X0306 4 2022-01-25 0001823587 Sky Harbour Group Corp SKYH 0001906566 Jackson Walter C/O SKY HARBOUR GROUP CORPORATION 136 TOWER ROAD, HANGAR M, SUITE 205 WHITE PLAINS NY 10604 1 0 0 0 Class B Common Stock 2022-01-25 4 A 0 412072 A 412072 D Common Units 2022-01-25 4 A 0 412072 A Class A Common Stock 412072 412072 D In connection with the closing of the business combination between Yellowstone Acquisition Company and Sky Harbour LLC ("Sky") on January 25, 2022, certain existing equity interests previously issued by Sky were reclassified and reissued by Sky into new Common Units. In addition, each equityholder of Common Units received an equivalent number of Class B Common Stock of the Issuer. Holders of Class B Common Stock are entitled to voting rights but have no economic rights. Subject to the terms of the Third Amended and Restated Operating Agreement of Sky, the Common Units of Sky may be tendered for redemption by the Reporting Person for shares of the Issuer's Class A Common Stock on a one-to-one basis. The Common Units do not expire. /s/ Gerald Adler, Attorney-in-Fact 2022-01-27