Alpine Immune Sciences Announces Proposed Public Offering
Washingtoner/10237905

SEATTLE--(BUSINESS WIRE)--Alpine Immune Sciences, Inc. (Nasdaq: ALPN), a clinical-stage immunotherapy company focused on developing innovative treatments for autoimmune and inflammatory diseases, today announced that it has commenced an underwritten public offering of $150 million of shares of its common stock pursuant to its existing shelf registration statement. It is expected that the underwriters of the offering will be granted an option for a period of 30 days to purchase up to an additional $22.5 million of shares of common stock at the public offering price, less the underwriting discounts and commissions. All shares of common stock to be sold in the proposed offering will be sold by Alpine. The offering is subject to market and other conditions, and there can be no assurance as to whether or when the offering may be completed, or as to the actual size or terms of the offering.

Morgan Stanley, TD Cowen and Leerink Partners are acting as joint book-running managers for the proposed public offering. RBC Capital Markets is acting as a bookrunner and Oppenheimer & Co. and H.C. Wainwright & Co. are acting as co-lead managers for the proposed public offering.

A shelf registration statement relating to the securities offered in the proposed public offering described above was filed with the Securities and Exchange Commission (SEC) on April 28, 2023 and declared effective by the SEC on May 9, 2023. The offering will be made only by means of a written prospectus and prospectus supplement that form a part of the registration statement. A preliminary prospectus supplement and accompanying prospectus relating to the offering will be filed with the SEC and will be available on the SEC's website at www.sec.gov. Copies of the preliminary prospectus supplement and the accompanying prospectus, when available, may also be obtained by contacting Morgan Stanley & Co. LLC, Attention: Prospectus Department, 180 Varick Street, 2nd Floor, New York, New York 10014, by telephone: 1-866-718-1649, or by email at prospectus@morganstanley.com; Cowen and Company, LLC, 599 Lexington Avenue, New York, NY 10022, by telephone at (833) 297-2926, or by email at Prospectus_ECM@cowen.com; Leerink Partners LLC, Attention: Syndicate Department, 53 State Street, 40th Floor, Boston, MA 02109, by telephone at (800) 808-7525, ext. 6105, or by email at syndicate@leerink.com; RBC Capital Markets, Attention: Equity Capital Markets, 200 Vesey Street, 8th Floor, New York, NY 10281, by telephone at (877) 822-4089, or by e-mail at equityprospectus@rbccm.com.

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This press release shall not constitute an offer to sell or the solicitation of an offer to buy the securities being offered, nor shall there be any sale of the securities being offered 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.

Safe Harbor Statement

This press release contains forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934 and the Private Securities Litigation Reform Act of 1995. These forward-looking statements are not based on historical fact and include statements regarding the anticipated public offering. These forward-looking statements are based on current assumptions that involve risks, uncertainties and other factors that may cause the actual results, events or developments to be materially different from those expressed or implied by such forward-looking statements. These risks and uncertainties, many of which are beyond our control, include, but are not limited to, uncertainties related to market conditions and the completion of the proposed public offering on the anticipated terms or at all, as well as the other risks identified in our filings with the SEC. These forward-looking statements speak only as of the date hereof and we assume no obligation to update these forward-looking statements, and readers are cautioned not to place undue reliance on such forward-looking statements.

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Contacts

Media and Investor Relations Contact:
Temre Johnson
Alpine Immune Sciences, Inc.
ir@alpineimmunesciences.com
media@alpineimmunesciences.com

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