	ASML Holding N.V.

	De Run 6501
	5504 DR Veldhoven
	P.O. Box 324
	5500 AH Veldhoven
	The Netherlands


	Phone +31-40-2683444
	Fax +31-40-268-4888
	robert.roelofs@asml.com
	www.asml.com

	Trade Register 17085815
	Eindhoven, The Netherlands

United States Securities and Exchange Commission

450 Fifth Street N.W.

Washington, DC 20549

United States of America

Date: September 19, 2018

Subject: Form S-8

Ladies and Gentlemen:

I refer to the Registration Statement on Form S-8 (the “Registration Statement”) of ASML Holding N.V., a Netherlands corporation (the “Company”), under the Securities Act of 1933 (the “Securities Act”). The Registration Statement relates to up to 2,043,000 ordinary shares, nominal value €0.09 per share, of the Company (the “Securities”), issuable and issued under the ASML Board of Management Umbrella Share Plan, ASML Employee Umbrella Share Plan and the ASML Share and Option Purchase Plan (collectively the “Plans”).

I have examined and am familiar with (i) the Company’s Articles of Association, as amended, and (ii) the corporate proceedings relating to the Registration Statement. Upon the basis of the foregoing, and having satisfied myself as to such other matters of law and fact as I consider relevant for the purposes of this opinion, I advise you that, in my opinion, upon issuance in accordance with the terms and conditions of the Plans, the Securities will have been legally issued, fully paid and non-assessable.

I express no opinion herein, on or with respect to, any law other than the laws of The Netherlands, and I express no opinion on, or with respect to, the laws of the United States, any state thereof or any other laws, statutes, regulations or ordinances.

I hereby consent to the filing of this opinion as an exhibit to the Registration Statement and any reference to me therein. In giving such consent, I do not hereby admit that I am in the category of persons whose consent is required under Section 7 of the Securities Act or the rules and regulations of the Commission.

	Very truly yours,


	/s/ Robert F. Roelofs
	Robert F. Roelofs
	General Counsel
	ASML Holding N.V.