Key facts
- This page summarizes William A. Franke's Form 4 filing for Frontier Group Holdings, Inc. (ULCC).
- 3 reported transactions and 4 derivative rows are listed below.
- Accepted by SEC: 18 May 2026, 16:15.
William A. Franke - 14 May 2026 Form 4 Insider Report for Frontier Group Holdings, Inc. (ULCC)
- Reporting relationship
- Director, Chair of the Board, 10%+ Owner
- Issuer ticker
- ULCC
- Reported as of
- 14 May 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 18 May 2026, 16:15:07 UTC
- Prior SEC filing
- 19 May 2025
- Source filing
- View source filing
- Reporting owner signature
- /s/ William A. Franke
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
William A. Franke filed Form 4 for Frontier Group Holdings, Inc. (ULCC) on 18 May 2026.
Change
- Previous filing in this sequence was filed on 19 May 2025.
- Current net transaction value: $0.
Research use
- This tells you what this filing adds before you inspect full transaction and derivative tables.
- You can trace every row back to the original SEC filing document.
Evidence
Filed on Form 4
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
Reporting Owners (2)
CIK 0000929613
Primary reporting owner
FRANKE WILLIAM A
- Relationship
- Director, Chair of the Board, 10%+ Owner
- Address
- C/O FRONTIER GROUP HOLDINGS, INC., 4545 AIRPORT WAY, DENVER
- Signature
- /s/ William A. Franke
- Signature date
- 18 May 2026
CIK 0001854279
Indigo Denver Management Company, LLC
- Relationship
- 10%+ Owner
- Address
- C/O INDIGO PARTNERS, 2525 EAST CAMELBACK ROAD, SUITE 900, PHOENIX
- Signature
- INDIGO DENVER MANAGEMENT COMPANY, LLC, by: /s/ William A. Franke, managing member
- Signature date
- 18 May 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
ULCC
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +34,230
- Change %
- +0.05%
- Price
- Shares after
- 67,362,528
- Date
- 14 May 2026
- Ownership
- Direct
- Footnotes
- F1
ULCC
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +34,230
- Change %
- +0.05%
- Price
- Shares after
- 67,362,528
- Date
- 14 May 2026
- Ownership
- Direct
- Footnotes
- F1
ULCC
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 31,975,180
- Date
- 14 May 2026
- Ownership
- By Indigo Denver Management Company, LLC
- Footnotes
- F2
ULCC
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 31,975,180
- Date
- 14 May 2026
- Ownership
- By Indigo Denver Management Company, LLC
- Footnotes
- F2
ULCC
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 116,827
- Date
- 14 May 2026
- Ownership
- By Indigo Partners LLC
ULCC
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 116,827
- Date
- 14 May 2026
- Ownership
- By Indigo Partners LLC
ULCC
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 82,449
- Date
- 14 May 2026
- Ownership
- By Spouse
ULCC
holding
Common Stock
No transaction description listed
- Transaction value
- Shares
- Change %
- Price
- Shares after
- 82,449
- Date
- 14 May 2026
- Ownership
- By Spouse
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
ULCC
transaction
Derivative
Restricted Stock Units
Options Exercise
- Transaction value
- Shares
- -34,230
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 14 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 34,230
- Exercise price
- Footnotes
- F1, F3
ULCC
transaction
Derivative
Restricted Stock Units
Options Exercise
- Transaction value
- Shares
- -34,230
- Change %
- -100%
- Price
- $0.000000*
- Shares after
- 0
- Date
- 14 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 34,230
- Exercise price
- Footnotes
- F1, F3
ULCC
transaction
Derivative
Restricted Stock Units
Award
- Transaction value
- Shares
- +32,990
- Change %
- Price
- $0.000000*
- Shares after
- 32,990
- Date
- 14 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 32,990
- Exercise price
- Footnotes
- F1, F4
ULCC
transaction
Derivative
Restricted Stock Units
Award
- Transaction value
- Shares
- +32,990
- Change %
- Price
- $0.000000*
- Shares after
- 32,990
- Date
- 14 May 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 32,990
- Exercise price
- Footnotes
- F1, F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 4 footnotes
Footnote F1
Each Restricted Stock Unit represents a contingent right to receive one share of Issuer Common Stock. The Restricted Stock Units have no expiration date.
Footnote F2
These shares are held directly by Indigo Denver Management Company, LLC. William A. Franke is the sole member of Indigo Denver Management Company, LLC, and as such, may be deemed to have voting and dispositive power over these shares. Mr. Franke disclaims beneficial ownership of these shares except to the extent of his pecuniary interest therein.
Footnote F3
The RSUs have fully vested as of May 14, 2026.
Footnote F4
The RSUs will vest in full on the earlier of May 14, 2027 or immediately prior to the next annual meeting of stockholders after the grant date, subject to continued service of the Reporting Person through the vesting date.