Notice of Proposed Sale · 144

Frontier Group Holdings, Inc.

ULCCNASDAQEQUITYCurrent

Notice of Proposed Sale

Filed Aug 4, 2026Accepted Aug 4, 2026, 3:46 PM EDTFiling CIK 1853409Accession 0001969223-26-000838

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Structured filing — 144

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Notice of proposed sale. The proposed amounts below do not establish that a sale occurred.

Proposed-sale notice

Issuer: FRONTIER GROUP HOLDINGS, INC.
Issuer CIK: 0001670076
SEC file number: 001-40304
Phone: 720-374-4200
Person for whose account securities are to be sold: TREVOR STEDKE
Relationships to issuer: Officer
Street: 4545 AIRPORT WAY
City: DENVER
State / country code: CO
Postal code: 80239

Securities proposed for sale

Securities proposed for sale · 1 reported row
Security	Proposed units	Aggregate market value	Units outstanding	Approximate sale date	Exchange	Broker / market maker
common stock	167,277	1,334,458	230,215,771	08/04/2026	NASDAQ	UBS Financial Services Inc

Broker / market maker — proposed row 1, entry 1

Name: UBS Financial Services Inc
Street: 1000 Harbor Blvd
Street (continued): 3rd Floor
City: Weehawken
State / country code: NJ
Postal code: 07086

Acquisition of securities to be sold

Acquisition of securities to be sold · 17 reported rows
Security	Acquired	Nature of acquisition	Acquired from	Amount acquired	Gift transaction	Payment date	Nature of payment
common stock	02/03/2023	RSU	Frontier Group Holdings, Inc.	8,205	N	02/03/2023	N/A
common stock	02/03/2024	RSU	Frontier Group Holdings, Inc.	9,554	N	02/03/2024	N/A
common stock	02/03/2025	RSU	Frontier Group Holdings, Inc.	9,554	N	02/03/2025	N/A
common stock	02/06/2026	RSU	Frontier Group Holdings, Inc.	8,112	N	02/06/2026	N/A
common stock	02/08/2024	RSU	Frontier Group Holdings, Inc.	8,732	N	02/08/2024	N/A
common stock	02/08/2025	RSU	Frontier Group Holdings, Inc.	8,732	N	02/08/2025	N/A
common stock	02/08/2026	RSU	Frontier Group Holdings, Inc.	6,894	N	02/08/2026	N/A
common stock	02/18/2022	RSU	Frontier Group Holdings, Inc.	12,102	N	02/18/2022	N/A
common stock	02/19/2021	RSU	Frontier Group Holdings, Inc.	15,314	N	02/19/2021	N/A
common stock	02/19/2023	RSU	Frontier Group Holdings, Inc.	12,127	N	02/19/2023	N/A
common stock	02/22/2022	RSU	Frontier Group Holdings, Inc.	7,426	N	02/22/2022	N/A
common stock	02/23/2023	RSU	Frontier Group Holdings, Inc.	7,446	N	02/23/2023	N/A
common stock	02/23/2024	RSU	Frontier Group Holdings, Inc.	9,432	N	02/23/2024	N/A
common stock	04/08/2022	RSU	Frontier Group Holdings, Inc.	10,228	N	04/08/2022	N/A
common stock	04/09/2020	RSU	Frontier Group Holdings, Inc.	12,920	N	04/09/2020	N/A
common stock	04/09/2021	RSU	Frontier Group Holdings, Inc.	10,244	N	04/09/2021	N/A
common stock	04/09/2023	RSU	Frontier Group Holdings, Inc.	10,255	N	04/09/2023	N/A

Sales reported in the preceding three months

Sales reported in the preceding three months · 1 reported row
Seller	Security	Sale date	Amount sold	Gross proceeds
Trevor Stedke	common stock	05/07/2026	83,110	449,619

Seller — prior-sale row 1, entry 1

Name: Trevor Stedke
Street: 4545 Airport Way
City: Denver
State / country code: CO
Postal code: 80239

Prior-sale reporting

Nothing to report for the preceding three months: N

Notice signature

Notice date: 08/04/2026
Signed: /s/JOSEPH CASSIDY, for UBS Financial Services Inc, as attorney-in-fact for TREVOR STEDKE

Company context

Frontier Airlines, Inc. (Nasdaq: ULCC) is a value-focused airline operating one of the youngest and most fuel-efficient fleets in the United States. With a growing network and continued investment in product upgrades, including the introduction of Starlink, the fastest Wi-Fi in the sky, first-class seating and enhanced loyalty benefits, Frontier is giving customers more comfort, flexibility, and rewards while keeping fares low.

Current securities

ULCCNASDAQ · EQUITY · Current

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