X0609 4 2026-05-12 0000775158 OSHKOSH CORP OSK 0001411587 Palmer Duncan false C/O OSHKOSH CORPORATION 1917 FOUR WHEEL DRIVE OSHKOSH WI 54902 1 0 0 0 1 Common Stock 2026-05-12 4 S 0 505 133.860 D 39684.070 D Shares were sold pursuant to a Rule 10b5-1 plan adopted on February 3, 2026, with the sale proceeds to be used to satisfy Mr. Palmer's estimated income tax obligations associated with the shares received on May 5, 2026. Ignacio A. Cortina, for Duncan J. Palmer 2026-05-13