Exhibit 99.1 Earnings Results & Supplemental Information For the Three Months Ended March 31, 2024 The Macerich Company Earnings Results & Supplemental Information For the Three Months Ended March 31, 2024 Table of Contents All information included in this supplemental financial package is unaudited, unless otherwise indicated. Page No. Executive Summary & Financial Highlights 1 Executive Summary 1 Financial Highlights 4 Capital Information 8 Capital Information and Market Capitalization 8 Changes in Total ...