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 dilutive potential 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.


	Three Months Ended		Six Months Ended
	June 29, 2025	June 30, 2024	June 29, 2025	June 30, 2024
Shares used in the computation of basic earnings per share	44,817,997	45,266,829	44,951,303	45,265,407
Effect of dilutive securities:
Stock options	246,441	339,130	264,358	371,649
RSUs and PSUs	9,340	26,380	14,892	37,626
DSUs	15,663	14,989	14,549	12,978
Shares used in the computation of diluted earnings per share	45,089,441	45,647,328	45,245,102	45,687,660

The diluted earnings per common share calculation for the three months ended June 29, 2025 and June 30, 2024 excluded the effect of 411,032 and 210,957 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. In addition, the diluted earnings per common share calculation for the six months ended June 29, 2025 and June 30, 2024 excluded the anti-dilutive effect of 406,932 and 225,229 potential shares of common stock, respectively.