William McGloin, currently Frontier's Vice President, Controller, has been appointed Chief Accounting Officer and Controller, effective June 24, 2022, with the roles of Chief Accounting Officer and Controller being combined. Mr. McGloin, 52, has served at Frontier for eight years, most recently as Frontier's Vice President, Controller, since 2018 and as Vice President, Assistant Controller since 2014. Mr. McGloin is a Certified Public Accountant and worked at KPMG LLP prior to joining Frontier.

There are no arrangements or understandings between Mr. McGloin and any other persons in connection with his appointment. There are no family relationships between Mr. McGloin and any director or executive officer of the Company, and Mr. McGloin is not a party to any transaction required to be disclosed pursuant to Item 404(a) of Regulation S-K. Donald W. Daniels, Frontier's current Senior Vice President and Chief Accounting Officer, will be leaving Frontier to pursue other opportunities following a transition period. In connection with his separation, Mr. Daniels and Frontier will enter into a Release Agreement under which Mr. Daniels will be entitled to receive payment and benefits consistent with Frontier's severance policy.