argenx SE (NASDAQ:ARGX) Q1 2020 Earnings Conference Call May 14, 2020 9:00 AM ET Company Participants Beth DelGiacco - Vice President, Investor Relations Tim Van Hauwermeiren - Chief Executive Officer Keith Woods - Chief Operating Officer Eric Castaldi - Chief Financial Officer Conference Call Participants Ted Tenthoff - Piper Sandler Christopher Marai - Nomura Tiago Fauth - Crédit Suisse Graig Suvannavejh - Goldman Sachs Akash Tewari - Wolfe Research Derek Archila – Stifel Max Skor - Morgan Stanley James G ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2019 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to OR ☐ SHELL COMPANY REPORT PURSUANT TO SECT ...

argenx SE (NASDAQ:ARGX) Q4 2019 Earnings Conference Call February 27, 2020 9:00 AM ET Company Participants Beth DelGiacco – Vice President, Investor Relations Tim Van Hauwermeiren – Chief Executive Officer Keith Woods – Chief Operating Officer Eric Castaldi – Chief Financial Officer Conference Call Participants Tazeen Ahmad – Bank of America Christopher Marai – Nomura Instinet Derek Archila – Stifel James Gordon – JPMorgan Jason Butler – JMP Max – Morgan Stanley Akash Tewari – Wolfe Research Tiago Fauth – C ...

Table of Contents UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON, D.C. 20549 FORM 20-F (Mark One) ☐ REGISTRATION STATEMENT PURSUANT TO SECTION 12(b) OR (g) OF THE SECURITIES EXCHANGE ACT OF 1934 OR ☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31, 2018 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from to OR ☐ SHELL COMPANY REPORT PURSUANT TO SECT ...