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

20010 500000.00 14390226 08/25/2026 NASDAQ Common 07/29/2019 Stock award vesting Issuer N 7482 07/29/2015 Compensation Common 07/31/2019 Stock award vesting Issuer N 5902 07/31/2019 Compensation Common 08/03/2020 Stock award vesting Issuer N 4302 08/03/2020 Compensation Common 08/01/2021 Stock award vesting Issuer N 1331 08/01/2021 Compensation Common 10/31/2022 Stock award vesting Issuer N 993 10/31/2022 Compensation Y 08/26/2026 /s/ Jeffrey S. Knutson