Exhibit 99.1 Shake Shack Announces First Quarter 2024 Financial Results ▪ Total revenue of $290.5 million, up 14.7% versus 2023, including $280.6 million of Shack sales and $9.9 million of Licensing revenue. ▪ System-wide sales of $443.3 million, up 12.3% versus 2023. ▪ Same-Shack sales up 1.6% versus 2023, with trends improving each month of the quarter. April SSS grew 4.9% year-over-year. ▪ Operating income of $0.0 million, versus an operating loss of $3.2 million in 2023. • Restaurant-level profit(1) of ...