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Equity (Tables)
12 Months Ended
May 31, 2026
Equity  
Schedule of assumptions used in the Black-Scholes option pricing model to estimate the fair value of stock option grant

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Stock Options Granted In Fiscal Year

 

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2026

  ​ ​ ​

2025

  ​ ​ ​

2024

 

Risk-free interest rate

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3.9

%  

4.2

%   

4.1

% 

Expected volatility of common stock

 

34.1

%  

36.0

%  

42.3

%

Dividend yield

 

0.0

%  

0.0

%  

0.0

%

Expected option term in years

 

4.8

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4.9

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5.1

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Schedule of stock option activity

A summary of stock option activity for the three years ended May 31, 2026 consisted of the following (shares in thousands):

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2026

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2025

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2024

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Weighted

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Weighted

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Weighted

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Average

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Average

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Average

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Shares

  ​ ​ ​

Exercise Price

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Shares

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Exercise Price

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Shares

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Exercise Price

Outstanding at beginning of year

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935

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$

44.94

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1,004

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$

38.49

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1,573

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$

33.24

Granted

 

160

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80.17

 

157

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67.02

 

142

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58.27

Exercised

 

(474)

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40.42

 

(212)

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29.81

 

(706)

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30.67

Cancelled

 

(27)

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72.61

 

(14)

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60.59

 

(5)

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48.40

Outstanding at end of year

 

594

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$

54.24

 

935

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$

44.94

 

1,004

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$

38.49

Options exercisable at end of year

 

318

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$

39.94

 

635

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$

38.13

 

696

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$

33.95

Schedule of restricted share activity

Restricted share activity during fiscal 2026 was as follows (shares in thousands):

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Weighted Average

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Number of

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Fair Value

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Shares

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on Grant Date

Nonvested at May 31, 2025

 

536

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$

56.47

Granted

 

287

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68.05

Vested

 

(268)

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44.16

Forfeited

 

(49)

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68.93

Nonvested at May 31, 2026

 

506

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68.31

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