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Hemab Therapeutics Announces Closing of Upsized Initial Public Offering and Full Exercise of Underwriters’ Option to Purchase Additional Shares

Key Takeaway: Hemab Therapeutics Holdings, Inc. has successfully closed its upsized initial public offering, selling 19,262,500 shares at $18.00 each. The offering generated approximately $346.7 million in gross proceeds. The company's stock began trading on the Nasdaq Global Select Market under the ticker COAG. The underwriters fully exercised their option to purchase additional shares.
Price reaction · baseline $25.34 (2026-05-04 close) · hit after-hours · clean, no other COAG news in the window
day 0 close
-1.3%
day 1
-1.3%
day 3
-0.9%

Market Sentiment Analysis

POSITIVE FACTORS

  • Successful closing of an upsized IPO.
  • Raised approximately $346.7 million in gross proceeds.
  • Increased visibility with shares trading on Nasdaq.

BiopharmaWatch Analysis

From our catalyst data and publicly available data · not financial advice
Best trade, last catalyst
+120%
120-day peak, hindsight
Typical move
13.9%
average across 3 past catalysts
Cash runway
~59 mo
Minimal dilution risk
Lead asset
HMB-002
Phase 1 · Von Willebrand Disease (VWD)

Full Press Release Details

CAMBRIDGE, Mass. and COPENHAGEN, Denmark, May 04, 2026 (GLOBE NEWSWIRE) -- Hemab Therapeutics Holdings, Inc. (Nasdaq: COAG), a clinical-stage biotechnology company developing therapies that reimagine the treatment of blood coagulation disorders to sustain life and human resilience, today announced the closing of its initial public offering of 19,262,500 shares of its common stock at a public offering price of $18.00 per share, including 2,512,500 additional shares of common stock issued upon the exercise in full by the underwriters of their option to purchase additional shares. All of the shares of common stock were sold by Hemab. Hemab’s common stock began trading on the Nasdaq Global Select Market on Friday, May 1, 2026 under the ticker symbol “COAG.” The gross proceeds of the offering, before deducting underwriting discounts and commissions and other offering expenses payable by Hemab, were approximately $346.7 million.
Goldman Sachs & Co. LLC, Jefferies and Evercore ISI acted as joint book-running managers for the offering. Wedbush PacGrow acted as lead manager for the offering.
A registration statement relating to the securities sold in the offering was filed with the Securities and Exchange Commission (SEC) and was declared effective on April 30, 2026. Copies of the registration statement can be accessed through the SEC’s website at www.sec.gov. The offering was made only by means of a prospectus. Copies of the final prospectus relating to the offering may be obtained from Goldman Sachs & Co. LLC, Attention: Prospectus Department, 200 West Street, New York, NY 10282, by telephone at 1-866-471-2526, or by email at prospectus-ny@ny.email.gs.com; Jefferies LLC, Attention: Equity Syndicate Prospectus Department, 520 Madison Avenue, New York, NY 10022, by telephone at (877) 821-7388, or by email at Prospectus_Department@Jefferies.com; or Evercore Group L.L.C., Attention: Equity Capital Markets, 55 East 52nd Street, New York, NY 10055, by telephone at (888) 474-0200, or by email at ecm.prospectus@evercore.com.
This press release shall not constitute an offer to sell, or a solicitation of an offer to buy these securities, nor shall there be any offer or sale of, these securities in any state or jurisdiction in which such offer, solicitation or sale would be unlawful prior to the registration or qualification under the securities laws of any such state or jurisdiction.
About Hemab Therapeutics
Hemab Therapeutics Holdings, Inc. is a clinical-stage biotechnology company developing therapies that reimagine the treatment of blood coagulation disorders to sustain life and human resilience. Hemab’s mission is to discover, develop, and commercialize innovative therapies for the millions of patients worldwide suffering from serious bleeding and thrombotic diseases. Hemab is building a franchise of innovative therapeutics designed to address critical gaps in the treatment of coagulation disorders, including sutacimig (HMB-001), a bispecific antibody in clinical development for the prophylactic treatment of Glanzmann thrombasthenia and Factor VII deficiency, and HMB-002, a monovalent antibody in clinical development for the prophylactic treatment of Von Willebrand Disease.

Frequently Asked Questions

What is the ticker symbol for Hemab Therapeutics?

Hemab Therapeutics trades under the ticker symbol COAG.

How much did Hemab raise in its IPO?

Hemab raised approximately $346.7 million in its initial public offering.

When did Hemab's shares start trading?

Hemab's shares began trading on May 1, 2026.

Who were the joint book-running managers for the IPO?

Goldman Sachs, Jefferies, and Evercore ISI acted as joint book-running managers.

Last updated: May 4, 2026