Exhibit 99.1 MaxCyte Reports Third Quarter 2024 Financial Results and Updates Full Year 2024 Guidance ROCKVILLE, MD, November 6, 2024 — MaxCyte, Inc. (NASDAQ: MXCT; LSE: MXCT), a leading, cellengineering focused company providing enabling platform technologies to advance the discovery, development, and commercialization of next-generation cell therapeutics, today announced its financial results for the third quarter ended September 30, 2024, and updated its 2024 guidance. Third Quarter and Recent Highlights ...