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Income Attributable to Tennant Company Per Share
 9 Months Ended
Sep. 30, 2025
Earnings Per Share [Abstract]  
Income Attributable to Tennant Company Per Share Income Attributable to Tennant Company Per Share
The computations of basic and diluted earnings per share were as follows:
Three Months Ended
September 30,		Nine Months Ended
September 30,
2025202420252024
Numerator:
Net income$14.9 $20.8 $48.2 $77.1 
Denominator:
Basic - weighted average shares outstanding18,314,48818,810,26718,507,22218,790,824
Effect of dilutive securities233,236283,606215,031329,631
Diluted - weighted average shares outstanding18,547,72419,093,87318,722,25319,120,455
Basic earnings per share$0.81 $1.11 $2.60 $4.10 
Diluted earnings per share$0.80 $1.09 $2.57 $4.03 
Excluded from the dilutive securities presented above were options to purchase and shares to be paid out under share-based compensation plans totaling 44,322 and 4,124 shares of common stock for the three months ended September 30, 2025 and 2024, respectively. Excluded from the dilutive securities presented above were options to purchase and shares to be paid out under share-based compensation plans totaling 153,540 and 88,992 shares of common stock for the nine months ended September 30, 2025 and 2024, respectively. These instruments were excluded when their exercise prices exceeded the average market price of our common stock for the period, when the number of shares we can repurchase under the treasury stock method exceeded the
weighted average shares outstanding, or during periods of net loss, as their inclusion would have been anti-dilutive.