Indicate by check mark whether the registrant files or will file annual reports under cover of Form 20-F or Form 40-F.
Form 20-F [ X ]      Form 40-F [   ]

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):    

Note: Regulation S-T Rule 101(b)(1) only permits the submission in paper of a Form 6-K if submitted solely to provide an attached annual report to security holders.

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):     

Note: Regulation S-T Rule 101(b)(7) only permits the submission in paper of a Form 6-K if submitted to furnish a report or other document that the registrant foreign private issuer must furnish and make public under the laws of the jurisdiction in which the registrant is incorporated, domiciled or legally organized (the registrant's "home country"), or under the rules of the home country exchange on which the registrant's securities are traded, as long as the report or other document is not a press release, is not required to be and has not been distributed to the registrant's security holders, and, if discussing a material event, has already been the subject of a Form 6-K submission or other Commission filing on EDGAR. 

The information contained in this report on Form 6-K, including the Exhibit 99.1, except for the quote of Mr. Onno van de Stolpe contained in Exhibit 99.1, is hereby incorporated by reference into the Company's Registration Statements on Forms F-3 (File No. 333-211765) and S-8 (File Nos. 333-204567, 333-208697, 333-211834, 333-215783, and 333-218160).

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On December 11, 2017, the Registrant issued a press release, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

(c) Exhibit 99.1. Press release dated December 11, 2017

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SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

		GALAPAGOS NV
		(Registrant)
Date: December 12, 2017		/s/ Xavier Maes
		Xavier Maes
		Company Secretary

EXHIBIT 99.1

Galapagos to enter NASDAQ Biotech Index

Mechelen, Belgium; 11 December 2017; 7.30 CET - Galapagos NV (Euronext & NASDAQ: GLPG) announces that it will be included in NASDAQ Biotech Index on NASDAQ, effective 18 December 2017.

The NASDAQ Biotech Index (NBI) comprises of eligible biotechnology and pharmaceutical companies listed on NASDAQ, meeting trading and market capitalization criteria. For more information: https://indexes.nasdaqomx.com/Index/Overview/NBI.

"We are pleased that Galapagos joins the NBI. This reflects the increased trading liquidity of our ADRs on NASDAQ and the increased exposure among US investors," says Onno van de Stolpe, CEO and founder.

About Galapagos

Galapagos (Euronext & NASDAQ: GLPG) is a clinical-stage biotechnology company specialized in the discovery and development of small molecule medicines with novel modes of action. Galapagos' pipeline comprises Phase 3 through to discovery programs in cystic fibrosis, inflammation, fibrosis, osteoarthritis and other indications. Our target discovery platform has delivered three novel mechanisms showing promising patient results in, respectively, inflammatory diseases, idiopathic fibrosis and atopic dermatitis. Galapagos is focused on the development and commercialization of novel medicines that will improve people's lives. The Galapagos group, including fee-for-service subsidiary Fidelta, has approximately 578 employees, operating from its Mechelen, Belgium headquarters and facilities in the Netherlands, France, Switzerland, the US and Croatia. More information at www.glpg.com.

Contacts

Investors:

Elizabeth Goodwin, VP IR & Corporate Communications

+1 781 460 1784

Paul van der Horst, Director IR & Business Development

+31 71 750 6707

ir@glpg.com

Media:

Evelyn Fox, Director Communications

+31 6 53 591 999

communications@glpg.com

Forward-looking statements

This release may contain forward-looking statements. Such forward-looking statements are not guarantees of future results. These forward-looking statements speak only as of the date of publication of this document. Galapagos expressly disclaims any obligation to update any forward-looking statements in this document, unless specifically required by law or regulation.