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Attovia Therapeutics (Nasdaq: ATTO) closed its upsized initial public offering of 19,550,000 common shares, including the underwriters’ full option for 2,550,000 additional shares, at $17.00 per share. According to Attovia, the offering generated approximately $332.4 million in gross proceeds before underwriting discounts, commissions, and expenses, with all shares sold by the company.
Attovia’s stock began trading on the Nasdaq Global Market on August 5, 2026 under the symbol “ATTO.” Morgan Stanley, Leerink Partners, Citigroup and RBC Capital Markets were joint book‑running managers, and LifeSci Capital acted as passive book‑running manager. The SEC declared the registration statement effective on August 4, 2026.
Attovia Therapeutics (Nasdaq: ATTO), a clinical-stage biopharmaceutical company developing next-generation biotherapeutics for immune-mediated diseases, began trading on Nasdaq on August 5, 2026 Beijing time. The IPO was priced at $17.00 per share and opened at $21.00, implying an approximate market capitalization of $904 million.
Founded in 2023, Attovia discovers all its product candidates on its ATTOBODY biologics platform, licensed exclusively worldwide from Alamar Biosciences. The platform supports rapid discovery of mono‑, bi‑ and trispecific biologics. IPO proceeds will mainly fund clinical development of lead candidates ATTO‑1310, ATTO‑2306 and research on ATTO‑1091, alongside other corporate purposes.