Frontier Group Holdings, Inc.

For the period ended Jun 30, 2026. Filed Jul 29, 2026.

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.

Jun 30, 2026 · Filed Jul 29, 2026

ULCC$8.35+12.4%Stored close · as of Nov 9, 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)†^	Sixth Amendment to the Amended and Restated Frontier Airlines, Inc. Credit Card Affinity Agreement, dated as of April 27, 2026, by and between Barclays Bank Delaware and Frontier Airlines, Inc.					X
10.1(b)†^	Seventh Amendment to the Amended and Restated Frontier Airlines, Inc. Credit Card Affinity Agreement, dated as of June 24, 2026, by and between Barclays Bank Delaware and Frontier Airlines, Inc.					X
10.1(c)†^	Aircraft Sale Agreement, dated June 30, 2026, by and between Frontier Airlines, Inc. and Avolon Leasing Ireland 3 Limited					X
10.1(d)†	Schedule of Aircraft Sale Agreements substantially identical in all material respects to the Aircraft Sale Agreement filed as Exhibit 10.1(c)					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.

† Certain portions of this document that constitute confidential information have been redacted in accordance with Regulation S-K, Item 601(b)(10).

^ Schedules to this document have been omitted in accordance with Regulation S-K, Item 601(a)(5).

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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.