Exhibit 99.1 TELESAT CORPORATION Quarterly Report For the Three and Six Month Periods Ended June 30, 2023 PART I. FINANCIAL INFORMATION Item 1. Financial Statements 1 Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations 26 Item 3. Quantitative and Qualitative Disclosures About Market Risk 54 PART II. OTHER INFORMATION Item 1. Legal Proceedings 55 Item 1A. Risk Factors 55 Item 2. Unregistered Sales of Equity Securities and Use of Proceeds 55 Item 3. Defaults Upon Seni ...