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Nature of Business and Significant Accounting Policies (Policies)
 3 Months Ended
Mar. 29, 2026
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Redeemable Non-controlling Interest
Redeemable Non-controlling Interest

In accordance with Accounting Standards Codification (“ASC”) 480, Distinguishing Liabilities from Equity (Topic 480), the Company adjusted the carrying amount of the Redeemable non-controlling interest to what would be the redemption value assuming the security was redeemable as of the balance sheet date. During the three months ended March 29, 2026, the Company made an adjustment to the carrying amount of the Redeemable non-controlling interest of $2.6 million. There was no adjustment made during the three months ended March 30, 2025. Under ASC 480, the Company elected for the terms of the redemption feature to be fully considered in the measurement of Net income attributable to SiteOne with the offsetting entry for the redemption value adjustment recorded in Adjustment of non-controlling interest to redemption value in the Consolidated Statements of Operations during the three months ended March 29, 2026.
Basis of Financial Statement Presentation
Basis of Financial Statement Presentation

The accompanying unaudited consolidated financial statements of the Company have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) as applicable to interim financial reporting. In management’s opinion, the unaudited financial information for the interim periods presented includes all adjustments, consisting of normal recurring accruals necessary for a fair statement of the financial position, results of operations, and cash flows. Certain information and disclosures normally included in the Company’s annual financial statements prepared in accordance with GAAP have been condensed or omitted pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”). These interim unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto contained in the Company’s Annual Report on Form 10-K filed with the SEC for the fiscal year ended December 28, 2025. The interim period unaudited financial results for the three-month periods presented are not necessarily indicative of results to be expected for any other interim period or for the entire year.
Use of Estimates
Use of Estimates

The preparation of consolidated financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the amounts reported and disclosed in the financial statements and accompanying notes. Actual results could differ from these estimates.
Fiscal Year
Fiscal Year

The Company’s fiscal year is a 52- or 53-week period ending on the Sunday nearest to December 31. The Company’s fiscal year ending January 3, 2027 (the “2026 Fiscal Year”) includes 53 weeks and the Company’s fiscal year ended December 28, 2025 (the “2025 Fiscal Year”) included 52 weeks. Additionally, the Company’s fiscal quarters end on the Sunday nearest to March 31, June 30, and September 30, respectively. The three months ended March 29, 2026 and March 30, 2025 both included 13 weeks.
Principles of Consolidation
Principles of Consolidation

The Company’s consolidated financial statements include the assets and liabilities used in operating the Company’s business, including entities in which the Company owns or controls more than 50% of the voting shares. All intercompany balances and transactions have been eliminated in consolidation.
Recently Issued and Adopted Accounting Pronouncements/Accounting Pronouncements Issued But Not Yet Adopted
Recently Issued and Adopted Accounting Pronouncements

In July 2025, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) ASU 2025-05, “Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses for Accounts Receivable and Contract Assets” (“ASU 2025-05”), which revises the guidance in ASC 326 to provide a practical expedient and an accounting policy election related to the estimation of expected credit losses for current accounts receivable and current contract assets that arise from transactions accounted for under ASC 606. The Company adopted ASU 2025-05 as of December 29, 2025. The adoption of ASU 2025-05 did not have a material impact on the Company’s consolidated financial statements and related disclosures.

Accounting Pronouncements Issued But Not Yet Adopted
In November 2024, the FASB issued ASU 2024-03, “Expense Disaggregation Disclosures (Topic 220): Disaggregation of Income Statement Expenses” (“ASU 2024-03”), which requires public entities to disclose additional information that disaggregates certain expense captions into specified categories in the Notes to the consolidated financial statements. The new standard is effective for fiscal years beginning after December 15, 2026, and interim periods after December 15, 2027, with early adoption permitted. The disclosure updates are required to be applied prospectively with the option for retrospective application. The Company is currently evaluating the impact the amended guidance will have on its disclosures.

In May 2025, the FASB issued ASU 2025-03, “Business Combinations (Topic 805) and Consolidation (Topic 810): Determining the Accounting Acquirer in the Acquisition of a Variable Interest Entity” (“ASU 2025-03”), which revises the guidance in ASC 805 to clarify the requirements for identifying the accounting acquirer in a business combination that is effected by exchanging equity interests in which a variable interest entity is acquired. ASU 2025-03 is required to be adopted in the annual reporting periods beginning after December 15, 2026, including interim periods within those annual reporting periods, with early adoption permitted. The disclosure updates are required to be applied prospectively with the option for retrospective application. The Company is currently evaluating the impact the amended guidance will have on its consolidated financial statements and related disclosures.

In September 2025, the FASB issued ASU 2025-06, “Intangibles – Goodwill and Other Internal-Use Software: Targeted Improvements to the Accounting for Internal-Use Software” (“ASU 2025-06”), which amends the guidance in ASC 350 to revise the criteria as to when an entity is required to start capitalizing software costs and requires an entity to consider whether there is significant uncertainty associated with the development activities of the software when evaluating the probable-to-complete recognition threshold. ASU 2025-06 is required to be adopted in the annual reporting periods beginning after December 15, 2027, including interim periods within those annual reporting periods, with early adoption permitted. The Company is currently evaluating the impact the amended guidance will have on its consolidated financial statements and related disclosures.
In November 2025, the FASB issued ASU 2025-11, “Interim Reporting (Topic 270): Narrow-Scope Improvements” (“ASU 2025-11”), which amends the guidance in ASC 270 to clarify the applicability of interim disclosure requirements and enhance the navigability of the existing guidance. ASU 2025-11 provides a comprehensive list of required interim disclosures and establishes a new disclosure principle requiring entities to disclose events that occur after the end of the last annual reporting period. The new standard is effective for interim periods within annual reporting periods beginning after December 15, 2027, with early adoption permitted. The Company is currently evaluating the impact the amended guidance will have on its consolidated financial statements and related disclosures.

In December 2025, the FASB issued ASU 2025-12, “Codification Improvements” (“ASU 2025-12”), which clarifies existing guidance and makes improvements to 33 issues amongst various topics. ASU 2025-12 is effective for fiscal years beginning after December 15, 2026 and interim periods within those annual reporting periods. Early adoption is permitted on an issue-by-issue basis. The Company is currently evaluating the impact the amended guidance will have on its consolidated financial statements and related disclosures.
Fair Value Measurement
Fair value is defined as an exit price, representing an amount that would be received to sell an asset or the amount paid to transfer a liability in the principal or most advantageous market for the asset or liability in an orderly transaction between market participants on the measurement date. The inputs used to measure fair value are prioritized into the following three-tiered value hierarchy:
•Level 1: Unadjusted quoted prices in active markets for identical assets or liabilities.
•Level 2: Unadjusted quoted prices in active markets for similar assets or liabilities, unadjusted quoted prices for identical or similar assets or liabilities in markets that are not active or inputs, other than quoted prices in active markets, which are observable either directly or indirectly.
•Level 3: Unobservable inputs for which there is little or no market data.
The hierarchy is based upon the transparency of inputs to the valuation of an asset or liability as of the measurement date. The classification of fair value measurement within the hierarchy is based upon the lowest level of input that is significant to the measurement.

The Company’s financial instruments consist of Cash and cash equivalents, Accounts receivable, interest rate swap contracts, long-term debt, and Redeemable non-controlling interest. The variable interest rate on the long-term debt is reflective of current market borrowing rates. As such, the Company has determined that the carrying value of these financial instruments approximates fair value.