Form 8-K

8-K — Sky Harbour Group Corp

Accession: 0001437749-26-027321

Filed: 2026-08-12

Period: 2026-08-10

CIK: 0001823587

SIC: 6500 (REAL ESTATE)

Item: Entry into a Material Definitive Agreement

Item: Financial Statements and Exhibits

Documents

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EX-5.1 — EXHIBIT 5.1 (ex_1003747.htm)

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2026-08-10

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(d) OF THE

SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported) August 10, 2026

Sky Harbour Group Corporation

(Exact name of registrant as specified in its charter)

Delaware

001-39648

85-2732947

(State or other jurisdiction

of incorporation)

(Commission

File Number)

(IRS Employer

Identification No.)

136 Tower Road, Suite 205

Westchester County Airport

White Plains, NY

10604

(Address of principal executive offices)

(Zip Code)

(212) 554-5990

Registrant’s telephone number, including area code

(Former name or former address, if changed since last report.)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

☐

Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐

Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐

Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐

Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:

Title of each class

Trading

Symbol(s)

Name of each exchange on

which registered

Class A common stock, par value $0.0001 per share

SKYH

The New York Stock Exchange

Warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per share

SKYH WS

The New York Stock Exchange

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☐

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 1.01. 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 offering occurred on August 12, 2026. The Company received aggregate gross proceeds of $40.0 million from the offering, before deducting offering-related expenses. The Company intends to use the net proceeds for general corporate purposes.

In connection with the registered direct offering, the Company and its directors and executive officers and certain holders of more than 5.0% of its outstanding stock (the “Lock-Up Parties”) and the Investors have agreed that for a period of 90 days following the closing date, subject to certain exceptions, the Lock-Up Parties will not sell, pledge, or otherwise transfer or dispose of, directly or indirectly, any shares of Common Stock or securities convertible into or exchangeable or exercisable for any shares of Common Stock.

Substantially concurrently with the registered direct offering, Boston Omaha Corporation, a Delaware corporation (“BOC”), entered into certain Secondary Stock Purchase Agreements with certain investors, pursuant to which the investors agreed to purchase an aggregate of 360,000 shares of Common Stock from BOC at a price per share of $10.00 (the “Private Secondary Transactions”). The closings of the Private Secondary Transactions are expected to occur on or prior to August 14, 2026.

The Shares are being offered and sold pursuant to a shelf registration statement on Form S-3 (File No. 333-278275), filed with the Securities and Exchange Commission (“SEC”) on March 27, 2024, and declared effective by the SEC on April 10, 2024, and the accompanying base prospectus included therein, as supplemented by the prospectus supplement filed with the SEC on August 12, 2026. A copy of the opinion of Morrison & Foerster LLP with respect to the validity of the Shares is filed herewith as Exhibit 5.1.

Item 9.01. Financial Statements and Exhibits.

(d) Exhibits. The Exhibit Index set forth below is incorporated herein by reference.

EXHIBIT INDEX

Exhibit Number

Exhibit Title

5.1

Opinion of Morrison & Foerster LLP.

23.1

Consent of Morrison & Foerster LLP (included in Exhibit 5.1).

104

Cover Page Interactive Data File (embedded within the Inline XBRL document).

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: August 12, 2026

SKY HARBOUR GROUP CORPORATION

By:

/s/ Tal Keinan

Name:

Tal Keinan

Title:

Chief Executive Officer

EX-5.1 — EXHIBIT 5.1

EX-5.1

Filename: ex_1003747.htm · Sequence: 2

ex_1003747.htm

Exhibit 5.1

300 COLORADO STREET

SUITE 1800

AUSTIN, TX 78701

TELEPHONE: 512.617.0650

FACSIMILE: 737.910.0730

WWW.MOFO.COM

morrison & foerster llp

AMSTERDAM, AUSTIN, BERLIN, BOSTON, BRUSSELS, DENVER, HONG KONG, LONDON, LOS ANGELES, MIAMI, NEW YORK, PALO ALTO, SAN DIEGO, SAN FRANCISCO, SEATTLE, SHANGHAI, SINGAPORE, TOKYO, WASHINGTON, D.C.

August 12, 2026

Board of Directors

Sky Harbour Group Corporation

136 Tower Road, Suite 205

White Plains, NY 10604

Re: Prospectus Supplement

Ladies and Gentlemen:

We have acted as counsel to Sky Harbour Group Corporation, a Delaware corporation (the “Company”), in connection with the issuance of 4,000,000 shares (the “Shares”) of the Company’s Class A common stock, par value $0.0001 per share (the “Common Stock”), pursuant to (i) the registration statement on Form S-3 (File No. 333-278275) as filed with the Securities and Exchange Commission (the “Commission”) in accordance with the provisions of the Securities Act of 1933, as amended, and the rules and regulations of the Commission thereunder (collectively, the “Securities Act”), which was declared effective by the Commission on April 10, 2024 (together with the documents incorporated by reference therein, the “Registration Statement”), (ii) the base prospectus dated April 10, 2024 (together with the documents incorporated by reference therein, the “Base Prospectus”), (iii) the prospectus supplement dated August 12, 2026 (together with the documents incorporated by reference therein and the Base Prospectus, the “Prospectus”) and (iv) the Stock Purchase Agreement, dated as of August 10, 2026 (as amended, supplemented or otherwise modified from time to time in accordance with its terms, the “Purchase Agreement”), by and among the Company and the investors signatory thereto.

As counsel for the Company, we have examined originals or copies, certified or otherwise identified to our satisfaction, of such documents, corporate records, certificates of public officials and other instruments as we have deemed necessary for the purposes of rendering this opinion. In addition, we are familiar with the proceedings taken and proposed to be taken by the Company in connection with the issuance of the Shares. In our examination, we have assumed the genuineness of all signatures, the authenticity of all documents submitted to us as originals and the conformity with the originals of all documents submitted to us as copies. This opinion letter is given, and all statements herein are made, in the context of the foregoing.

Sky Harbour Group Corporation

August 12, 2026

Page Two

This opinion letter is based as to matters of law solely on the General Corporation Law of the State of Delaware as currently in effect. We express no opinion herein as to any other laws, statutes, ordinances, rules, or regulations.

Based upon the foregoing, we are of the opinion that the Shares have been duly authorized and, upon issuance and delivery in the manner contemplated by the Registration Statement, the Prospectus and the Purchase Agreement, will be validly issued, fully paid and nonassessable.

This opinion letter has been prepared for use in connection with the filing by the Company of a Current Report on Form 8-K, which Form 8-K will be incorporated by reference into the Registration Statement and Prospectus and may not be relied upon for any other purpose without our express written consent. No opinion may be implied or inferred beyond the opinion expressly stated. This opinion is given as of the date hereof, and we assume no obligation to advise you of any changes in applicable law or any facts or circumstances that come to our attention after the date hereof that may affect the opinion contained herein.

We consent to the use of this opinion as an exhibit to the above described Current Report on Form 8-K, and we consent to the reference of our name under the caption “Legal Matters” in the Prospectus Supplement. In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Securities Act.

Very truly yours,

/s/ Morrison & Foerster LLP

Morrison & Foerster LLP

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Aug. 10, 2026

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