1. WHAT IS A COOKIE?

A “cookie” is a file of a limited size, which generally consists of letters and numbers and is sent by an Internet server to the browser’s cookie file, located on your computer hard drive (or another device connected to the Internet, such as a smartphone or tablet) when you view this website.

A cookie generally includes the name of the website that it comes from, its lifecycle (the time period for which it remains on your device) and a value, which is generally a randomly generated unique number.

Two types of cookies may be used: temporary cookies and permanent cookies. Temporary cookies are automatically deleted at the end of your browsing session. Permanent cookies remain on your device for longer, for a duration of time that is specific to each cookie and remain valid until their expiry date (unless they are deleted by the user beforehand).

Cookies may be used by web servers to identify and monitor users as they browse the various pages of a website and to identify users who return to their websites.

The cookies do not contain your Personal Data but some of your Personal Data, which is stored by us, may be related to the information stored in the cookies and obtained from them. For further information on how your Personal Data is processed, please view our Privacy policy.

2. WHY DOES THIS WEBSITE USE COOKIES?

Cookies on our Site

We use cookies either for the functioning of this Site and to carry out essential functions and services that you have requested or allow us, as described below.

We also use cookies to gather aggregate data in order to ensure the management of our Site website and the browsing experience of the visitors on our Site.

Finally, we use cookies for marketing and promotional purposes.

Third Party Cookies

Our Site contains links and social media buttons of third parties. When you click on any of those buttons, your Personal Data may be transferred to these companies and they may also set cookies on your browser. The privacy policies and terms of use of each of those companies govern the collection and use of your Personal Data when you click on their buttons on our Site. Prior to installing such third party cookies or enabling you to click through to a third party website, we will have requested your consent to do so. Where consent was not given, the cookies will not be installed and the click through to third party websites will only occur after a pop-up notifying you that you are leaving the Site. Please note that we have no control over these third party cookies, which are governed only by the respective third party. Such third party cookies may trigger that some data is being transferred to countries outside the EU, where the level of privacy protection is not as elaborate.

Cookies  enable  argenx  to  track  the  following  information  about visitors. The information collected does not contain any personal data:

• anonymous unique online identifier
• IP address (masked) ;
• Location: country, region, city, approximate latitude and longitude (Geolocation);
• Date and time of the request (visit to the site);
• Title of the page being viewed (Page Title);
• URL of the page being viewed (Page URL);
• URL of the page that was viewed prior to the current page (Referrer URL);
• Screen resolution of user's device ;
• Time in local visitor's time-zone;
• Files that were clicked and downloaded (Download);
• Links to an outside domain that were clicked (Outlink);
• Pages generation time (the time it takes for webpages to be generated by the webserver and then downloaded by the visitor: Page speed);
• Main language of the browser being used (Accept-Language header);
• Browser version, browser plugins (PDF, Flash, Java, …) operating system version, device identifier (User-Agent header);
• Language of the visited page;
• Campaigns;
• Site Search;
• Events.

Google Analytics

This site uses Google Analytics, a web analytics service provided by Google, Inc ("Google"). Google Analytics uses "cookies", which are text files placed on your computer, to help the website analyse how users use the site. The information generated by the cookie about your use of the website (including your IP address) will be transmitted to and stored by Google on servers in the United States. Google will use this information for the purpose of evaluating your use of the website, compiling reports on website activity for website operators and providing other services relating to website activity and internet usage. Google may also transfer this information to third parties where required to do so by law, or where such third parties process the information on Google's behalf. You can refuse the use of cookies by selecting the appropriate settings on your browser.

You can find out about Google's practices by downloading the browser add- on  to  disable  Google  Analytics,  which  can  be  found  at https://tools.google.com/dlpage/gaoptout.

3. HOW CAN YOU MANAGE THE COOKIES USED BY THE SITE?

If you wish to decline the use of cookies by our Site or if you wish to delete or authorize new cookies on your device, (i) in a first instance you can do so via your selection in our cookie banner and the Cookies Settings link in the footer of our website and (ii) you can also modify your browser settings in order to block the cookies or to alert you when cookies are sent to your device.

Cookies may be managed in different ways. Please refer to your browser’s instructions for further information on how to set or modify your browser’s settings:

• Internet Explorer: http://windows.microsoft.com/en-US/windows- vista/How-to-manage-cookies-in-Internet-Explorer-9
• Chrome: http://support.google.com/chrome/bin/answer.py?hl=en- GB&hlrm=nl&answer=95647
• Firefox: http://support.mozilla.org/en-US/kb/enable-and-disable- cookies-website-preferences?s=cookies&r=5&as=s
• Safari: http://support.apple.com/kb/PH5042

If you disable cookies used by our Site, this may affect you when you browse the website (for example, you may not be able to view certain parts of the website or receive personalized information when you view the Site).

Consent to collecting your browsing experience, including personal data, for the production of anonymized statistics.

By default, the browsing experience of our website visitors is NOT tracked by argenx. You may, though, choose to consent to our processing of any personal data collected during your browsing experience on our website to allow us to produce anonymized statistics.

If you enable the Do Not Track option (see below for an explanation) in your web browser, we will respect your choice and your browsing experience on our website will not be tracked for our anonymized statistics.

4. UPDATES

If we make any material changes to this Cookie Policy, we will also post an updated version on the Site. Please check back periodically for updates.

Last updated: 11 July 2023