Sun Country Airlines Holdings, Inc. 8-K

What Happened
Sun Country Airlines Holdings, Inc. announced that it entered into an Agreement and Plan of Merger with Allegiant Travel Company on January 11, 2026. The transaction is structured as a two-step merger: Mirage Merger Sub, Inc. will merge into Sun Country (first merger), leaving Sun Country as a direct wholly owned Allegiant subsidiary, followed by Sun Country merging into Sawdust Merger Sub, LLC (second merger), with Sawdust surviving as an Allegiant subsidiary. On March 16, 2026, the companies issued a joint press release stating the statutory waiting period under the Hart‑Scott‑Rodino (HSR) Act was terminated early — a key regulatory milestone.

Key Details

• Merger Agreement dated: January 11, 2026.
• HSR waiting period: Early termination announced March 16, 2026.
• Transaction structure: Two-step merger via Allegiant subsidiaries (Mirage Merger Sub, Inc. and Sawdust Merger Sub, LLC).
• Next filings: Allegiant will file a Form S-4 registration statement and a joint proxy statement/prospectus for stockholder approvals.

Why It Matters
The HSR waiting-period termination clears an important antitrust procedural hurdle and moves the deal closer to closing, but the transaction still requires other regulatory approvals and stockholder consents described in the parties’ filings. For investors, this means Sun Country is on a clearer path to becoming a wholly owned Allegiant subsidiary pending the remaining approvals and the upcoming S-4/proxy process, which will provide details on consideration and timing. The companies’ risk disclosures also note potential impacts from integration, regulatory conditions, and other uncertainties that could affect expected benefits.