On October 6, 2026, Vertical Aerospace Group Ltd. ("VAGL"), a wholly-owned subsidiary of Vertical Aerospace Ltd. (the "Company"), filed a patent infringement counterclaim against Archer Aviation Inc. ("Archer Aviation") in the U.S. District Court for the Eastern District of Texas, alleging that Archer Aviation’s electric vertical take-off and landing ("eVTOL") Midnight aircraft infringes one or more claims of VAGL’s U.S. Patent No. 12,747,027 (the "Counterclaim"). VAGL filed the Counterclaim in the lawsuit that Archer Aviation brought against the Company and VAGL on February 23, 2026 (Archer Aviation Inc. v. Vertical Aerospace Ltd. & Vertical Aerospace Group Ltd., Civil Action No. 2:26-cv-00149-JRG).

In its Counterclaim, VAGL seeks, among other things, injunctive relief to prevent further infringement as well as monetary damages.