144 0000938071 XXXXXXXX LIVE 0001327811 WORKDAY, INC. 001-35680 6110 Stoneridge Mall Road Pleasanton CA 94588 9259519000 DAVID A. DUFFIELD TRUST U/T/A 7/14/88 10% Stockholder Common Morgan Stanley Smith Barney LLC Executive Financial Services 1 New York Plaza 8th Floor New York NY 10004 99613 18750154.99 196000000 09/23/2026 NASDAQ Common 12/27/2007 Private Placement Issuer N 99613 12/27/2007 Cash N 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588 Common 09/18/2026 94089 18318300.32 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588 Common 09/15/2026 96545 18563624.33 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588 Common 09/10/2026 100780 18708920.14 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588 Common 09/04/2026 90615 17954365.49 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588 Common 09/01/2026 94961 18924540.29 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588 Common 07/09/2026 107500 14699055.50 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588 Common 07/06/2026 107500 14538267.75 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588 Common 06/30/2026 107500 13119171.00 10b5-1 Sales for DAVID A DUFFIELD TRUST U/T/A 7/14/88 6110 Stoneridge Mall Road Pleasanton CA 94588 Common 06/25/2026 107500 12426602.25 09/23/2026 12/02/2025 /s/ David A. Duffield