# EDGAR Filing Document

**Accession Number:** 0001823587
**File Stem:** 0001437749-26-011780
**Filing Date:** 2026-4
**Character Count:** 16797
**Document Hash:** cd44a71aa975ffc7e313a73649f36fc4
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001437749-26-011780.hdr.sgml**: 20260408

**ACCESSION NUMBER**: 0001437749-26-011780

**CONFORMED SUBMISSION TYPE**: SCHEDULE 13D/A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260408

**DATE AS OF CHANGE**: 20260408

**SUBJECT COMPANY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** Sky Harbour Group Corp
- **CENTRAL INDEX KEY:** 0001823587
- **STANDARD INDUSTRIAL CLASSIFICATION:** REAL ESTATE [6500]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 852732947
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 005-91830
- **FILM NUMBER:** 26848738

**BUSINESS ADDRESS:**
- **STREET 1:** 1601 DODGE STREET
- **STREET 2:** SUITE 3300
- **CITY:** OMAHA
- **STATE:** NE
- **ZIP:** 68102
- **BUSINESS PHONE:** (402) 225-6511

**MAIL ADDRESS:**
- **STREET 1:** 1601 DODGE STREET
- **STREET 2:** SUITE 3300
- **CITY:** OMAHA
- **STATE:** NE
- **ZIP:** 68102

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** Yellowstone Acquisition Co
- **DATE OF NAME CHANGE:** 20200903
**FILED BY**: 

**COMPANY DATA:**
- **COMPANY CONFORMED NAME:** BOSTON OMAHA Corp
- **CENTRAL INDEX KEY:** 0001494582
- **STANDARD INDUSTRIAL CLASSIFICATION:** REAL ESTATE OPERATORS (NO DEVELOPERS) & LESSORS [6510]
- **ORGANIZATION NAME:** 05 Real Estate & Construction
- **EIN:** 270788438
- **STATE OF INCORPORATION:** DE
- **FISCAL YEAR END:** 1231

**FILING VALUES:**
- **FORM TYPE:** SCHEDULE 13D/A

**BUSINESS ADDRESS:**
- **STREET 1:** 1601 DODGE STREET
- **STREET 2:** SUITE 3300
- **CITY:** OMAHA
- **STATE:** NE
- **ZIP:** 68102
- **BUSINESS PHONE:** 857-256-0079

**MAIL ADDRESS:**
- **STREET 1:** 1601 DODGE STREET
- **STREET 2:** SUITE 3300
- **CITY:** OMAHA
- **STATE:** NE
- **ZIP:** 68102

**FORMER COMPANY:**
- **FORMER CONFORMED NAME:** REO PLUS, INC.
- **DATE OF NAME CHANGE:** 20100618

## Ex-2

**Exhibit 2.1**

**SCHEDULE OF OFFICERS AND DIRECTORS**

The name, present principal occupation or employment and citizenship of each of the executive officers and directors of the Reporting Person are set forth below. The business address of each individual associated with the Reporting Person is c/o 1601 Dodge Street, Suite 3300, Omaha, NE 68102.

**<u>Boston Omaha</u>**<u> </u>**<u>Corporation</u>**

---

| | | |
|:---|:---|:---|
| Name | Present Principal Occupation or Employment | Citizenship |
| Adam K. Peterson | Chairperson, President and Chief Executive Officer | USA |
| Joshua P. Weisenburger | Chief Financial Officer, Secretary, and Treasurer | USA |
| Tom Burt | President and Chief Executive Officer of Election Systems & Software, LLC (Director) | USA |
| David S. Graff | Chief Executive Officer of Agile Sports Technologies, Inc. (Director) | USA |
| Brendan J. Keating | Managing Partner of Local Asset Management, LLC (Director) | USA |
| Frank H. Kenan II | Co-Founder and Principal of KD Capital Management, LLC (Director) | USA |
| Jeffrey C. Royal | Chief Executive Officer of Old Market Capital Corp, Inc. (Director) | USA |
| Vishnu Srinivasan | Chief Investment Officer of The Ohio State University (Director) | USA |

---

## Ex-4

**EXHIBIT 4.1**

**SCHEDULE OF TRANSACTIONS**

The following table sets forth all transactions of Class A Stock effected by the Reporting Person since the filing of Amendment No. 4 on April 28, 2025.

---

| | | | | | | |
|:---|:---|:---|:---|:---|:---|:---|
| **<u>Nature of</u>** <br> **<u>Transaction</u>** | **<u>Title of</u>** <br> **<u>Security</u>** | **<u>Date</u>** | **<u>Shares of Class A</u>** <br> **<u>Stock</u>** <br> **<u>Sold/Transferred</u>** | **<u>Average</u>** <br> **<u>Price Per</u>** <br> **<u>Share</u>** | **<u>Gross Proceeds</u>** | **<u>Total</u>** <br> **<u>Shares of</u>** <br> **<u>Class A</u>** <br> **<u>Stock</u>** <br> **<u>Remaining</u>** |
| Sale | Class A Stock | 4/25/2025 | 15383 | $10.9495 | $168436.03 | 11858735 |
| Sale | Class A Stock | 4/28/2025 | 13691 | $10.8836 | $149007.67 | 11845044 |
| Sale | Class A Stock | 5/19/2025 | 31197 | $11.8496 | $369672.03 | 11813847 |
| Sale | Class A Stock | 5/20/2025 | 3842 | $11.6799 | $44874.00 | 11810005 |
| Sale | Class A Stock | 5/21/2025 | 701 | $11.2814 | $7908.25 | 11809304 |
| Sale | Class A Stock | 5/22/2025 | 19024 | $10.8737 | $206861.98 | 11790280 |
| Sale | Class A Stock | 5/23/2025 | 24322 | $10.8068 | $262843.25 | 11765958 |
| Sale | Class A Stock | 5/27/2025 | 11198 | $10.0701 | $123962.56 | 11754760 |
| Sale | Class A Stock | 5/28/2025 | 12136 | $10.6921 | $129759.86 | 11742624 |
| Sale | Class A Stock | 5/29/2025 | 18291 | $10.7869 | $197303.61 | 11724333 |
| Sale | Class A Stock | 5/30/2025 | 52839 | $10.3024 | $544368.35 | 11671494 |
| Sale | Class A Stock | 4/6/2026 | 331500 | $9.05 | $3000075.00 | 11339994 |

---

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

## SCHEDULE 13D

### Under the Securities Exchange Act of 1934

**(Amendment No. 5)**

**Sky Harbour Group Corp**

*(Name of Issuer)*

**Class A common stock, par value $0.0001 per share**

*(Title of Class of Securities)*

**—**

*(CUSIP Number)*

**Joshua P. Weisenburger**<br>Boston Omaha Corporation<br>1601 Dodge Street, Suite 3300<br>Omaha NE 68102<br>(402) 201-2073

*(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)*

**04/06/2026**

*(Date of Event Which Requires Filing of this Statement)*

| **CUSIP No.** | **—** |

---

| | | | |
|:--|:--|:--|:--|
| 1 | Name of reporting person<br>**BOSTON OMAHA Corp** | Name of reporting person<br>**BOSTON OMAHA Corp** | |
| 2 | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | Check the appropriate box if a member of a Group (See Instructions)<br>[x] (a)<br>[ ] (b) | |
| 3 | SEC use only | SEC use only | |
| 4 | Source of funds (See Instructions)<br>**OO** | Source of funds (See Instructions)<br>**OO** | |
| 5 | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)<br>[ ] | |
| 6 | Citizenship or place of organization<br>**DELAWARE** | Citizenship or place of organization<br>**DELAWARE** | |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 7 | Sole Voting Power<br>**19059773.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 8 | Shared Voting Power<br>**0.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 9 | Sole Dispositive Power<br>**19059773.00** |
| Number of Shares<br>Beneficially Owned by<br>Each Reporting Person With: | 10 | Shared Dispositive Power<br>**0.00** |
| 11 | Aggregate amount beneficially owned by each reporting person<br>**19059773.00** | Aggregate amount beneficially owned by each reporting person<br>**19059773.00** | |
| 12 | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)<br>[ ] | |
| 13 | Percent of class represented by amount in Row (11)<br>**45.6%** | Percent of class represented by amount in Row (11)<br>**45.6%** | |
| 14 | Type of Reporting Person (See Instructions)<br>**CO** | Type of Reporting Person (See Instructions)<br>**CO** | |

---

**Comment for Reporting Person:** (1)	 Comprised of 11,339,994 shares of the Issuer's (as defined below) Class A common stock, par value $0.0001 (the "Class A Stock"), and warrants exercisable for 7,719,779 shares of Class A Stock ("Warrant Shares") held by the Reporting Person, each as of April 8, 2026.

45.56% of Class A common stock(2); 22.72% beneficial ownership of the combined voting Class A common stock and Class B common stock(3)

(2)	 Calculated based on the shares of Class A Stock, including Warrant Shares, beneficially owned by the Reporting Person relative to the Issuer's 34,114,924 outstanding shares of Class A Stock, as of March 12, 2026, as reported in the Issuer's Annual Report on Form 10-K filed with the SEC on March 19, 2026, plus the 7,719,779 Warrant Shares owned by the Reporting Person.

(3)	 Calculated based on the shares of Class A Stock, including Warrant Shares, beneficially owned by the Reporting Person relative to the Issuer's 34,114,924 outstanding shares of Class A Stock and 42,046,356 outstanding shares of Class B common stock, par value $0.0001 per share ("Class B Stock" and together with the Class A Stock, the "Common Stock"), as of March 12, 2026, as reported in the Issuer's Annual Report on Form 10-K filed with the SEC on March 19, 2026, plus the 7,719,779 Warrant Shares owned by the Reporting Person.

**Item 1. Security and Issuer**

**(a) Title of Class of Securities:**
Class A common stock, par value $0.0001 per share

**(b) Name of Issuer:**
Sky Harbour Group Corp

**(c) Address of Issuer's Principal Executive Offices:**
1601 DODGE STREET, OMAHA, NE, 68102

This Amendment No. 5 to Schedule 13D (this "Amendment No. 3") amends and supplements the Schedule 13D filed with the U.S. Securities and Exchange Commission (the "SEC") on February 4, 2022, as amended and supplemented by (i) Amendment No. 1 to Schedule 13D, filed with the SEC on May 21, 2024, (ii) Amendment No. 2 to Schedule 13D, filed with the SEC on May 31, 2024, (iii) Amendment No. 3 to Schedule 13D, filed with the SEC on February 14, 2025, and (iv) Amendment No. 4 to Schedule 13D, filed with the SEC on April 28, 2025 (as so amended and supplemented, the "Schedule 13D"). As further described in Item 4, this Amendment No. 5 is being filed in connection with the sale of shares of Class A Stock by the Reporting Person. Each capitalized term used but not defined herein has the meaning ascribed to such term in the Schedule 13D.

**Item 4. Purpose of Transaction**

Item 4 of the Schedule 13D is hereby supplemented as follows:

From April 25, 2025 through April 6, 2026, the Reporting Person sold an aggregate of 534,124 shares of Class A Stock at price ranging between $9.05 and $11.99 per share, for total gross proceeds of $5,205,072.59, pursuant to an effective registration statement and under Rule 144 under the Securities Act of 1933, as amended. As a consequence, the Reporting Person's beneficial ownership decreased to 19,059,773 shares of Class A Stock (including the 7,719,779 Warrant Shares). The Reporting Person's beneficial ownership represents 45.56% of the outstanding Class A Stock and 22.72% of the combined voting Common Stock, a decrease primarily caused by such sale by the Reporting Person of 331,500 shares of Class A Stock on April 6, 2026 and additional shares sold during the period from April 25, 2025 through May 30, 2025. A schedule of each such sale transaction by the Reporting Person is attached hereto as Exhibit 4.1.

**Item 5. Interest in Securities of the Issuer**

**(a)**
Item 5 of the Original Schedule 13D is hereby amended and restated in its entirety as follows:

(a) - (b)

The following sets forth, as of the date of this Amendment No. 5, the aggregate number of shares of Issuer's Class A Stock and percentage of Class A Stock (including Warrant Shares) beneficially owned by the Reporting Person, and which the Reporting Person has the sole or shared power to vote or to direct the vote, sole or shared power to dispose or to direct the disposition of, as of the date hereof, based on 34,114,924 outstanding shares of Class A Stock of the Issuer, as of March 12, 2026, as reported by the Issuer in its Annual  Report on Form 10-K filed with the SEC on March 19, 2026 plus the Warrant Shares.

The following also sets forth the combined voting power of the 19,059,773 shares of Class A Stock (including Warrant Shares) beneficially owned by the Reporting Person relative to the Issuer's total outstanding Common Stock, as to which the Reporting Person has the sole or shared power to vote or to direct the vote, and sole or shared power to dispose or to direct the disposition of, as of the date hereof, based on 34,114,924 shares of the Issuer's Class A Stock and 42,046,356 shares of the Issuer's Class B Stock issued and outstanding as of as of March 12, 2026, as reported by the Issuer in its Annual Report on Form 10-K filed with the SEC on March 19, 2026, plus the Warrant Shares.

(1) 	Consists of 11,339,994 shares of Class A Stock and 7,719,779 Warrant Shares held by the Reporting Person.

(2)     Calculated based on the shares of Class A Stock, including Warrant Shares, beneficially owned by the Reporting Person relative to the Issuer's 34,114,924 outstanding shares of Class A Stock, as of March 12, 2026, as reported by the Issuer in its Annual Report on Form 10-K filed with the SEC on March 19, 2026, plus the 7,719,779 Warrant Shares.

(3)     Calculated based on the shares of Class A Stock, including Warrant Shares, beneficially owned by the Reporting Person relative to the Issuer's 34,114,924 outstanding shares of Class A Stock and 42,046,356 outstanding shares of Class B Stock, as of March 12, 2026, as reported by the Issuer in its Annual Report on Form 10-K filed with the SEC on March 19, 2026, plus the 7,719,779 Warrant Shares. Holders of Class A Stock and Class B Stock are entitled to one vote per share on all matters submitted to the stockholders for their vote or approval.

**(b)**
Item 5 of the Original Schedule 13D is hereby amended and restated in its entirety as follows:

(a) - (b)

The following sets forth, as of the date of this Amendment No. 5, the aggregate number of shares of Issuer's Class A Stock and percentage of Class A Stock (including Warrant Shares) beneficially owned by the Reporting Person, and which the Reporting Person has the sole or shared power to vote or to direct the vote, sole or shared power to dispose or to direct the disposition of, as of the date hereof, based on 34,114,924 outstanding shares of Class A Stock of the Issuer, as of March 12, 2026, as reported by the Issuer in its Annual  Report on Form 10-K filed with the SEC on March 19, 2026 plus the Warrant Shares.

The following also sets forth the combined voting power of the 19,059,773 shares of Class A Stock (including Warrant Shares) beneficially owned by the Reporting Person relative to the Issuer's total outstanding Common Stock, as to which the Reporting Person has the sole or shared power to vote or to direct the vote, and sole or shared power to dispose or to direct the disposition of, as of the date hereof, based on 34,114,924 shares of the Issuer's Class A Stock and 42,046,356 shares of the Issuer's Class B Stock issued and outstanding as of as of March 12, 2026, as reported by the Issuer in its Annual Report on Form 10-K filed with the SEC on March 19, 2026, plus the Warrant Shares.

(1) 	Consists of 11,339,994 shares of Class A Stock and 7,719,779 Warrant Shares held by the Reporting Person.

(2)     Calculated based on the shares of Class A Stock, including Warrant Shares, beneficially owned by the Reporting Person relative to the Issuer's 34,114,924 outstanding shares of Class A Stock, as of March 12, 2026, as reported by the Issuer in its Annual Report on Form 10-K filed with the SEC on March 19, 2026, plus the 7,719,779 Warrant Shares.

(3)     Calculated based on the shares of Class A Stock, including Warrant Shares, beneficially owned by the Reporting Person relative to the Issuer's 34,114,924 outstanding shares of Class A Stock and 42,046,356 outstanding shares of Class B Stock, as of March 12, 2026, as reported by the Issuer in its Annual Report on Form 10-K filed with the SEC on March 19, 2026, plus the 7,719,779 Warrant Shares. Holders of Class A Stock and Class B Stock are entitled to one vote per share on all matters submitted to the stockholders for their vote or approval.

**(c)**
Except as described elsewhere in this Amendment No. 5, including in Item 4 and Exhibit 4.1 incorporated herein by reference, during the past 60 days, neither the Reporting Person nor, to the knowledge of the Reporting Person, any person named in Item 2 hereof, have effected any transactions with respect to the Issuer's Class A Stock.

**Item 6. Contracts, Arrangements, Understandings or Relationships With Respect to Securities of the Issuer.**

The information in Item 5 of this Amendment No. 5 is incorporated by reference into this Item 6.

### SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

**Reporting Person:** BOSTON OMAHA Corp

**Signature:** /s/ Adam K. Peterson

**Name/Title:** Adam K. Peterson, President and Chief Executive Officer

**Date:** 04/08/2026