0000950170-24-012832.txt : 20240208
0000950170-24-012832.hdr.sgml : 20240208
20240208163616
ACCESSION NUMBER: 0000950170-24-012832
CONFORMED SUBMISSION TYPE: 4
PUBLIC DOCUMENT COUNT: 1
CONFORMED PERIOD OF REPORT: 20240206
FILED AS OF DATE: 20240208
DATE AS OF CHANGE: 20240208
REPORTING-OWNER:
OWNER DATA:
COMPANY CONFORMED NAME: Mason Michael
CENTRAL INDEX KEY: 0001514291
ORGANIZATION NAME:
FILING VALUES:
FORM TYPE: 4
SEC ACT: 1934 Act
SEC FILE NUMBER: 001-36167
FILM NUMBER: 24609670
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]
ORGANIZATION NAME: 03 Life Sciences
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
ownership.xml
4
X0508
4
2024-02-06
0001503802
Karyopharm Therapeutics Inc.
KPTI
0001514291
Mason Michael
C/O KARYOPHARM THERAPEUTICS INC.
85 WELLS AVENUE
NEWTON
MA
02459
false
true
false
false
EVP, CFO & Treasurer
false
Common Stock
2024-02-06
4
S
false
4205
1.5865
D
246945
D
This transaction was effected pursuant to a durable automatic sale instruction plan adopted by the reporting person on June 10, 2021, and represents a broker-assisted sale of shares to satisfy the payment of withholding tax liability incurred upon the vesting of restricted stock units. The sale does not represent a discretionary trade by the reporting person.
/s/Nancy Smith as Attorney-in-Fact for Michael Mason
2024-02-08