AVANTOR, INC.

Radnor Corporate Center

Building One, Suite 200

100 Matsonford Road

Radnor, Pennsylvania 19087

May 14, 2019

VIA EDGAR TRANSMISSION

 

		Re:		Avantor, Inc.
				Registration Statement on Form S-1 (File No. 333-229578)

Securities and Exchange Commission

Division of Corporation Finance

100 F Street, N.E.

Washington, D.C. 20549

Attention: Tim Buchmiller

Amanda Ravitz

Ladies and Gentlemen:

Pursuant to Rule 461 under the Securities Act of 1933, as amended, Avantor, Inc. (the “Company”) hereby requests that the effective date of the above-referenced Registration Statement be accelerated so that it may become effective at 4:00 p.m., Washington, D.C. time, on May 16, 2019, or as soon as practicable thereafter.

If you require any additional information with respect to this letter, please contact Joseph H. Kaufman (212-455-2948) of Simpson Thacher & Bartlett LLP.

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