0001209191-23-014843.txt : 20230302 0001209191-23-014843.hdr.sgml : 20230302 20230302173012 ACCESSION NUMBER: 0001209191-23-014843 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20230228 FILED AS OF DATE: 20230302 DATE AS OF CHANGE: 20230302 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Mason Michael CENTRAL INDEX KEY: 0001514291 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-36167 FILM NUMBER: 23700466 MAIL ADDRESS: STREET 1: 300 3RD STREET CITY: CAMBRIDGE STATE: MA ZIP: 02142 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 2023-02-28 0 0001503802 Karyopharm Therapeutics Inc. KPTI 0001514291 Mason Michael C/O KARYOPHARM THERAPEUTICS INC. 85 WELLS AVENUE NEWTON MA 02459 0 1 0 0 EVP, CFO & Treasurer Common Stock 2023-02-28 4 A 0 95000 0.00 A 256566 D Common Stock 2023-03-01 4 S 0 11205 3.0292 D 245361 D Represents the award of restricted stock units ("RSUs") pursuant to the Karyopharm Therapeutics Inc. 2022 Equity Incentive Plan. RSUs convert into Karyopharm Therapeutics Inc. common stock on a one-for-one basis. The RSUs vest in three equal annual installments beginning February 28, 2024. 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 Michael Mason 2023-03-02