144 0001341537 XXXXXXXX LIVE 0000100378 TWIN DISC INC 001-07635 222 East Erie Street, Suite 400 Milwaukee WI 53202 262-638-4000 Knutson Jeffrey Scott (TWIN) Officer Common E*Trade from Morgan Stanley

PO Box 484 Jersey City NJ 07303-0484

7004 133000.00 14390226 06/05/2026 NASDAQ Common 07/27/2015 Stock award vesting Issuer N 2077 07/27/2015 Compensation Common 07/25/2016 Stock award vesting Issuer N 2139 07/25/2016 Compensation Common 07/30/2017 Stock award vesting Issuer N 2788 07/30/2017 Compensation Y 06/05/2026 /s/ Jeffrey S. Knutson