Statement of Changes in Beneficial Ownership (4)

FORM 4 [X] Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES
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Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940

1. Name and Address of Reporting Person ^* GOLDMAN SACHS & CO. LLC	2. Issuer Name and Ticker or Trading Symbol Avantor, Inc. [ AVTR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director __X__ 10% Owner _____ Officer (give title below) _____ Other (specify below)
(Last) (First) (Middle) 200 WEST STREET	3. Date of Earliest Transaction (MM/DD/YYYY) 5/17/2019
(Street) NEW YORK, NY 10282 (City) (State) (Zip)	4. If Amendment, Date Original Filed (MM/DD/YYYY)	6. Individual or Joint/Group Filing (Check Applicable Line) ___ Form filed by One Reporting Person _ X _ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	3. Trans. Code (Instr. 8)		4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
1.Title of Security (Instr. 3)	2. Trans. Date	2A. Deemed Execution Date, if any	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	5/17/2019		P		13099	A	$14.00	67619397 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	5/17/2019		S		14049	D	$14.00	67605348 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	7/31/2019		P		55	A	$17.5476	72612230 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	7/31/2019		S		55	D	$17.5476	72612175 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	8/6/2019		P		88	A	$16.66	72614264.87 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	8/6/2019		S		88	D	$16.66	72614176.87 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	8/12/2019		P		16245	A	$16.5133	72632694 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	8/12/2019		S		16245	D	$16.5133	72616449 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	8/12/2019		P		9	A	$16.66	72616458 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	8/12/2019		S		9	D	$16.66	72616449 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/6/2019		P		67437	A	$16.5133	72683598 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/6/2019		S		67437	D	$16.5133	72616161 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/6/2019		P		49200	A	$17.0639	72665361 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/6/2019		S		49200	D	$17.0639	72616161 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/9/2019		P		149694	A	$16.4566	72773570.99 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/9/2019		S		149694	D	$16.4566	72623876.99 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		P		1768	A	$14.70	72621850.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		S		1768	D	$14.70	72620082.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		P		4146	A	$14.76	72624228.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		S		4146	D	$14.76	72620082.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		P		100	A	$14.775	72620182.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		S		100	D	$14.775	72620082.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		P		3800	A	$14.78	72623882.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		S		3800	D	$14.78	72620082.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		P		100	A	$14.785	72620182.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		S		100	D	$14.785	72620082.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		P		5164	A	$14.79	72625246.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		S		5164	D	$14.79	72620082.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		P		9922	A	$14.80	72630004.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾
Common Stock, par value $0.01 per share ⁽¹⁾⁽²⁾⁽³⁾	9/25/2019		S		9922	D	$14.80	72620082.41 ⁽⁴⁾⁽⁵⁾	I	See Footnotes ⁽⁴⁾⁽⁵⁾⁽⁶⁾⁽⁷⁾

*Table II - Derivative Securities Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)*
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	4. Trans. Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
1. Title of Derivate Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Trans. Date	3A. Deemed Execution Date, if any	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)			11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:
(1)	These transactions in the common stock (the "Common Stock") of Avantor, Inc. (the "Issuer") have not previously been reported on Form 4 and were effected by Goldman Sachs & Co. LLC ("Goldman Sachs") acting as agent on behalf of certain international affiliates that had entered into riskless principal trades in connection with client trade facilitation in the ordinary course of their business.
(2)	Without conceding riskless principal trades in connection with client trade facilitation in the ordinary course of business can result in liability under Section 16(b) of the Securities Exchange Act of 1934 (the "Exchange Act"), the amount of profit potentially recoverable by the Issuer from the reported transactions in the event that they were subject to Section 16(b) has been remitted to the Issuer.
(3)	This statement is being filed by The Goldman Sachs Group, Inc. ("GS Group"), Goldman Sachs, Broad Street Principal Investments, L.L.C. ("BSPI"), StoneBridge 2017, L.P. ("StoneBridge 2017"), StoneBridge 2017 Offshore, L.P. ("StoneBridge 2017 Offshore"), VWR Partners, L.P. ("VWR"), StoneBridge 2018, L.P. ("StoneBridge 2018"), StoneBridge 2018 Offshore, L.P. ("StoneBridge 2018 Offshore" and, together with StoneBridge 2017, StoneBridge 2017 Offshore, VWR and StoneBridge 2018, the "GS Funds") and Bridge Street Opportunity Advisors, L.L.C. ("Bridge Street"). GS Group, Goldman Sachs, BSPI, the GS Funds and Bridge Street are defined collectively as the "Reporting Persons".
(4)	Bridge Street is the sole general partner of each of the GS Funds and may be deemed to beneficially own shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds.
(5)	Goldman Sachs and GS Group may be deemed to beneficially own indirectly shares of Common Stock by reason of direct beneficial ownership of such shares by the GS Funds and BSPI. Bridge Street, the sole general partner of each of the GS Funds, is an indirect wholly-owned subsidiary of GS Group. Goldman Sachs is the manager of BSPI and Bridge Street, and the investment manager of each of the GS Funds. Goldman Sachs is a direct subsidiary of GS Group.
(6)	As of November 6, 2020, Goldman Sachs and GS Group may have been deemed to beneficially own indirectly, in the aggregate, 43,481,933 shares of the Common Stock of the Issuer by reason of the direct or indirect beneficial ownership of such shares as follows: (i) BSPI owned directly 10,507,085 shares of Common Stock, (ii) StoneBridge 2017 owned directly 683,221 shares of Common Stock, (iii) StoneBridge 2017 Offshore owned directly 315,779 shares of Common Stock, (iv) VWR owned directly 29,007,209 shares of Common Stock, (v) StoneBridge 2018 owned directly 2,089,674 shares of Common Stock and (vi) StoneBridge 2018 Offshore owned directly 878,965 shares of Common Stock.
(7)	Each of the Reporting Persons disclaims beneficial ownership of the securities reported herein except to the extent of its pecuniary interest therein, if any, and this report shall not be deemed an admission that any such Reporting Person is the beneficial owner of, or has any pecuniary interest in, such securities for purposes of Section 16 of the Exchange Act, or for any other purpose.

Remarks:
Balance of trades included in attached schedule. (See Exhibit 99.1)

Reporting Owners
Reporting Owner Name / Address	Relationships
Reporting Owner Name / Address	Director	10% Owner	Officer	Other
GOLDMAN SACHS & CO. LLC 200 WEST STREET NEW YORK, NY 10282		X
StoneBridge 2017, L.P. 200 WEST STREET NEW YORK, NY 10282-2198		X
StoneBridge 2017 Offshore, L.P. 200 WEST STREET NEW YORK, NY 10282-2198		X
VWR Partners, L.P. 200 WEST STREET NEW YORK, NY 10282		X
Broad Street Principal Investments, L.L.C. 200 WEST STREET NEW YORK, NY 10282		X
Bridge Street Opportunity Advisors, L.L.C. 200 WEST STREET NEW YORK, NY 10282		X
GOLDMAN SACHS GROUP INC 200 WEST STREET NEW YORK, NY 10282		X
StoneBridge 2018, L.P. 200 WEST STREE NEW YORK, NY 10282		X
StoneBridge 2018 Offshore, L.P. 200 WEST STREET NEW YORK, NY 10282		X

Signatures
Jamison Yardley, Attorney-in-fact		5/7/2021
^**Signature of Reporting Person		Date
Jamison Yardley, Attorney-in-fact		5/7/2021
^**Signature of Reporting Person		Date
Jamison Yardley, Attorney-in-fact		5/7/2021
^**Signature of Reporting Person		Date
Jamison Yardley, Attorney-in-fact		5/7/2021
^**Signature of Reporting Person		Date
Jamison Yardley, Attorney-in-fact		5/7/2021
^**Signature of Reporting Person		Date
Jamison Yardley, Attorney-in-fact		5/7/2021
^**Signature of Reporting Person		Date
Jamison Yardley, Attorney-in-fact		5/7/2021
^**Signature of Reporting Person		Date
Jamison Yardley, Attorney-in-fact		5/7/2021
^**Signature of Reporting Person		Date
Jamison Yardley, Attorney-in-fact		5/7/2021
^**Signature of Reporting Person		Date