United States securities and exchange commission logo November 16, 2021 Mitchell Gold Chief Executive Officer Alpine Immune Sciences, Inc. 188 East Blaine Street, Suite 200 Seattle, WA 98102 Re: Alpine Immune Sciences, Inc. Registration Statement on Form S-3 Filed November 10, 2021 File No. 333-260971 Dear Dr. Gold: This is to advise you that we have not reviewed and will not review your registration statement. Please refer to Rules 460 and 461 regarding requests for acceleration. We remind you that the company and its management are responsible for the accuracy and adequacy of their disclosures, notwithstanding any review, comments, action or absence of action by the staff. Please contact Jane Park at 202-551-7439 with any questions. Sincerely, Division of Corporation Finance Office of Life Sciences cc: Bryan King