LEXICON PHARMACEUTICALS, INC.

We are a biopharmaceutical company with a mission of pioneering medicines that transform patients’ lives. We are devoting most of our resources to the research and development of our most advanced drug candidates and the commercialization of our approved drug, INPEFA (sotagliflozin): We are developing sotagliflozin, an orally-delivered small molecule drug candidate, as a treatment for hypertrophic cardiomyopathy, or HCM, and are conducting the SONATA-HCM pivotal Phase 3 clinical trial of sotagliflozin in that indication. We are separately pursuing regulatory approval of ZYNQUISTA (sotagliflozin) as a treatment for type 1 diabetes. The U.S. Food and Drug Administration, or FDA, issued complete response letters regarding our New Drug Application, or NDA, for ZYNQUISTA in type 1 diabetes in March 2019 and December 2024. At our request, the FDA has issued a public Notice of Opportunity for Hearing, or NOOH, on whether there are grounds for denying approval of our NDA and those proceedings are ongoing. The FDA has separately provided feedback that a third-party-funded, investigator-initiated study of sotagliflozin appears to be of adequate design and employs sufficient data collection methods to provide viable evidence of the incidence of diabetic ketoacidosis, or DKA, with adequate safety data, prior to its completion, to support review of a resubmission of the NDA. We are preparing to potentially resubmit the NDA for ZYNQUISTA in type 1 diabetes if supported by patient exposure and safety data from such study.