Frontier Group Holdings, Inc.

For the period ended Sep 30, 2025. Filed Nov 5, 2025.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2025 · Filed Nov 5, 2025

ULCC$7.43+4.4%Stored close · as of Nov 6, 2026

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Contents

Item 6. Exhibits

Incorporated by Reference · Filed Herewith
Exhibit Number · Exhibit Description · Form · File Number · Date · Number
3.1	Amended and Restated Certificate of Incorporation of Frontier Group Holdings, Inc.	8-K	001-40304	5/16/2025	3.1
3.2	Amended and Restated Bylaws of Frontier Group Holdings, Inc.	8-K	001-40304	7/25/2024	3.1
4.1	Form of Common Stock Certificate.	S-1	333-254004	3/8/2021	4.2
4.2	Form of Common Stock Warrant.	10-Q	001-40304	8/8/2024	4.2
10.1(a)†^	PW1100G-JM Engine Purchase and Support Agreement and Fleet Management Program, dated as of July 24, 2025, by and between International Aero Engines, LLC and Frontier Airlines, Inc.					X
10.1(b)†^	Amendment No. 2, dated as of July 24, 2025, to PW1100G-JM Engine Purchase and Support Agreement by and between International Aero Engines, LLC and Frontier Airlines, Inc.					X
10.1(c)†^	PW1100G-JM Spare Engine and Engine Thrust Intermix Agreement, dated as of July 24, 2025, by and between International Aero Engines, LLC and Frontier Airlines, Inc.					X

10.2(a)†	Amendment No. 1 to Rate per Flight Hour Agreement, dated as of September 12, 2025, by and between CFM International Inc. and Frontier Airlines, Inc.	X
10.2(b)†	Amendment No. 4 to Rate per Flight Hour Agreement, dated as of September 12, 2025, by and between CFM International Inc. and Frontier Airlines, Inc.	X
10.3#	Employment Letter, dated as of August 28, 2025, by and between Frontier Airlines, Inc. and Jeffrey Mathew	X
31.1	Certification of the Chief Executive Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.	X
31.2	Certification of the Chief Financial Officer pursuant to Exchange Act Rules 13a-14(a) and 15d-14(a), as adopted pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.	X
32.1*	Certification of the Chief Executive Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.	X
32.2*	Certification of the Chief Financial Officer pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.	X
101.INS	Inline XBRL Instance Document – The instance document does not appear in the interactive data file because its XBRL tags are embedded within the Inline XBRL document.	X
101.SCH	Inline XBRL Taxonomy Extension Schema Document.	X
101.CAL	Inline XBRL Taxonomy Extension Calculation Linkbase Document.	X
101.DEF	Inline XBRL Taxonomy Extension Definition Linkbase Document.	X
101.LAB	Inline XBRL Taxonomy Extension Labels Linkbase Document.	X
101.PRE	Inline XBRL Taxonomy Extension Presentation Linkbase Document.	X
104	Cover Page Interactive Data File (formatted as inline XBRL and contained in Exhibit 101).	X

The certifications furnished in Exhibits 32.1 and 32.2 hereto are deemed to accompany this Quarterly Report on Form 10-Q and are not deemed “filed” for purposes of Section 18 of the Exchange Act, or otherwise subject to the liability of that section, nor shall they be deemed incorporated by reference into any filing under the Securities Act or the Exchange Act, irrespective of any general incorporation language contained in such filing.

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The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.