Other Events. As previously disclosed, on August 21, 2026, Sky Harbour Group Corporation, a Delaware corporation (the “Company”), entered into a Stock Purchase Agreement (the “Stock Purchase Agreement”) with M-COR Capital LLC, a Delaware limited liability company (the “Investor”), pursuant to which the Company agreed to sell 1,000,000 shares (the “Shares”) of its Class A common stock, $0.0001 par value per share, to the Investor in a registered direct offering at a purchase price of $10.00 pe…

Other Events. On August 21, 2026, the Company entered into a Stock Purchase Agreement (the “Stock Purchase Agreement”) with M-COR Capital LLC, a Delaware limited liability company (the “Investor”), pursuant to which the Company agreed to sell 1,000,000 shares of its Class A common stock, $0.0001 par value per share (the “Common Stock”), to the Investor in a registered direct offering at a purchase price of $10.00 per share. The Company expects the offering to close on or before August 26, 202…

and in the Investor Presentation shall not be incorporated by reference in any filing under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in any such filing. Cautionary Statement Regarding Forward-Looking Statements This Current Report on Form 8-K includes “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995. Certain of these forward-looking statements c…

Entry into a Material Definitive Agreement. On August 10, 2026, Sky Harbour Group Corporation, a Delaware corporation (the “Company”), entered into a Stock Purchase Agreement with certain investors (the “Investors”), pursuant to which the Company agreed to sell an aggregate of 4,000,000 shares (the “Shares”) of its Class A common stock, $0.0001 par value per share (the “Common Stock”), to the Investors in a registered direct offering at a purchase price of $10.00 per share. The closing of the…

by reference. The furnishing of the Press Release and Investor Presentation is not an admission as to the materiality of any information therein. The information contained in the Press Release and Investor Presentation is summary information that is intended to be considered in the context of more complete information included in the Company’s filings with the U.S. Securities and Exchange Commission (the “SEC”) and other public announcements that the Company has made and may make from time to…

Entry into a Material Definitive Agreement Second Amendment to Draw Down Note Purchase and Continuing Covenant Agreement On June 29, 2026, Sky Harbour Capital II LLC (“SH Capital II”), an indirect, wholly-owned subsidiary of Sky Harbour Group Corporation (the “Company”), entered into an amendment (the “Second Amendment”) to its Draw Down Note Purchase And Continuing Covenant Agreement (the “Term Loan Facility”), among SH Capital II, the other borrowers party thereto (the “Borrowers”), the len…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

The filing describes an amendment to the Incentive Award Plan, not a management change.

by reference. The furnishing of the Press Release and Investor Presentation is not an admission as to the materiality of any information therein. The information contained in the Press Release and Investor Presentation is summary information that is intended to be considered in the context of more complete information included in the Company’s filings with the U.S. Securities and Exchange Commission (the “SEC”) and other public announcements that the Company has made and may make from time to…

by reference. The furnishing of the Press Release and Investor Presentation is not an admission as to the materiality of any information therein. The information contained in the Press Release and Investor Presentation is summary information that is intended to be considered in the context of more complete information included in the Company’s filings with the U.S. Securities and Exchange Commission (the “SEC”) and other public announcements that the Company has made and may make from time to…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

Entry into a Material Definitive Agreement On February 12, 2026, Sky Harbour Capital III LLC (the “Borrower”), an indirect, wholly-owned subsidiary of Sky Harbour Group Corporation (the “Company”), completed a $150 million financing through the issuance of Revenue Bonds (Sky Harbour Capital III LLC Aviation Facilities Project), Series 2026 (the “Series 2026 Bonds”). The Series 2026 Bonds were issued by the Public Finance Authority of Wisconsin, a multi-jurisdictional conduit issuer (the “Issu…

Other Events. As previously disclosed, on January 27, 2026, Sky Harbour LLC, a subsidiary of Sky Harbour Group Corporation (the “Company”), issued a non-convertible, unsecured promissory note to YA II PN, Ltd., a Cayman Islands exempt limited company, or its registered assigns (“Yorkville”), in the aggregate principal amount of $10 million (the “January 2026 Yorkville Promissory Note”). On February 3, 2026, in connection with and pursuant to the January 2026 Yorkville Promissory Note, the Com…

and the Press Release shall not be incorporated by reference in any filing under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in any such filing. Cautionary Statement Regarding Forward-Looking Statements This Current Report on Form 8-K includes “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995. Certain of these forward-looking statements can be ident…

and the Press Release shall not be incorporated by reference in any filing under the Securities Act or the Exchange Act, except as shall be expressly set forth by specific reference in any such filing. Cautionary Statement Regarding Forward-Looking Statements This Current Report on Form 8-K includes “forward-looking statements” within the meaning of the safe harbor provisions of the U.S. Private Securities Litigation Reform Act of 1995. Certain of these forward-looking statements can be ident…

Entry into a Material Definitive Agreement First Amendment to Draw Down Note Purchase Agreement and Holdco Guaranty Agreement On January 8, 2026, Sky Harbour Capital II LLC (“SH Capital II”), a wholly-owned subsidiary of Sky Harbour Group Corporation (the “Company”), entered into an amendment (the “Amendment”) to its Draw Down Note Purchase And Continuing Covenant Agreement (the “Credit Agreement”), among SH Capital II, the other borrowers party thereto (the “Borrowers”), the lenders party th…

Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant. The information set forth under

Director — Walter Jackson: Mr. Walter Jackson resigned from the Board, and Andrew Jody Gessow was appointed to succeed him.

Other Events. On December 8, 2025, Sky Harbour LLC (the “Borrower”), a subsidiary of Sky Harbour Group Corporation (the “Company”) issued a non-convertible, unsecured promissory note to YA II PN, Ltd., a Cayman Islands exempt limited company, or its registered assigns (“Yorkville”), in the aggregate principal amount of $15 million (the “Yorkville Promissory Note”). The issue price for the Yorkville Promissory Note was 100% of the aggregate principal amount thereof. The Yorkville Promissory No…

by reference. The furnishing of the Press Release and Investor Presentation is not an admission as to the materiality of any information therein. The information contained in the Press Release and Investor Presentation is summary information that is intended to be considered in the context of more complete information included in the Company’s filings with the U.S. Securities and Exchange Commission (the “SEC”) and other public announcements that the Company has made and may make from time to…

Entry into a Material Definitive Agreement Draw Down Note Purchase and Continuing Covenant Agreement On September 4, 2025, Sky Harbour Capital II LLC (“SH Capital II”), a wholly-owned subsidiary of Sky Harbour Group Corporation (the “Company”), entered into a Draw Down Note Purchase And Continuing Covenant Agreement (the “Credit Agreement”), among SH Capital II, the other borrowers party thereto, the lenders party thereto (the “Lenders”) and JPMorgan Chase Bank, N.A., as administrative agent,…

SIGNATURE Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. Dated: September 10, 2025 SKY HARBOUR GROUP CORPORATION By: /s/ Tal Keinan Name: Tal Keinan Title: Chief Executive Officer

Chief Operating Officer — Willard Whitesell: Mr. Whitesell stepped down from his position as Chief Operating Officer.

by reference. The furnishing of the Press Release and Investor Presentation is not an admission as to the materiality of any information therein. The information contained in the Press Release and Investor Presentation is summary information that is intended to be considered in the context of more complete information included in the Company’s filings with the U.S. Securities and Exchange Commission (the “SEC”) and other public announcements that the Company has made and may make from time to…

by reference. The furnishing of the Press Release and Investor Presentation is not an admission as to the materiality of any information therein. The information contained in the Press Release and Investor Presentation is summary information that is intended to be considered in the context of more complete information included in the Company’s filings with the U.S. Securities and Exchange Commission (the “SEC”) and other public announcements that the Company has made and may make from time to…