Galapagos NV — Major Shareholding Notification 2019

Oct 8, 2019

Galapagos receives transparency notification from Wellington Management Group LLP

Mechelen, Belgium; 7 October 2019; 22:01 CET; regulated information – Galapagos NV (Euronext & NASDAQ: GLPG) received a transparency notification from Wellington Management Group LLP.

Pursuant to Belgian transparency legislation¹ , Galapagos received a transparency notification on 4 October 2019 from Wellington Management Group LLP, who notified that the 3,445,603 Galapagos shares held by its entirely-controlled subsidiary Wellington Management Company LLP on 1 October 2019 represent 5.56% of the current 61,953,831 outstanding Galapagos shares. Wellington Management Company LLP thus crossed above the 5% threshold of Galapagos' voting rights by purchase of voting securities on 1 October 2019. 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