Breda, the Netherlands/Ghent, Belgium - argenx (Euronext & Nasdaq: ARGX), a clinical-stage biotechnology
company developing a deep pipeline of differentiated antibody-based therapies for the treatment of severe autoimmune diseases and
cancer, today announced the exercise by AbbVie of its exclusive license option to develop and commercialize ARGX-115, an antibody
targeting the novel immuno-oncology target glycoprotein A repetitions predominant (GARP).
"We are very excited by AbbVie's decision to exercise its option to license and develop ARGX-115, given its
compelling track record in oncology. We are proud of the work that this milestone represents for argenx - both in efficiently
advancing a premier Innovative Access Program candidate to clinical development and in facilitating wider recognition of the
important research out of the de Duve Institute / Université Catholique de Louvain around this first-in-class target," said Tim Van
Hauwermeiren, Chief Executive Officer of argenx. "Our Innovative Access Program remains a strategic priority for us, capitalizing
on the combined strengths of the argenx antibody platform and the deep disease biology expertise at research institutions. We
continue to seek out cutting-edge research and targets while advancing our current collaborations, all with the potential to
broaden our pipeline and demonstrate our discipline as a strategic partner."
"Immuno-oncology is one of AbbVie's key focus areas in our mission to discover and develop medicines that drive
transformational improvements in cancer treatment," said Tom Hudson, M.D., Vice President, Oncology Early Discovery and
Development, AbbVie. "Our collaboration with argenx over the past two years has been productive, and we look forward to continue
working together to fuel scientific progress for patients."
argenx and AbbVie entered into an option and license agreement for ARGX-115 in April 2016. With the option
exercise announced today, AbbVie obtains a worldwide, exclusive license to develop and commercialize ARGX-115-based products.
argenx is now eligible to potentially receive development, regulatory and commercial milestone payments of up to $625 million, as
well as tiered royalties on ARGX-115-based product sales, if approved. argenx also has the right to co-promote ARGX-115-based
products in the EU and Swiss Economic Area.
About ARGX-115
ARGX-115 employs argenx's SIMPLE Antibody(TM) technology and binds specifically to the protein glycoprotein A repetitions
predominant (GARP), which plays a key role in the regulation of production and release of active transforming growth factor beta
(TGF-beta). ARGX-115 is believed to selectively limit the immunosuppressive activity of activated regulatory T-cells (Tregs),
thereby stimulating the immune system to attack cancer cells. While the normal function of Tregs is to suppress certain
compartments of the immune system to prevent self-directed immune responses through the release of active TGF-beta, Tregs can also
prevent the immune system from recognizing and suppressing pathogenic cells including cancer cells. argenx believes the selective
inhibition of TGF-beta release by Tregs is potentially superior to systemic inhibition of TGF-beta activity or depletion of
Tregs and may give rise to therapeutic products with an improved safety profile.
ARGX-115 was discovered under argenx's Innovative Access Program with the de Duve Institute / Université
Catholique de Louvain / WELBIO and exclusively licensed under a research and option agreement in 2013.
About the Innovative Access Program (IAP)
Through the IAP, argenx collaborates closely with academic centers of excellence and emerging biotechnology companies, bringing
cutting-edge antibody discovery technologies to the heart of novel target research. The extraordinary diversity of the immune
repertoires comprising its SIMPLE Antibody(TM) Platform streamlines target validation, transforming novel protein
discoveries into next generation therapeutic antibody programs.
About argenx
argenx is a clinical-stage biotechnology company developing a deep pipeline of differentiated antibody-based therapies for the
treatment of severe autoimmune diseases and cancer. The company is focused on developing product candidates with the potential to
be either first-in-class against novel targets or best-in-class against known, but complex, targets in order to treat diseases with
a significant unmet medical need. argenx's ability to execute on this focus is enabled by its suite of differentiated antibody
technologies. The SIMPLE Antibody(TM) Platform, based on the powerful llama immune system, allows argenx to exploit
novel and complex targets, and its three complementary Fc engineering technologies are designed to expand the therapeutic index of
its product candidates.
About AbbVie
AbbVie is a global, research-based biopharmaceutical company formed in 2013 following separation from Abbott Laboratories. The
company's mission is to use its expertise, dedicated people and unique approach to innovation to develop and market advanced
therapies that address some of the world's most complex and serious diseases. Together with its wholly-owned subsidiary,
Pharmacyclics, AbbVie employs more than 28,000 people worldwide and markets medicines in more than 170 countries. For further
information on the company and its people, portfolio and commitments, please visit www.abbvie.com. Follow @abbvie on Twitter or
view careers on our Facebook or LinkedIn page.
For further information, please contact:
Joke Comijn, Director Corporate Communications & Investor Relations (argenx, EU)
+32 (0)477 77 29 44
+32 (0)9 310 34 19
info@argenx.com
Beth DelGiacco, VP Investor Relations (argenx, US)
+1 518 424 4980
bdelgiacco@argenx.com
Adelle Infante, Director External Communications (AbbVie)
+1 847 938 8745
+1 847 224 0359
adelle.infante@abbvie.com
argenx 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 and argenx's advancement of, and anticipated clinical development, regulatory and
commercial milestone and royalty payments and plans. 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's
actual results may differ materially from those predicted by the forward-looking statements as a result of various important
factors, including argenx's expectations regarding the inherent uncertainties associated with competitive developments, preclinical
and clinical trial and product development activities and regulatory approval requirements; argenx's reliance on collaborations
with third parties; estimating the commercial potential of argenx's product candidates; argenx's ability to obtain and maintain
protection of intellectual property for its technologies and drugs; argenx's limited operating history; and argenx's ability to
obtain additional funding for operations and to complete the development and commercialization of its product candidates. A further
list and description of these risks, uncertainties and other risks can be found in argenx's U.S. Securities and Exchange Commission
(SEC) filings and reports, including in argenx's most recent annual report on Form 20-F filed with the SEC, as well as subsequent
filings and reports filed by argenx with the SEC. Given these uncertainties, the reader is advised not to place any undue reliance
on such forward-looking statements. These forward-looking statements speak only as of the date of publication of this document.
argenx undertakes no obligation to publicly update or revise the information in this press release, including any forward-looking
statements, except as may be required by law.