Boston Omaha Corp (SKYH) reports 360,000-share sale and large remaining stake

Rhea-AI Filing Summary

Boston Omaha Corporation, a ten percent owner of Sky Harbour Group Corp, reported a sale of 360,000 shares of Class A common stock on 2026-08-11 at $10.00 per share in an open-market or private transaction. Following this sale, Boston Omaha Corporation directly holds 8,306,163 shares of Sky Harbour Class A common stock.

In addition, United Casualty & Surety Insurance Company, a wholly owned subsidiary of Boston Omaha Corporation, holds 2,673,831 shares of Class A common stock, reported as indirect ownership. Boston Omaha Corporation also continues to own warrants to purchase 7,719,779 shares of Class A common stock.

Insider Trade Summary

Net Seller: 360,000 shares

Net Sell 2 txns

Insider BOSTON OMAHA Corp

Role 10% Owner

Sold 360,000 shs ($3.60M)

Type	Security	Shares	Price	Value
Sale	Class A common stock, par value $0.001 per share F1	360,000	$10.00	$3.60M
holding	Class A common stock, par value $0.001 per share F1	--	--	--

Holdings After Transaction: Class A common stock, par value $0.001 per share — 8,306,163 shares (Direct); Class A common stock, par value $0.001 per share — 2,673,831 shares (Indirect, See Footnote 1)

Footnotes (1)

1. F1. All of the shares of Class A common stock sold as reported on this Form 4 were sold by Boston Omaha Corporation. As of the date of this report, Boston Omaha Corporation now owns 8,306,163 shares of the Class A common stock of Sky Harbour Group Corporation and United Casualty & Surety Insurance Company, a wholly-owned subsidiary of Boston Omaha Corporation, owns an additional 2,673,831 shares of the Class A common stock. Boston Omaha Corporation continues to own warrants to purchase 7,719,779 shares of Class A common stock of Sky Harbour Group Corporation.

Key Figures

Shares sold: 360,000 shares Sale price: $10.00 per share Direct holdings after sale: 8,306,163 shares +2 more

5 metrics

Shares sold 360,000 shares Class A common stock sale on 2026-08-11

Sale price $10.00 per share Price for 360,000 Class A shares sold

Direct holdings after sale 8,306,163 shares Boston Omaha Corporation direct Class A ownership post-transaction

Indirect holdings 2,673,831 shares Class A shares held by United Casualty & Surety Insurance Company

Warrants held 7,719,779 shares Warrants to purchase Sky Harbour Class A common stock

Key Terms

ten percent owner, indirect ownership, warrants

3 terms

ten percent owner regulatory

"Boston Omaha Corporation is reported as a ten percent owner."

indirect ownership financial

"United Casualty & Surety Insurance Company holds shares as indirect ownership."

warrants financial

"Boston Omaha Corporation continues to own warrants to purchase shares."

Warrants are special documents that give you the right to buy a company's stock at a set price before a certain date. They are often used as a way for companies to attract investors or raise money, and their value can increase if the company's stock price goes up.

FAQ

What insider transaction did Boston Omaha Corporation report for Sky Harbour Group Corp (SKYH)?

Boston Omaha Corporation reported a sale of 360,000 shares of Sky Harbour Class A common stock on 2026-08-11 at $10.00 per share, characterized as a sale in an open-market or private transaction.

How many Sky Harbour (SKYH) shares does Boston Omaha Corporation own after this Form 4 transaction?

After the reported sale, Boston Omaha Corporation directly owns 8,306,163 shares of Sky Harbour Class A common stock, according to the filing’s post-transaction ownership figure and the accompanying ownership footnote.

What additional indirect Sky Harbour (SKYH) shareholdings are associated with Boston Omaha Corporation?

A wholly owned subsidiary, United Casualty & Surety Insurance Company, holds an additional 2,673,831 shares of Sky Harbour Class A common stock, reported as indirectly owned in the Form 4 footnote.

Does Boston Omaha Corporation still hold Sky Harbour (SKYH) warrants after this transaction?

Yes. Boston Omaha Corporation continues to own warrants to purchase 7,719,779 shares of Sky Harbour Class A common stock, as specifically stated in the Form 4 footnote.

Was the Sky Harbour (SKYH) insider sale by Boston Omaha Corporation under a Rule 10b5-1 trading plan?

The Form 4 indicates the Rule 10b5-1 checkbox is not affirmed (set to false), and the footnote does not describe the sale as made under a Rule 10b5-1 trading plan.

How many Sky Harbour (SKYH) shares were sold and at what price in this Form 4?

Boston Omaha Corporation sold 360,000 shares of Sky Harbour Class A common stock at a reported $10.00 per share, described as a sale in an open-market or private transaction on 2026-08-11.

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Form 4 Insider Transactions: What Each Field Means →

Available on EDGAR 08/13/2026 - 09:44 PM Accepted by SEC EDGAR 08/13/2026 - 09:43 PM Learn about SEC filing dates

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

BOSTON OMAHA Corp

(Last) (First) (Middle)

1601 DODGE STREET, SUITE 3300

(Street)

OMAHA NEBRASKA 68102

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Sky Harbour Group Corp [ SKYH ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director	X	10% Owner
	Officer (give title below)		Other (specify below)

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/11/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Class A common stock, par value $0.001 per share	08/11/2026		S		360,000	D	$10	8,306,163	D(1)
Class A common stock, par value $0.001 per share								2,673,831	I	See Footnote 1(1)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. All of the shares of Class A common stock sold as reported on this Form 4 were sold by Boston Omaha Corporation. As of the date of this report, Boston Omaha Corporation now owns 8,306,163 shares of the Class A common stock of Sky Harbour Group Corporation and United Casualty & Surety Insurance Company, a wholly-owned subsidiary of Boston Omaha Corporation, owns an additional 2,673,831 shares of the Class A common stock. Boston Omaha Corporation continues to own warrants to purchase 7,719,779 shares of Class A common stock of Sky Harbour Group Corporation.

	/s/ Joshua P. Weisenburger on behalf of Boston Omaha Corporation	08/13/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)