Galapagos NV — Major Shareholding Notification 2019

Sep 2, 2019

Transparency notification

Mechelen, Belgium; 30 August 2019; 22.01 CET; regulated information – Galapagos NV (Euronext & NASDAQ: GLPG) received a transparency notification from Van Herk Investments B.V.

Pursuant to Belgian transparency legislation¹ , Galapagos received a transparency notification on 29 August 2019 from Van Herk Investments B.V., who notified that it holds 5,800,301 of Galapagos' voting rights, consisting of ordinary shares (4,895,647) and American Depository Receipts (904,654). This represents 9.41% of Galapagos' currently outstanding 61,652,086 shares. Van Herk Investments B.V. thus crossed passively below the 10% threshold of Galapagos' voting rights due to the share issuance by Galapagos on 23 August 2019. Van Herk Investments B.V. is controlled by Adrianus van Herk. The full transparency notice is available on the Galapagos website.

About Galapagos

Galapagos (Euronext & NASDAQ: GLPG) discovers and develops small molecule medicines with novel modes of action, three of which show promising patient results and are currently in latestage development in multiple diseases. The company's pipeline comprises Phase 3 through to discovery programs in inflammation, fibrosis, osteoarthritis and other indications. Galapagos' ambition is to become a leading global biopharmaceutical company focused on the discovery, development and commercialization of innovative medicines. More information at www.glpg.com.

Galapagos Contacts

Investors: Media: Elizabeth Goodwin Carmen Vroonen +1 781 460 1784 +32 473 824 874

Sofie Van Gijsel Evelyn Fox +32 485 19 14 15 +31 6 53 591 999

VP IR Senior Director Communications

Director IR Director Communications ir@glpg.com communications@glpg.com

¹ Belgian Act of 2 May 2007 on the disclosure of major shareholdings in issuers whose shares are admitted to trading on a regulated market.