|  | |  |  | Geron Corporation (Nasdaq: GERN), a late-stage clinical biopharmaceutical      company, today announced the closing of its previously announced      underwritten public offering of 53,333,334 shares of its common stock and      pre-funded warrants to purchase 18,095,238 shares of common stock,      together with accompanying warrants to purchase 35,714,286 shares of      common stock. The combined offering price to the public of each share of      common stock and accompanying warrant was $1.05. The combined offering      price to the public of each pre-funded warrant and accompanying warrant      was $1.049. The common stock and pre-funded warrants were sold in      combination with an accompanying warrant to purchase 0.5 of a share of      common stock issued for each share of common stock or pre-funded warrant      sold. The accompanying warrant has an exercise price of $1.45 per share      and expires five years from the date of issuance; however, such term will      be shortened upon achievement of a regulatory milestone. 
 The      estimated net proceeds to Geron from this underwritten public offering are      approximately $70 million, after deducting the underwriting discount and      other estimated offering expenses payable by Geron. Geron currently      intends to use the net proceeds from this public offering, together with      its existing cash, cash equivalents, restricted cash and marketable      securities, to fund potential regulatory filings in the United States and      European Union for imetelstat in lower risk myelodysplastic syndromes      (MDS), assuming top-line results in the IMerge Phase 3 clinical trial are      supportive, and to support toward the completion of the IMpactMF clinical      trial in refractory myelofibrosis and the planned exploratory studies in      new indications, including IMproveMF and investigator-led trials in acute      myeloid leukemia and higher risk MDS, the preclinical work in lymphoid      malignancies and the discovery research program related to next generation      telomerase inhibitors.
 
 Stifel and Baird acted as joint book-running      managers for the public offering and Needham & Company acted as lead      manager.
 
 A shelf registration statement on Form S-3 relating to the      public offering of the shares of common stock, pre-funded warrants and      accompanying warrants described above was previously filed with the      Securities and Exchange Commission (SEC) and subsequently declared      effective by the SEC. A final prospectus supplement relating to and      describing the terms of the offering has been filed with the SEC and is      available on the SEC's web site at www.sec.gov. Copies of the final      prospectus supplement relating to the offering may also be obtained from      Stifel, Nicolaus & Company, Incorporated, Attention: Syndicate, One      Montgomery Street, Suite 3700, San Francisco, California 94104, by      telephone at 415-364-2720 or by email at syndprospectus@stifel.com or      Robert W. Baird & Co. Incorporated, Attention: Syndicate Department, 777      East Wisconsin Avenue, Milwaukee, Wisconsin 53202, by telephone at      800-792-2473 or by email at syndicate@rwbaird.com.
 
 This press      release does not constitute an offer to sell or the solicitation of an      offer to buy any of these securities, nor will there be any sale of these      securities in any state or other 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 other      jurisdiction.
 
 About Geron
 
 Geron is a late-stage clinical      biopharmaceutical company focused on the development and potential      commercialization of a first-in-class telomerase inhibitor, imetelstat, in      hematologic malignancies. The Company currently is conducting two Phase 3      clinical trials: IMerge in lower risk myelodysplastic syndromes and      IMpactMF in refractory myelofibrosis.
 
 Use of Forward-Looking      Statements
 
 Investors are cautioned that statements in this press      release regarding the anticipated net proceeds from this public offering      and Geron's intended use of the net proceeds from this public offering      constitute forward-looking statements that involve risks and      uncertainties, including, without limitation, risks and uncertainties      related to: higher than estimated offering expenses; market and other      conditions; and the impact of general economic, industry or political      conditions in the United States or internationally, including the impact      of the COVID-19 pandemic and/or the Russia/Ukraine conflict on Geron's      business operations and activities. Geron will continue to need      significant additional capital to fund its operations and may be unable to      raise capital when needed, which would force Geron to delay, reduce or      eliminate its imetelstat development program. Actual results may differ      materially from the results anticipated in these forward-looking      statements. Additional information on other potential factors that could      affect Geron's results and other risks and uncertainties can be found      under the heading "Risk Factors" in Geron's periodic reports, including      its annual report on Form 10-K for the year ended December 31, 2021 and in      the final prospectus supplement related to the public offering filed with      the SEC on March 30, 2022, each available on the SEC's web site at      www.sec.gov. Geron expressly disclaims any obligation or undertaking to      release publicly any updates or revisions to any forward-looking      statements contained herein to reflect any change in its expectations with      regard thereto or any change in events, conditions or circumstances on      which any such statements are based.
 
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