Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-38650 Y-mAbs Therapeutics, Inc. (Exact name of registrant as specified in its charter) (State or other jurisdiction o ...

Y-mAbs Therapeutics, Inc. (NASDAQ:YMAB) Q2 2023 Earnings Call Transcript August 11, 2023 9:00 AM ET Company Participants Courtney Dugan - Head of IR Thomas Gad - Founder, President & Interim CEO Vignesh Rajah - CMO Sue Smith - CCO Bo Kruse - CFO Conference Call Participants Alec Stranahan - Bank of America Charles Zhu - Guggenheim Securities Mike Ulz - Morgan Stanley Bill Maughan - Canaccord Genuity Tessa Romero - JP Morgan Luke Shumway - BMO Capital Markets Operator Good morning, and welcome to the Y-mAbs ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended June 30, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-38650 Y-mAbs Therapeutics, Inc. (Exact name of registrant as specified in its charter) (State or other jurisdiction of (I. ...

Y-mAbs Therapeutics, Inc. (NASDAQ:YMAB) Q1 2023 Earnings Conference Call May 9, 2023 9:00 AM ET Company Participants Thomas Gad - Founder, President, Interim Chief Executive Officer Sue Smith - Senior Vice President and Chief Commercial Officer Vignesh Rajah - Senior Vice President and Chief Medical Officer Bo Kruse - Chief Financial Officer, Treasurer, and Secretary Conference Call Participants William Maughan - Canaccord Genuity Mike Ulz - Morgan Stanley Charles Zhu - Guggenheim Securities Tessa Romero - ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended March 31, 2023 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-38650 Y-mAbs Therapeutics, Inc. (Exact name of registrant as specified in its charter) (State or other jurisdiction of (I ...

Y-mAbs Therapeutics, Inc. (NASDAQ:YMAB) Q4 2022 Earnings Conference Call March 31, 2023 9:00 AM ET Company Participants Thomas Gad - Founder, Interim CEO & President Sue Smith - SVP & Chief Commercial Officer Bo Kruse - EVP, Secretary, Treasurer & CFO Vignesh Rajah - Chief Medical Officer Conference Call Participants Alec Stranahan - Bank of America Etzer Darout - BMO Capital Markets William Maughan - Canaccord Genuity Taylor Hanley - JPMorgan Edouard Mullarky - Guggenheim Securities Operator Good mornin ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-K (Mark One) ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2022. OR Registrant's telephone number, including area code (646)-885-8505 Securities registered pursuant to Section 12(b) of the Act: Title of each class: Trading Symbol Name of each exchange on which registered: ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SE ...

Y-mAbs Therapeutics, Inc. (NASDAQ:YMAB) Q3 2022 Earnings Conference Call November 8, 2022 4:00 PM ET Company Participants Thomas Gad - Founder, Interim CEO & President Sue Smith - SVP & Chief Commercial Officer Bo Kruse - EVP, Secretary, Treasurer & CFO Conference Call Participants Alec Stranahan - Bank of America Merrill Lynch Etzer Darout - BMO Capital Markets William Maughan - Canaccord Genuity Edouard Mullarky - Guggenheim Securities Tessa Romero - JPMorgan Chase & Co. Sebastiaan van der Schoot - Kempen ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 10-Q ☒ QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30, 2022 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to Commission file number 001-38650 Y-mAbs Therapeutics, Inc. (Exact name of registrant as specified in its charter) (State or other jurisdiction o ...

Y-mAbs Therapeutics, Inc. (NASDAQ:YMAB) Q2 2022 Results Conference Call August 9, 2022 9:00 AM ET Company Participants Thomas Gad - Founder, Interim CEO and President Bo Kruse - CFO Sue Smith - Chief Commercial Officer Vignesh Rajah - Chief Medical Officer Conference Call Participants Alec Stranahan - Bank of America Robert Burns - HC Wainwright Charles Zhu - Guggenheim Joseph Thome - Cowen & Company Tessa Romero - JP Morgan Mike Ulz - Morgan Stanley William Maughan - Canaccord Genuity Operator Good morning ...