Sun Country Airlines Holdings, Inc. 8-K

What Happened
Sun Country Airlines Holdings, Inc. (Sun Country) filed an 8-K reporting that, on April 15, 2026, Allegiant Travel Company and Sun Country announced the U.S. Department of Transportation (DOT) granted the interim exemption they had jointly requested in connection with their proposed merger. The parties signed an Agreement and Plan of Merger on January 11, 2026 establishing a two-step merger structure (a Merger Sub 1 into Sun Country, then Sun Country into Merger Sub 2) under which Allegiant will acquire Sun Country. A press release announcing the DOT action is attached to the 8-K as Exhibit 99.1.

Key Details

• Merger Agreement executed January 11, 2026 between Sun Country and Allegiant (with two Allegiant merger subsidiaries: Mirage Merger Sub, Inc. and Sawdust Merger Sub, LLC).
• DOT granted the requested interim exemption on April 15, 2026 (announced jointly by Allegiant and Sun Country).
• Allegiant’s Registration Statement (including prospectus) and the Definitive Joint Proxy Statement/Prospectus were declared effective and filed March 31, 2026; the registration covers Allegiant common stock to be issued in the transaction.
• The mergers remain subject to additional conditions, including required DOT approvals, stockholder approvals and other closing conditions.

Why It Matters
The DOT interim exemption is a material regulatory milestone that advances the timetable for the proposed acquisition by Allegiant, but it is not the final approval needed to close the deal. The transaction still depends on further regulatory sign-offs, stockholder votes and other conditions. Investors should review the Registration Statement and Definitive Joint Proxy Statement/Prospectus (filed March 31, 2026) for full details, including the structure of the consideration (Allegiant stock issuance) and the risk factors the companies disclose.