Achieve Life Sciences, Inc. (Achieve or the Company) (Nasdaq: ACHV), a late-stage specialty pharmaceutical company focused on the global development and commercialization of cytisinicline as a treatment for nicotine dependence, today announced that it has been added to the Russell 2000® Index, effective June 26, 2026, as part of the Russell U.S. Indexes reconstitution. The Company is also a member of the Russell 3000® Index.