X0508 4 2023-12-26 0001620533 Shake Shack Inc. SHAK 0001396917 Flug Jeffrey C/O SHAKE SHACK INC. 225 VARICK STREET, SUITE 301 NEW YORK NY 10014 1 0 1 0 1 Class A Common Stock 2023-12-26 4 S 0 771 75.0677 D 5740 D The transaction reported on this Form 4 was effected automatically pursuant to a Rule 10b5-1 trading plan entered into by the Reporting Person on May 18, 2023. The price reported above reflects the average weighted sales price. The transaction was executed in multiple trades at prices ranging from $75.02 to $75.14. Mr. Flug hereby undertakes to provide upon request to the SEC Staff, Shake Shack Inc. (the "Issuer") or a security holder of the Issuer full information of the number of shares and prices at which the transaction was effected. /s/ Ronald Palmese, Jr. Esq., Attorney-in-Fact for Jeffrey Flug 2023-12-28