,412 29.78 0.2897
2019-11-05 2019-09-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 14,695 1,624 12.42 1,088 20.09 0.1764
2019-08-20 2019-06-30 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 13,071 691 5.58 906 27.97 0.1550
2019-05-14 2019-03-31 13F SITEONE LANDSCAPE SUPPLY COM 82982L103 12,380 12,380 708 0.1262
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.