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Equity (Tables)

12 Months Ended

May 31, 2025

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
​		2025		2024		2023
Risk-free interest rate	​	4.2	%	4.1	%	3.1	%
Expected volatility of common stock		36.0	%	42.3	%	42.2	%
Dividend yield		0.0	%	0.0	%	0.0	%
Expected option term in years		4.9	​	5.1	​	5.2	​

​

Schedule of stock option activity

A summary of stock option activity for the three years ended May 31, 2025 consisted of the following (shares in thousands):

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2025

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2024

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2023

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​

​

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Weighted

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​

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Weighted

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​

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Weighted

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​

​

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Average

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​

​

Average

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​

​

Average

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Shares

Exercise Price

Shares

Exercise Price

Shares

Exercise Price

Outstanding at beginning of year

​

1,004

​

$

38.49

​

1,573

​

$

33.24

​

2,045

​

$

29.86

Granted

157

​

​

67.02

142

​

​

58.27

222

​

​

41.88

Exercised

(212)

​

​

29.81

(706)

​

​

30.67

(631)

​

​

25.31

Cancelled

(14)

​

​

60.59

(5)

​

​

48.40

(63)

​

​

33.25

Outstanding at end of year

935

​

$

44.94

1,004

​

$

38.49

1,573

​

$

33.24

Options exercisable at end of year

635

​

$

38.13

696

​

$

33.95

1,018

​

$

35.09

Schedule of restricted share activity

Restricted share activity during fiscal 2025 was as follows (shares in thousands):

​	​	​	​	​	​
​		​		Weighted Average
​	​	Number of	​	Fair Value
​		Shares		on Grant Date
Nonvested at May 31, 2024		636	​	$	48.84
Granted		287	​	​	60.68
Vested		(366)	​	​	47.05
Forfeited		(21)	​	​	58.51
Nonvested at May 31, 2025		536	​	​	56.47

​

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Tabular disclosure of the changes in outstanding nonvested shares.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions.

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