0001104659-21-113880.txt : 20210908 0001104659-21-113880.hdr.sgml : 20210908 20210908173127 ACCESSION NUMBER: 0001104659-21-113880 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20210907 FILED AS OF DATE: 20210908 DATE AS OF CHANGE: 20210908 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: Kruse Bo CENTRAL INDEX KEY: 0001752940 FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-38650 FILM NUMBER: 211243026 MAIL ADDRESS: STREET 1: C/O Y-MABS THERAPEUTICS, INC. STREET 2: 230 PARK AVENUE, 33RD FLOOR CITY: NEW YORK STATE: NY ZIP: 10169 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: Y-mAbs Therapeutics, Inc. CENTRAL INDEX KEY: 0001722964 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] IRS NUMBER: 474619612 STATE OF INCORPORATION: DE FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 230 PARK AVENUE STREET 2: SUITE 3350 CITY: NEW YORK STATE: NY ZIP: 10169 BUSINESS PHONE: 212-847-9841 MAIL ADDRESS: STREET 1: 230 PARK AVENUE STREET 2: SUITE 3350 CITY: NEW YORK STATE: NY ZIP: 10169 4 1 tm2127055-2_4seq1.xml OWNERSHIP DOCUMENT X0306 4 2021-09-07 0 0001722964 Y-mAbs Therapeutics, Inc. YMAB 0001752940 Kruse Bo C/O Y-MABS THERAPEUTICS, INC. 230 PARK AVENUE SUITE 3350 NEW YORK NY 10169 0 1 0 0 EVP, CFO, Secretary & Treas. Common Stock 2021-09-07 4 S 0 4000 32.03 D 225077 D Represents shares sold pursuant to a Rule 10b5-1 trading plan adopted on March 31, 2021. /s/ Bo Kruse 2021-09-08