Frontier Group Holdings, Inc. SEC Filings

Frontier Group Holdings (ULCC) reported an insider equity update for its SVP & CFO, Mark C. Mitchell. On October 16, 2025, 43,403 Restricted Stock Units settled into common stock (Code M). The issuer withheld 18,988 shares at $4.42 to cover taxes (Code F), which does not represent a sale by the insider.

Following these transactions, Mitchell directly owned 136,501 shares. The filing notes that 43,403 RSUs remain outstanding and are scheduled to fully vest on October 16, 2026; each RSU equals one share and has no expiration date.

The filing is an initial Form 3 for Frontier Group Holdings, Inc. (ULCC) reporting by Mathew Jeffrey, who is listed as an officer (SVP, Chief Information Officer). The event date is 09/22/2025. The form states no securities are beneficially owned and includes a Power of Attorney (Exhibit 24). The form is signed by an attorney-in-fact on 10/02/2025.

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.

Form 144 notice for Frontier Group Holdings, Inc. (ULCC) reports a proposed sale of 3,800 common shares through UBS Financial Services on 09/09/2025 with an aggregate market value of $20,259.70. The shares were acquired as RSUs granted by Frontier Group Holdings Inc on 01/08/2025. The filing lists 228,155,458 shares outstanding for the class. The filer also reports a prior sale by Alexandre Clerc of 5,485 shares on 08/26/2025 generating $25,126 in gross proceeds. The notice includes the standard representation that the seller is not aware of undisclosed material adverse information.

Frontier Group Holdings, Inc. (ULCC) filing reports a proposed sale under Rule 144 of 35,401 common shares through UBS Financial Services with an aggregate market value of $194,705.50. The shares represent part of a holding of 228,155,458 outstanding shares and were acquired as restricted stock units on 10/25/2024 from the issuer. The filer also reported recent sales totaling 57,809 common shares on 09/02/2025 and 09/03/2025 with gross proceeds of $149,268 and $182,712 respectively. The notice includes the signer’s representation that they are not aware of any undisclosed material adverse information about the issuer.

Steve Schuller, Senior Vice President of Human Resources at Frontier Group Holdings, Inc. (ticker ULCC), reported a sale of 10,000 shares of Common Stock on 09/02/2025 at a price of $6.00 per share. The Form 4 shows the transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on May 19, 2024.

After the reported sale, the filing lists 64,330 shares beneficially owned by Mr. Schuller on a direct basis. The Form 4 was signed by an attorney-in-fact and filed on 09/04/2025.

Robert J. Genise, a director of Frontier Group Holdings, Inc. (ULCC), sold 30,000 shares of the company’s common stock on 09/02/2025 at a weighted average price of $5.5174 per share (sales ranged $5.51–$5.53). After the reported transactions, the reporting person beneficially owned 330,534 shares. The Form 4 indicates the sale was reported on a single line and was signed by an attorney-in-fact for the reporting person.

Howard M. Diamond, Executive Vice President, Legal & Corporate Affairs of Frontier Group Holdings, Inc. (ULCC), reported two stock sale transactions on Form 4. On 09/02/2025 he disposed of 26,306 shares of common stock at a weighted-average price of $5.6745. On 09/03/2025 he disposed of 31,503 shares at $5.80. After these transactions the reporting person beneficially owned 109,596 shares. The Form 4 states the 09/02/2025 price is a weighted average for multiple trades that ranged from $5.63 to $5.77, and the reporter offered to provide trade-level details on request.

Barry L. Biffle, who serves as CEO and a director of Frontier Group Holdings, Inc. (ticker ULCC), reported multiple open-market sales of the issuer's common stock on 09/02/2025. The Form 4 shows a sale of 423,882 shares at a weighted average price of $5.6283, after which Mr. Biffle is reported to directly beneficially own 800,000 shares. Separate entries show sales of 48,949 shares at a weighted average price of $5.6329 (held indirectly in a family trust) and 158,975 shares at a weighted average price of $5.5807 (held indirectly by spouse), each sold in multiple transactions across disclosed price ranges. The filer disclaims beneficial ownership of the trust-held shares. The Form is signed by an attorney-in-fact for Mr. Biffle on 09/04/2025.