X0508 4 2025-12-15 1 0001425287 Workhorse Group Inc. WKHS 0001928932 Miller Austin Scott C/O WORKHORSE GROUP INC. 3600 PARK 42 DRIVE, SUITE 160E SHARONVILLE OH 45241 1 0 0 0 0 Common Stock, $0.001 par value per share 2025-12-15 4 M 0 5051 0 A 5181 D Common Stock, $0.001 par value per share 2025-12-15 4 S 0 5051 6.51 D 130 D Restricted Stock Units 2025-12-15 4 M 0 5051 0 D 2026-02-18 2026-02-18 Common Stock, $0.001 par value per share 5051 0 D On June 17, 2024, Workhorse Group Inc. (the "Company") effected a 1-for-20 reverse split of the Company's common stock. On March 17, 2025, the Company effected a 1-for-12.5 reverse split of the Company's common stock. On December 8, 2025, the Company effected a 1-for-12 reverse split of the Company's common stock. The reverse stock splits resulted in a reduction in the number of shares held by the reporting person and proportional adjustments to the Company's outstanding equity awards. Accordingly, all amounts of securities reported in this Form 4 have been adjusted to reflect the foregoing reverse stock splits. Pursuant to an Agreement and Plan of Merger (the "Merger Agreement"), dated August 15, 2025, by and among the Company, Omaha Intermediate 2, Inc., Omaha Intermediate, Inc., Omaha Merger Subsidiary, Inc., and Motiv Power Systems, Inc., all of the Company's outstanding equity awards vested immediately prior to the effective time of the merger, with (to the extent applicable) performance deemed achieved at target. Represents Restricted Stock Units ("RSUs") granted by the Company to the reporting person on August 18, 2025. In accordance with the Merger Agreement, each RSU vested and settled in cash at the effective time of the merger based on the fair market value of the Company's common stock. /s/ Arthur McMahon, III, attorney-in-fact for Austin S. Miller 2025-12-15