Earnings (Loss) Per Share

3 Months Ended

Mar. 29, 2026

The Company computes basic EPS by dividing Net income (loss) attributable to SiteOne by the weighted average number of common shares outstanding for the period. The Company includes vested RSUs, DSUs, and PSUs that have not been settled in common shares in the basic weighted average number of common shares calculation. The Company’s computation of diluted EPS reflects the potential dilution that could occur if dilutive securities or other obligations to issue common stock were exercised or converted into common stock, which include in-the-money outstanding stock options and RSUs. PSUs are excluded from the calculation of potential dilutive common shares until the performance conditions have been achieved on the basis of the assumption that the end of the reporting period was the end of the contingency period, if such issuable shares are dilutive. Using the treasury stock method, the effect of dilutive securities includes the additional shares of common stock that would have been outstanding based on the assumption that these potentially dilutive securities had been issued. The treasury stock method assumes proceeds from the exercise price of stock options and the unamortized compensation expense of RSUs and stock options are used to repurchase common shares at the average market price during the period, thus reducing the dilutive effect. RSUs and stock options with assumed proceeds per unit above the Company’s average share price for the periods presented are excluded from the diluted EPS calculation because the effect is anti-dilutive.

The following table sets forth the computation of the weighted average number of diluted common shares outstanding for the three months ended March 29, 2026 and March 30, 2025:


	Three Months Ended
		March 29, 2026	March 30, 2025
Shares used in the computation of basic earnings per share		44,586,582	45,084,610
Effect of dilutive securities:
Stock options		—	—
RSUs and PSUs		—	—
DSUs		—	—
Shares used in the computation of diluted earnings per share(a)		44,586,582	45,084,610

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(a) The shares used in the computation of diluted EPS do not give effect to any dilutive securities for the three months ended March 29, 2026 and March 30, 2025 as its inclusion would have the effect of decreasing the Net loss per common share.

The diluted earnings per common share calculation for the three months ended March 29, 2026 and March 30, 2025 excluded the effect of 728,511 and 959,387 potential shares of common stock, respectively, because the assumed exercises of a portion of the Company’s employee stock options and RSUs were anti-dilutive.