Paula Ragan is the founder of X4 Pharmaceuticals. X4 Pharmaceuticals has raised $75M in total funding. Based in Boston, United States.
Paula Ragan, PhD, served as the President and Chief Executive Officer of X4 Pharmaceuticals, a Boston-based company focused on rare immune system diseases. She led the company through private fundraising rounds totaling approximately $75 million before stepping down from her executive role on August 12, 2025. Under her leadership, X4 Pharmaceuticals secured a $60 million PIPE financing led by Coastlands Capital, Bain Capital Life Sciences, and New Enterprise Associates.
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