CERT

SEC source: 0001104659-20-136437 · tm2038646-3_4seq1.xml · nonDerivative · entry 1

McLean Stephen M. · CIK 0001834266 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,000

F1 · kind: Shares were acquired in a directed share program in connection with the Issuer's initial public offering.

SEC source: 0001104659-20-136440 · tm2038646-5_4seq1.xml · nonDerivative · entry 1

EQT Avatar Parent L.P. · CIK 0001715533 · 10% owner

EQT Avatar Parent GP LLC · CIK 0001833933 · 10% owner

EQT Fund Management S.a r.l. · CIK 0001834239 · 10% owner

Joint disclosure: these amounts are not allocated separately to each reporting owner.

10b5-1 filing: Not disclosed

Ownership: Indirect · Held by EQT Avatar Parent L.P.

Disclosed balance after: 74,898,012

F1 · price: This amount represents the $23.00 initial public offering price per share of common stock of Certara, Inc., less the underwriting discount of $1.38 per share.

F2 · ownership.nature: 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.

SEC source: 0001104659-20-136447 · tm2038646-2_4seq1.xml · nonDerivative · entry 3

WALSH MATTHEW M · CIK 0001269428 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 172,901

F3 · kind: Shares were acquired in a directed share program in connection with the Issuer's initial public offering.

SEC source: 0001104659-20-136439 · tm2038646-4_4seq1.xml · nonDerivative · entry 3

CASHMAN JAMES E III · CIK 0001199440 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 476,723

F3 · kind: Shares were acquired in a directed share program in connection with the Issuer's initial public offering.

SEC source: 0001104659-20-136435 · tm2038646-1_4seq1.xml · nonDerivative · entry 3

Traynor Richard M. · CIK 0001834465 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 341,803

F3 · kind: Shares were acquired in a directed share program in connection with the Issuer's initial public offering.

SEC source: 0001104659-20-136447 · tm2038646-2_4seq1.xml · nonDerivative · entry 2

WALSH MATTHEW M · CIK 0001269428 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 167,901

F2 · kind: Represents restricted stock previously granted to the reporting person on December 10, 2020. These shares of restricted stock were already reflected on the reporting person's previously filed Form 3.

F2 · price: Represents restricted stock previously granted to the reporting person on December 10, 2020. These shares of restricted stock were already reflected on the reporting person's previously filed Form 3.

SEC source: 0001104659-20-136447 · tm2038646-2_4seq1.xml · nonDerivative · entry 1

WALSH MATTHEW M · CIK 0001269428 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 22,304

F1 · kind: Represents the receipt of shares of common stock of the Issuer from EQT Avatar Parent L.P. in exchange for units in EQT Avatar Parent L.P. previously held by the reporting person. These shares of common stock were already reflected on the reporting person's previously filed Form 3.

F1 · price: Represents the receipt of shares of common stock of the Issuer from EQT Avatar Parent L.P. in exchange for units in EQT Avatar Parent L.P. previously held by the reporting person. These shares of common stock were already reflected on the reporting person's previously filed Form 3.

SEC source: 0001104659-20-136439 · tm2038646-4_4seq1.xml · nonDerivative · entry 2

CASHMAN JAMES E III · CIK 0001199440 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 456,723

F2 · kind: Represents restricted stock previously granted to the reporting person on December 10, 2020. These shares of restricted stock were already reflected on the reporting person's previously filed Form 3.

F2 · price: Represents restricted stock previously granted to the reporting person on December 10, 2020. These shares of restricted stock were already reflected on the reporting person's previously filed Form 3.

SEC source: 0001104659-20-136439 · tm2038646-4_4seq1.xml · nonDerivative · entry 1

CASHMAN JAMES E III · CIK 0001199440 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 318,944

F1 · kind: Represents the receipt of shares of common stock of the Issuer from EQT Avatar Parent L.P. in exchange for units in EQT Avatar Parent L.P. previously held by the reporting person. These shares of common stock were already reflected on the reporting person's previously filed Form 3.

F1 · price: Represents the receipt of shares of common stock of the Issuer from EQT Avatar Parent L.P. in exchange for units in EQT Avatar Parent L.P. previously held by the reporting person. These shares of common stock were already reflected on the reporting person's previously filed Form 3.

SEC source: 0001104659-20-136435 · tm2038646-1_4seq1.xml · nonDerivative · entry 2

Traynor Richard M. · CIK 0001834465 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 341,558

F2 · kind: Represents restricted stock previously granted to the reporting person on December 10, 2020. These shares of restricted stock were already reflected on the reporting person's previously filed Form 3.

F2 · price: Represents restricted stock previously granted to the reporting person on December 10, 2020. These shares of restricted stock were already reflected on the reporting person's previously filed Form 3.

SEC source: 0001104659-20-136435 · tm2038646-1_4seq1.xml · nonDerivative · entry 1

Traynor Richard M. · CIK 0001834465 · SVP and General Counsel

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 117,525

F1 · kind: Represents the receipt of shares of common stock of the Issuer from EQT Avatar Parent L.P. in exchange for units in EQT Avatar Parent L.P. previously held by the reporting person. These shares of common stock were already reflected on the reporting person's previously filed Form 3.

F1 · price: Represents the receipt of shares of common stock of the Issuer from EQT Avatar Parent L.P. in exchange for units in EQT Avatar Parent L.P. previously held by the reporting person. These shares of common stock were already reflected on the reporting person's previously filed Form 3.