Sun Country Airlines Holdings, Inc. SEC Filings

William Trousdale, an officer of Sun Country Airlines Holdings, Inc. (SNCY), reported a sale of 1,853 shares of the company's common stock on 09/12/2025 at a reported price of $13.7629 per share. After the sale, Mr. Trousdale beneficially owned 25,140 shares. The Form 4 was signed by an attorney-in-fact on 09/15/2025. The filing discloses a single non-derivative sale and shows the reporting person’s role as an officer (SVP, VP FP&A, Treasurer).

Erin Rose Neale, listed as SVP, Chief Legal Officer and a director at Sun Country Airlines Holdings, Inc. (SNCY), reported a sale of 3,515 shares of common stock on 09/12/2025 at a price of $13.95 per share. After the transaction the reporting person beneficially owned 30,369 shares. The Form 4 states the sales were effected pursuant to a Rule 10b5-1 trading plan adopted on 09/12/2024. The filing is signed by Erin Rose Neale on 09/15/2025.

Form 144 notice filed for Sun Country Airlines Holdings, Inc. (SNCY). The filer reports a proposed sale of 5,000 common shares through Fidelity Brokerage Services with an aggregate market value of $65,904.41, and lists the approximate date of sale as 09/10/2025 on NASDAQ. The filing shows the securities were acquired by an option granted (original grant date noted as 11/21/2018) and the planned sale payment method is cash. The form also discloses three sales by John M. Gyurci within the past three months totaling 4,163 shares for gross proceeds of $49,197.44. The filer certifies no undisclosed material adverse information is known.

Daniel Torque Zubeck, who serves as SVP & Chief Financial Officer and a director of Sun Country Airlines Holdings, Inc. (SNCY), filed an initial Form 3 reporting the 09/02/2025 event date. The filing states no securities are beneficially owned by Mr. Zubeck at the time of the report. The form was signed by an attorney-in-fact on behalf of Mr. Zubeck on 09/09/2025. This is an initial Section 16 filing and contains no holdings, derivative positions, or amendments.

Insider sale by Sun Country Airlines (SNCY) officer. John Gyurci, Chief Accounting Officer & VP, Finance, reported a sale of 704 shares of Sun Country common stock on 09/03/2025 at a price of $13.33 per share. After the transaction he beneficially owned 25,109 shares, held directly. The Form 4 was submitted by counsel on 09/05/2025. The filing shows a single non-derivative disposition and contains no additional explanatory details.

Form 144 notice for Sun Country Airlines Holdings, Inc. (SNCY) reports a proposed sale of 704 common shares through Fidelity Brokerage Services LLC with an aggregate market value of $9,384.32. The shares are scheduled for sale on 09/03/2025 on NASDAQ. The 704 shares were acquired by restricted stock vesting as 8 shares on 03/31/2025 and 696 shares on 06/30/2025, with the acquisition characterized as compensation. The filing also discloses prior sales by John M. Gyurci of 3,150 shares on 06/12/2025 (gross proceeds $36,193.50) and 309 shares on 07/01/2025 (gross proceeds $3,619.62). The filer certifies no undisclosed material adverse information and includes the required representations for Rule 144 compliance.

Zimmer Partners and affiliated entities report a shared beneficial ownership position of 2,225,900 shares in Sun Country Airlines Holdings, Inc. This stake represents approximately 4.2% of Sun Country's outstanding common stock, based on an outstanding share count of 53,316,378 as of 06/30/2025. The Reporting Persons—Zimmer Partners, LP; Zimmer Financial Services Group LLC; Zimmer Partners GP, LLC; and Stuart J. Zimmer—hold shared voting and shared dispositive power over the shares and report no sole voting or dispositive power. The filing is made on Schedule 13G/A and includes a certification that the securities were acquired and are held in the ordinary course of business and not for the purpose of changing or influencing control.

Frontier Capital Management Co., LLC filed a Schedule 13G reporting it beneficially owns 3,533,617 shares of Sun Country Airlines Holdings, Inc. common stock (CUSIP 866683105), representing 6.64% of the class as of the reporting event date 06/30/2025. The filing shows Frontier Capital has no sole voting or dispositive power, shared voting power of 1,632,086 shares, and shared dispositive power over all 3,533,617 shares. The reporting person is identified as an investment adviser organized in Delaware with a principal office at 99 Summer Street, Boston, MA.

The filing incorporates a certification that the securities are held in the ordinary course of business and were not acquired to change or influence control of the issuer. Other procedural items in the statement are marked not applicable.

Sun Country Airlines Holdings appointed D. Torque Zubeck as Senior Vice President and Chief Financial Officer, effective September 2, 2025, replacing interim CFO Bill Trousdale who will step down September 1, 2025. Mr. Zubeck, age 55, brings over 30 years of finance experience, including 22+ years in airline leadership, most recently serving as CFO of Mesa Airlines (March 2021 to September 2023) and 20 years in roles at Alaska Airlines where he led the Virgin America integration.

His employment letter provides an annual base salary of $350,000, eligibility for the Companys annual cash bonus program, a sign-on equity grant with a grant-date value of $800,000 in time-based restricted stock units vesting annually over three years, eligibility for annual equity awards and standard senior executive benefits. If terminated without "Cause," he is entitled to continued base salary and healthcare for 12 months subject to execution of a release and compliance with restrictive covenants. The full employment letter is filed as Exhibit 10.1.