INVESTOR ACTION REMINDER: The Schall Law Firm Announces the Filing of a Class Action Lawsuit Against Karyopharm Therapeutics Inc. and Encourages Investors with Losses in Excess of $100,000 to Contact the Firm

Investors who purchased the Company's shares between March 2, 2017 and February 22, 2019, inclusive (the ''Class Period''), are encouraged to contact the firm before September 23, 2019.