Arcosa shareholders elect all 9 director nominees, approve say-on-pay, ratify EY as auditor

Proposal 2 – Advisory Vote to Approve Named Executive Officer Compensation The shareholders approved, on an advisory basis, the compensation of the Company’s named executive officers as disclosed in the proxy statement dated March 31, 2026, including the Compensation Discussion and Analysis, the compensation tables, and the narrative discussion related thereto, by the following vote: For Against Abstentions Broker Non-Votes 43,665,451 521,917 99,859 2,586,744

Proposal 1 – Election of Directors The shareholders elected the following Directors to serve a term expiring at the 2027 annual meeting of shareholders: Nominee For Against Abstentions Broker Non-Votes Joseph Alvarado 44,059,859 211,888 15,480 2,586,744 Rhys J. Best 44,091,957 179,937 15,333 2,586,744 Antonio Carrillo 44,003,636 269,020 14,571 2,586,744 Jeffrey A. Craig 44,130,284 141,788 15,155 2,586,744 Steven J. Demetriou 40,843,391 3,427,289 16,547 2,586,744 John W. Lindsay 44,158,115 114,493 14,619 2,586,744 Kimberly S. Lubel 44,074,968 191,544 20,715 2,586,744 Julie A. Piggott 44,077,761 185,877 23,589 2,586,744 Melanie M. Trent 41,980,438 2,290,040 16,749 2,586,744

Proposal 3 – Ratification of Appointment of Independent Registered Public Accounting Firm for the Year Ending December 31, 2026 The shareholders ratified the appointment of Ernst & Young LLP as the Company’s independent registered public accounting firm for the year ending December 31, 2026, by the following vote: For Against Abstentions 46,578,461 264,353 31,157