argenx to Host Conference Call & Webcast to Report Second Quarter 2016 Business Update and Half-Year Financial Results on August 26, 2016

Breda, the Netherlands / Ghent, Belgium – argenx N.V. (Euronext Brussels: ARGX), a clinical-stage biopharmaceutical company focused on creating and developing differentiated therapeutic antibodies for the treatment of cancer and severe autoimmune diseases, today announced it will host a conference call and audio webcast on Friday, August 26, 2016 at 3:00pm CET (9:00am EDT) to discuss financial results for the first half of 2016, as well as to provide a second quarter business update.

To participate in the conference call, please select your phone number below and use the confirmation code 49998398. The webcast may be accessed on the homepage of the argenx website at www.argenx.com or by clicking here.

A replay of the webcast will also be available at the argenx website.

About argenx

argenx combines the diversity of the llama immune system with antibody engineering to advance a clinical pipeline to treat patients with cancer and autoimmune diseases. Our platforms allow us to unlock novel and complex targets and develop antibody-based drugs designed for greater efficacy and longer duration of effect. The strength of our team, our deep understanding of the biology, and our committed collaborations with industry leaders contribute to the success of our journey.

argenx is listed on the Euronext Brussels exchange under the symbol ARGX.

www.argenx.com

Dial-In Numbers: Participant Free Call Dial-In Numbers:

UK	0800 694 0257

Participant Standard International Dial-In:

UK Standard International

+44 (0) 1452 555 566

Participant UK Local Call Dial-In Numbers:

UK	0844 493 3800
UK National Call	0871 700 0345

Participant Local Call Dial-In Numbers:

Australia	0290 371 687
Austria	0192 865 68
Belgium	0817 000 61
Croatia	0177 766 11
Czech Republic	2288 804 60
Denmark	3272 7625
Finland	0923 195 187
France	0176 742 428
Germany	0692 222 3479
Germany	0692 222 4918
Hungary	0618 088 303
India	0223 098 5304
Ireland	0143 196 48
Ireland	0150 601 53
Italy	0236 008 146
Latvia	6778 2516
Luxembourg	2088 0695
Netherlands	0207 176 886
New Zealand	0992 917 07
Norway	2156 3013
Poland	2230 701 18
Romania	0318 144 957
Russia	4996 771 036
Slovenia	0160 093 64
South Africa	2110 032 02
Spain	9141 436 69
Sweden	0850 336 434
Switzerland	0565 800 007
USA	1631 510 7498

For further information, please contact:

Joke Comijn, Corporate Communications Manager

+32 (0)477 77 29 44

+32 (0)9 310 34 19

info@argenx.com

Beth DelGiacco (US IR)

Stern Investor Relations

+1 212 362 1200

beth@sternir.com

Forward-looking Statements

The contents of this announcement include statements that are, or may be deemed to be, forward-looking statements. These forward-looking statements can be identified by the use of forward-looking terminology, including the terms believes, estimates, anticipates, expects, intends, may, will, or should, and include statements argenx makes concerning the intended results of its strategy. By their nature, forward-looking statements involve risks and uncertainties and readers are cautioned that any such forward-looking statements are not guarantees of future performance. argenx’ actual results may differ materially from those predicted by the forward-looking statements. argenx undertakes no obligation to publicly update or revise forward-looking statements, except as may be required by law.