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CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY Statement - USD ($) shares in Millions, $ in Millions | Total | Common Class | Common Class Common Class A | Additional Paid-in Capital | Accumulated Other Comprehensive Income (Loss) | Retained Earnings | Treasury Stock At Cost
--- | --- | --- | --- | --- | --- | --- | ---
Beginning balance at May. 31, 2024 | $ 1,018.1 | $ 0.4 | $ 0.0 | $ 604.6 | $ (52.5) | $ 1,023.7 | $ (558.1)
Balance (in shares) at Aug. 31, 2024 |  | 27.3 | 0.8 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | (62.5) |  |  |  |  | (62.5) |
Foreign currency translation adjustments | 8.2 |  |  |  | 8.2 |  |
Pension and post-retirement adjustments (net of tax of $0.0) | 0.2 |  |  |  | 0.2 |  |
Stock-based compensation | 2.2 |  |  | 2.2 |  |  |
Proceeds pursuant to stock-based compensation plans | 0.1 |  |  | 0.1 |  |  |
Purchases of treasury stock at cost (in shares) |  | (0.2) |  |  |  |  |
Purchases of treasury stock at cost | (5.0) |  |  |  |  |  | (5.0)
Treasury stock issued pursuant to equity-based plans (in shares) |  | 0.1 |  |  |  |  |
Treasury stock issued pursuant to equity-based plans | 1.6 |  |  | (0.6) |  |  | 2.2
Dividends | (5.6) |  |  |  |  | (5.6) |
Ending Balance at Aug. 31, 2024 | 957.3 | $ 0.4 | $ 0.0 | 606.3 | (44.1) | 955.6 | (560.9)
Balance (in shares) at May. 31, 2024 |  | 27.4 | 0.8 |  |  |  |
Beginning balance at May. 31, 2025 | 946.5 | $ 0.4 | $ 0.0 | 607.1 | (41.5) | 999.7 | (619.2)
Balance (in shares) at Aug. 31, 2025 |  | 24.3 | 0.8 |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |
Net income (loss) | (71.1) |  |  |  |  | (71.1) |
Foreign currency translation adjustments | 3.5 |  |  |  | 3.5 |  |
Pension and post-retirement adjustments (net of tax of $0.0) | 0.3 |  |  |  | 0.3 |  |
Stock-based compensation | 1.9 |  |  | 1.9 |  |  |
Proceeds pursuant to stock-based compensation plans | 0.5 |  |  | 0.5 |  |  |
Treasury stock issued pursuant to equity-based plans (in shares) |  | 0.1 |  |  |  |  |
Treasury stock issued pursuant to equity-based plans | 1.5 |  |  | (1.6) |  |  | 3.1
Dividends | (5.1) |  |  |  |  | (5.1) |
Ending Balance at Aug. 31, 2025 | $ 878.0 | $ 0.4 | $ 0.0 | $ 607.9 | $ (37.7) | $ 923.5 | $ (616.1)
Balance (in shares) at May. 31, 2025 |  | 24.2 | 0.8 |  |  |  |

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