[Form 4] Frontier Group Holdings, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Frontier Group Holdings, Inc. (ULCC) reporting person Howard M. Diamond, identified as an officer (EVP, Legal & Corporate Affairs), reported an insider sale on 09/05/2025. The Form 4 records a sale (Transaction Code S) of 35,401 shares of Common Stock at $5.50 per share. Following the reported transaction, the filing shows Mr. Diamond beneficially owns 74,195 shares. No derivative transactions are reported on this form. The form was signed by the reporting person on 09/09/2025.

Positive

• Transaction fully disclosed on Form 4 with date, quantity, and price provided
• No derivative transactions reported, simplifying the ownership picture

Negative

• Insider disposed of 35,401 shares, reducing direct beneficial ownership to 74,195 shares

Insights

Securities Analyst

TL;DR: Insider sale of 35,401 shares reduces holdings to 74,195; transaction disclosed on Form 4, no derivatives involved.

The filing shows a straightforward open-market sale reported under Rule 16 reporting requirements. The sale price of $5.50 and the post-transaction beneficial ownership (74,195 shares) are explicitly stated. There are no derivative instruments or complex transfers disclosed, and the form indicates it was filed by one reporting person and signed on 09/09/2025. This is a routine Section 16 disclosure of an insider disposition.

Corporate Governance Expert

TL;DR: Officer-level insider disposed of shares; disclosure appears complete and timely based on the form details.

The report identifies Howard M. Diamond as the reporting person and lists his title as EVP, Legal & Corporate Affairs. The Form 4 records a single non-derivative sale transaction on 09/05/2025 with clear quantities and price. No amendments, indemnities, or additional notes are present. From a governance perspective, the filing meets the basic transparency standard required for insider transactions.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Diamond Howard

(Last) (First) (Middle)

C/O FRONTIER GROUP HOLDINGS, INC.

4545 AIRPORT WAY

(Street)

DENVER CO 80239

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Frontier Group Holdings, Inc. [ ULCC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	EVP, Legal & Corporate Affairs

3. Date of Earliest Transaction (Month/Day/Year)
09/05/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	09/05/2025		S		35,401	D	$5.5	74,195	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

Remarks:

	/s/ Howard M. Diamond	09/09/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

What insider transaction did Howard M. Diamond report for ULCC?

He reported a sale of 35,401 shares of Frontier Group Holdings common stock on 09/05/2025 at $5.50 per share.

How many ULCC shares does the reporting person own after the transaction?

The Form 4 reports 74,195 shares beneficially owned following the reported sale.

Were any derivative securities reported on this Form 4 for ULCC?

No. The filing shows no derivative securities in Table II; only a non-derivative sale is reported.

When was the Form 4 signed and filed for this ULCC disclosure?

The reporting person signed the form on 09/09/2025, with the transaction dated 09/05/2025.

What is the reporting person’s role at Frontier Group Holdings (ULCC)?

The form identifies the reporting person as an officer with the title EVP, Legal & Corporate Affairs.