# EDGAR Filing Document

**Accession Number:** 0001823587
**File Stem:** 0001140361-26-017875
**Filing Date:** 2026-4
**Character Count:** 2207
**Document Hash:** 539839bd13dd5ddc0af87d609f02d472
**Contains OCR:** False
**Source Format:** 

## Filing Content

## Filing Summary
**0001140361-26-017875.hdr.sgml**: 20260430

**ACCESSION NUMBER**: 0001140361-26-017875

**CONFORMED SUBMISSION TYPE**: DEFA14A

**PUBLIC DOCUMENT COUNT**: 3

**FILED AS OF DATE**: 20260430

**DATE AS OF CHANGE**: 20260429

**FILER**: 

**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:** DEFA14A
- **SEC ACT:** 1934 Act
- **SEC FILE NUMBER:** 001-39648
- **FILM NUMBER:** 26918277

**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

### UNITED STATES<br>

### SECURITIES AND EXCHANGE COMMISSION<br>

### Washington, D.C. 20549

### SCHEDULE 14A

### Proxy Statement Pursuant to Section 14(a) of the<br>

### Securities Exchange Act of 1934
Filed by the Registrant ☒ <br> Filed by a Party other than the Registrant ☐

Check the appropriate box:

☐ Preliminary Proxy Statement

☐ **Confidential, for Use of the Commission Only (as permitted by Rule 14a-6(e)(2))**

☐ Definitive Proxy Statement

☒ Definitive Additional Materials

☐ Soliciting Material Pursuant to §240.14a-12

## Sky Harbour Group Corporation <br>

## (Name of Registrant as Specified In Its Charter) <br>

## &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <br>

## N/A <br>

## (Name of Person(s) Filing Proxy Statement, if other than the Registrant)
Payment of Filing Fee (Check the appropriate box):

☒ No fee required. <br> ☐ Fee paid previously with preliminary materials. <br> ☐ Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 14a-6(i)(1) and 0-11.

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