0000899243-21-021767.txt : 20210603 0000899243-21-021767.hdr.sgml : 20210603 20210603160634 ACCESSION NUMBER: 0000899243-21-021767 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210602 FILED AS OF DATE: 20210603 DATE AS OF CHANGE: 20210603 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Mitchener Stephen CENTRAL INDEX KEY: 0001774519 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36167 FILM NUMBER: 21992531 MAIL ADDRESS: STREET 1: C/O AXCELLA HEALTH INC. STREET 2: 840 MEMORIAL DRIVE CITY: CAMBRIDGE STATE: MA ZIP: 02139 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Karyopharm Therapeutics Inc. CENTRAL INDEX KEY: 0001503802 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 263931704 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 85 WELLS AVENUE STREET 2: SECOND FLOOR CITY: NEWTON STATE: MA ZIP: 02459 BUSINESS PHONE: 617-658-0600 MAIL ADDRESS: STREET 1: 85 WELLS AVENUE STREET 2: SECOND FLOOR CITY: NEWTON STATE: MA ZIP: 02459 4 1 doc4.xml FORM 4 SUBMISSION X0306 4 2021-06-02 0 0001503802 Karyopharm Therapeutics Inc. KPTI 0001774519 Mitchener Stephen C/O KARYOPHARM THERAPEUTICS INC. 85 WELLS AVENUE NEWTON MA 02459 0 1 0 0 SVP, Chief Business Officer Common Stock 2021-06-02 4 S 0 528 9.29 D 2472 D This transaction was a broker-assisted sale of shares to satisfy the payment of withholding tax liability incurred upon the vesting of restricted stock units and does not represent a discretionary trade by the reporting person. /s/ Nancy Smith as Attorney-in-Fact for Stephen Mitchener 2021-06-03