REPUBLIC AIRWAYS HOLDINGS INC. (RJET): auditor change — Mesa Air Group replaces auditor Marcum with CBIZ after acquisition of attest business

(“ CBIZ ”) acquired the attest business of Marcum LLP (“ Marcum ”), the present independent registered public accounting firm of Mesa Air Group, Inc (the “ Company ”). As a result of the acquisition of the Marcum attestation business, on March 4, 2025, the Company was notified by Marcum that Marcum will resign as the Company’s independent registered public accounting firm effective immediately upon the filing of the Company’s Form 10-K for the fiscal year ended September 30, 2024. Concurrently with the Marcum notification, on March 4, 2025, the Company, with the approval of the Audit Committee of the Company’s Board of Directors (the “Board”), has engaged CBIZ as the Company’s independent registered public accounting firm for the fiscal year ending September 30, 2025. During the period April 12, 2024 through March 4, 2025, the date Marcum informed the Company of their resignation, there

Concurrently with the Marcum notification, on March 4, 2025, the Company, with the approval of the Audit Committee of the Company’s Board of Directors (the “Board”), has engaged CBIZ as the Company’s independent registered public accounting firm for the fiscal year ending September 30, 2025.