SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
X	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* EQT Avatar Parent L.P. (Last) (First) (Middle) C/O EQT PARTNERS 1114 AVENUE OF THE AMERICAS, 45TH FLOOR (Street) NEW YORK, NY 10036 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Certara, Inc. [ CERT ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 03/29/2021
	4. If Amendment, Date of Original Filed (Month/Day/Year)	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. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction 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)
			Code	V	Amount	(A) or (D)	Price
Common Stock	03/29/2021		S		8,674,151	D	$24.125(1)	66,223,861	I	Held by EQT Avatar Parent L.P.(2)

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction 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 (Month/Day/Year)		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: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

1. Name and Address of Reporting Person* EQT Avatar Parent L.P. (Last) (First) (Middle) C/O EQT PARTNERS 1114 AVENUE OF THE AMERICAS, 45TH FLOOR (Street) NEW YORK, NY 10036 (City) (State) (Zip)

1. Name and Address of Reporting Person* EQT Avatar Parent GP LLC (Last) (First) (Middle) C/O EQT PARTNERS 1114 AVENUE OF THE AMERICAS, 45TH FLOOR (Street) NEW YORK NY 10036 (City) (State) (Zip)

1. Name and Address of Reporting Person* EQT Fund Management S.a r.l. (Last) (First) (Middle) 26A, BOULEVARD ROYAL, LUXEMBOURG (Street) GRAND DUCHY OF LUXEMBOURG N4 L-2449 (City) (State) (Zip)

Explanation of Responses:

1. This amount represents the $25.00 secondary public offering price per share of common stock of Certara, Inc., less the underwriting discount of $0.875 per share.

2. Consists of shares of common stock held directly by EQT Avatar Parent L.P. ("EQT Investor"). EQT Avatar Parent GP LLC ("Avatar Parent GP") is the general partner of the EQT Investor. Several investment vehicles collectedly make up the fund known as "EQT VII." EQT VII owns 100% of the membership interests in Avatar Parent GP. EQT Fund Management S.a r.l. ("EFMS") has exclusive responsibility for the management and control of the business and affairs of investment vehicles which constitute the majority of the total commitments to EQT VII. As such, EFMS has the power to control Avatar Parent GP's voting and investment decisions and may be deemed to have beneficial ownership of the securities held by the EQT Investor.

	EQT Avatar Parent L.P., By: EQT Avatar Parent GP LLC, as its general partner, By: /s/ Ethan Waxman, Name: Ethan Waxman Title: Vice President	03/30/2021
	EQT Avatar Parent GP LLC, By: /s/ Ethan Waxman, Name: Ethan Waxman Title: Vice President	03/30/2021
	EQT Fund Management S.a r.l., By: /s/ Nicholas Curwen, Name: Nicholas Curwen Title: Manager and /s/ Joshua Stone, Name: Joshua Stone Title: Manager	03/30/2021
	** Signature of Reporting Person	Date
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* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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