Feehery William F

SEC source: 0000105770-26-000058 · form4.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,519.345

F1 · shares: These shares of restricted stock units will vest in full on the date of the next annual shareholder meeting and will be distributable under the terms of the Deferred Compensation Plan for Outside Directors.

SEC source: 0001543193-25-000005 · form4-11122025_091151.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,360,769.384

SEC source: 0001415889-25-014159 · form4-05222025_080541.xml · derivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 187,144

Underlying: Common Stock · 187,144 shares

Expires 2028-04-01

F2 · derivative.exercise_price: Each restricted stock unit ("RSU") was granted on May 20, 2025, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. The RSUs will vest and settle in three equal installments on April 1, 2026, April 1, 2027, and April 1, 2028.

F2 · derivative.exercise_date: Each restricted stock unit ("RSU") was granted on May 20, 2025, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. The RSUs will vest and settle in three equal installments on April 1, 2026, April 1, 2027, and April 1, 2028.

SEC source: 0001415889-25-014159 · form4-05222025_080541.xml · derivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 280,716

Underlying: Common Stock · 280,716 shares

Expires not disclosed

F1 · derivative.exercise_price: Each Certara, Inc. ("Company") performance stock unit ("PSU") was granted on May 20, 2025, pursuant to the terms of the 2025 Long-Term Incentive Plan for Company executives approved by the Compensation Committee of the Company's Board of Directors, under the Certara 2020 Incentive Plan (the "2020 Incentive Plan"). Each PSU represents a conditional right to receive one share of Company common stock. The reporting person will be entitled to receive a number of shares between 0% and 200% of the target amount reported based on the Company's performance against certain total shareholder return thresholds through the period ending on March 31, 2028.

F1 · derivative.exercise_date: Each Certara, Inc. ("Company") performance stock unit ("PSU") was granted on May 20, 2025, pursuant to the terms of the 2025 Long-Term Incentive Plan for Company executives approved by the Compensation Committee of the Company's Board of Directors, under the Certara 2020 Incentive Plan (the "2020 Incentive Plan"). Each PSU represents a conditional right to receive one share of Company common stock. The reporting person will be entitled to receive a number of shares between 0% and 200% of the target amount reported based on the Company's performance against certain total shareholder return thresholds through the period ending on March 31, 2028.

F1 · derivative.expiration_date: Each Certara, Inc. ("Company") performance stock unit ("PSU") was granted on May 20, 2025, pursuant to the terms of the 2025 Long-Term Incentive Plan for Company executives approved by the Compensation Committee of the Company's Board of Directors, under the Certara 2020 Incentive Plan (the "2020 Incentive Plan"). Each PSU represents a conditional right to receive one share of Company common stock. The reporting person will be entitled to receive a number of shares between 0% and 200% of the target amount reported based on the Company's performance against certain total shareholder return thresholds through the period ending on March 31, 2028.

SEC source: 0001127602-25-013696 · form4.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,363.13

F1 · shares: These shares of restricted stock units will vest in full on the date of the next annual shareholder meeting and will be distributable under the terms of the Deferred Compensation Plan for Outside Directors.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · derivative · entry 11

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 83,186

Underlying: Common Stock · 41,593 shares

Expires 2027-04-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each RSU was granted on April 1, 2024, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2025. The remaining two-thirds of the RSUs will vest and settle in equal parts on April 1, 2026 and April 1, 2027.

F5 · derivative.exercise_date: Each RSU was granted on April 1, 2024, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2025. The remaining two-thirds of the RSUs will vest and settle in equal parts on April 1, 2026 and April 1, 2027.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · derivative · entry 10

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,220

Underlying: Common Stock · 33,220 shares

Expires 2026-04-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each RSU was granted on April 1, 2023, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2024. One-third of the RSUs vested and were settled on April 1, 2025. The remaining one-third of the RSUs are scheduled to vest and settle on April 1, 2026.

F4 · derivative.exercise_date: Each RSU was granted on April 1, 2023, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2024. One-third of the RSUs vested and were settled on April 1, 2025. The remaining one-third of the RSUs are scheduled to vest and settle on April 1, 2026.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · derivative · entry 9

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 36,580 shares

Expires 2025-04-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each RSU was granted on April 1, 2022, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on March 31, 2023. One-third of the RSUs vested and were settled on April 1, 2024. The remaining one-third of the RSUs vested and settled on April 1, 2025.

F3 · derivative.exercise_date: Each RSU was granted on April 1, 2022, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on March 31, 2023. One-third of the RSUs vested and were settled on April 1, 2024. The remaining one-third of the RSUs vested and settled on April 1, 2025.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · nonDerivative · entry 8

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,336,673

F2 · shares: Represents shares of Certara withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units ("RSUs") and PSUs described in footnotes 1, 3, 4, and 5, exempt under Rule 16b-3.

F5 · price: Each RSU was granted on April 1, 2024, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2025. The remaining two-thirds of the RSUs will vest and settle in equal parts on April 1, 2026 and April 1, 2027.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · nonDerivative · entry 7

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,354,346

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · price: Each RSU was granted on April 1, 2024, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2025. The remaining two-thirds of the RSUs will vest and settle in equal parts on April 1, 2026 and April 1, 2027.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · nonDerivative · entry 6

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,312,753

F2 · shares: Represents shares of Certara withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units ("RSUs") and PSUs described in footnotes 1, 3, 4, and 5, exempt under Rule 16b-3.

F4 · price: Each RSU was granted on April 1, 2023, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2024. One-third of the RSUs vested and were settled on April 1, 2025. The remaining one-third of the RSUs are scheduled to vest and settle on April 1, 2026.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · nonDerivative · entry 5

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,326,869

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · price: Each RSU was granted on April 1, 2023, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2024. One-third of the RSUs vested and were settled on April 1, 2025. The remaining one-third of the RSUs are scheduled to vest and settle on April 1, 2026.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · nonDerivative · entry 4

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,293,649

F2 · shares: Represents shares of Certara withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units ("RSUs") and PSUs described in footnotes 1, 3, 4, and 5, exempt under Rule 16b-3.

F3 · price: Each RSU was granted on April 1, 2022, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on March 31, 2023. One-third of the RSUs vested and were settled on April 1, 2024. The remaining one-third of the RSUs vested and settled on April 1, 2025.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · nonDerivative · entry 3

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,307,456

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · price: Each RSU was granted on April 1, 2022, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on March 31, 2023. One-third of the RSUs vested and were settled on April 1, 2024. The remaining one-third of the RSUs vested and settled on April 1, 2025.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · nonDerivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,270,876

F2 · shares: Represents shares of Certara withheld to satisfy tax withholding obligations in connection with the vesting of restricted stock units ("RSUs") and PSUs described in footnotes 1, 3, 4, and 5, exempt under Rule 16b-3.

F1 · price: Each performance stock unit ("PSU") was granted on April 1, 2022, under the Certara, Inc. ("Certara") 2020 Incentive Plan (the "2020 Incentive Plan") and represents a right to receive one share of common stock. The PSUs were subject to the achievement of certain performance objectives over a three-year period from January 1, 2022, to December 31, 2024. The PSUs were vested and settled on April 1, 2025.

SEC source: 0001415889-25-009967 · form4-04032025_080412.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,279,114

F1 · price: Each performance stock unit ("PSU") was granted on April 1, 2022, under the Certara, Inc. ("Certara") 2020 Incentive Plan (the "2020 Incentive Plan") and represents a right to receive one share of common stock. The PSUs were subject to the achievement of certain performance objectives over a three-year period from January 1, 2022, to December 31, 2024. The PSUs were vested and settled on April 1, 2025.

SEC source: 0001127602-24-013398 · form4.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,292.13

F1 · shares: These shares of restricted stock units will vest in full on the date of the next annual shareholder meeting and will be distributable under the terms of the Deferred Compensation Plan for Outside Directors.

SEC source: 0001415889-24-010031 · form4-04032024_080419.xml · derivative · entry 8

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 120,981

Underlying: Common Stock · 120,981 shares

Expires 2027-04-01

F6 · derivative.exercise_price: Each RSU was granted on April 1, 2024, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. The RSUs will vest and settle in three equal installments on April 1, 2025, April 1, 2026 and April 1, 2027.

F6 · derivative.exercise_date: Each RSU was granted on April 1, 2024, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. The RSUs will vest and settle in three equal installments on April 1, 2025, April 1, 2026 and April 1, 2027.

SEC source: 0001415889-24-010031 · form4-04032024_080419.xml · derivative · entry 7

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,440

Underlying: Common Stock · 33,219 shares

Expires 2026-04-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each RSU was granted on April 1, 2023, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2024. The remaining two-thirds of the RSUs are scheduled to vest and settle in equal parts on April 1, 2025 and April 1, 2026.

F5 · derivative.exercise_date: Each RSU was granted on April 1, 2023, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2024. The remaining two-thirds of the RSUs are scheduled to vest and settle in equal parts on April 1, 2025 and April 1, 2026.

SEC source: 0001415889-24-010031 · form4-04032024_080419.xml · derivative · entry 6

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 36,580

Underlying: Common Stock · 36,580 shares

Expires 2025-04-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · derivative.exercise_price: Each RSU was granted on April 1, 2022, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on March 31, 2023. One-third of the RSUs vested and were settled on April 1, 2024. The remaining one-third of the RSUs are scheduled to vest and settle on April 1, 2025.

F4 · derivative.exercise_date: Each RSU was granted on April 1, 2022, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on March 31, 2023. One-third of the RSUs vested and were settled on April 1, 2024. The remaining one-third of the RSUs are scheduled to vest and settle on April 1, 2025.

SEC source: 0001415889-24-010031 · form4-04032024_080419.xml · nonDerivative · entry 5

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,249,154

F2 · shares: Represents RSUs of Certara withheld to satisfy tax withholding obligations in connection with the vesting of RSUs described in footnotes, 1, 4, and 5, exempt under Rule 16b-3.

SEC source: 0001415889-24-010031 · form4-04032024_080419.xml · nonDerivative · entry 4

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,263,269

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · price: Each RSU was granted on April 1, 2023, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2024. The remaining two-thirds of the RSUs are scheduled to vest and settle in equal parts on April 1, 2025 and April 1, 2026.

SEC source: 0001415889-24-010031 · form4-04032024_080419.xml · nonDerivative · entry 3

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,230,050

F2 · shares: Represents RSUs of Certara withheld to satisfy tax withholding obligations in connection with the vesting of RSUs described in footnotes, 1, 4, and 5, exempt under Rule 16b-3.

SEC source: 0001415889-24-010031 · form4-04032024_080419.xml · nonDerivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,245,593

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F4 · price: Each RSU was granted on April 1, 2022, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on March 31, 2023. One-third of the RSUs vested and were settled on April 1, 2024. The remaining one-third of the RSUs are scheduled to vest and settle on April 1, 2025.

SEC source: 0001415889-24-010031 · form4-04032024_080419.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,209,013

F1 · kind: Each RSU was granted on April 1, 2021, under the Certara, Inc. ("Certara") 2020 Incentive Plan (the "2020 Incentive Plan") and represents the right to receive one share of common stock or the cash equivalent. One-third of the RSUs vested and were settled on April 1, 2022. One-third of the RSUs vested and were settled on March 31, 2023. The remaining one-third of the RSUs vested and were settled on April 1, 2024.

F2 · shares: Represents RSUs of Certara withheld to satisfy tax withholding obligations in connection with the vesting of RSUs described in footnotes, 1, 4, and 5, exempt under Rule 16b-3.

F3 · balance_after: The total reported in Column 5 includes 30,525 RSUs which was previously reported in Table 1 of Form 4.

SEC source: 0001415889-24-010404 · form4a-04052024_080451.xml · derivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 124,779

Underlying: Common Stock · 124,779 shares

Expires 2027-04-01

F1 · derivative.exercise_price: The original Form 4, filed on April 3, 2024, is being amended by this Form 4 amendment solely to correct an administrative error, which misreported that 120,981 restricted stock units ("RSUs") were granted on April 1, 2024, when in fact, 124,779 RSUs were granted. As a result of this update, the number of shares beneficially owned by the reporting person following such transaction has been correspondingly increased by 3,798 shares. As previously disclosed, each RSU was granted on April 1, 2024, under the Certara, Inc. 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. The RSUs will vest and settle in three equal installments on April 1, 2025, April 1, 2026, and April 1, 2027.

F1 · shares: The original Form 4, filed on April 3, 2024, is being amended by this Form 4 amendment solely to correct an administrative error, which misreported that 120,981 restricted stock units ("RSUs") were granted on April 1, 2024, when in fact, 124,779 RSUs were granted. As a result of this update, the number of shares beneficially owned by the reporting person following such transaction has been correspondingly increased by 3,798 shares. As previously disclosed, each RSU was granted on April 1, 2024, under the Certara, Inc. 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. The RSUs will vest and settle in three equal installments on April 1, 2025, April 1, 2026, and April 1, 2027.

F1 · derivative.exercise_date: The original Form 4, filed on April 3, 2024, is being amended by this Form 4 amendment solely to correct an administrative error, which misreported that 120,981 restricted stock units ("RSUs") were granted on April 1, 2024, when in fact, 124,779 RSUs were granted. As a result of this update, the number of shares beneficially owned by the reporting person following such transaction has been correspondingly increased by 3,798 shares. As previously disclosed, each RSU was granted on April 1, 2024, under the Certara, Inc. 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent. The RSUs will vest and settle in three equal installments on April 1, 2025, April 1, 2026, and April 1, 2027.

SEC source: 0001415889-24-007042 · form4-03062024_090352.xml · nonDerivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,221,984

F2 · kind: Represents shares of the issuer withheld to satisfy tax withholding obligations in connection with the vesting of PSUs described in footnote 1.

SEC source: 0001415889-24-007042 · form4-03062024_090352.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,239,541

F1 · price: Each performance stock unit ("PSU") was granted on April 1, 2021, under the Certara, Inc. 2020 Incentive Plan and represents a right to receive one share of common stock. The PSUs are subject to the achievement of certain performance objectives over a three-year period from January 1, 2021 to December 31, 2023. The PSUs were vested and settled on March 5, 2024.

SEC source: 0001562180-23-003692 · primarydocument.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 29,728.13

F1 · price: These shares of restricted stock units will vest in full on the first anniversary of the date of the grant and will be distributable under the terms of the Deferred Compensation Plan for Outside Directors.

SEC source: 0001415889-23-005797 · form4-04032023_080444.xml · derivative · entry 5

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 99,659

Underlying: Common Stock · 99,659 shares

Expires 2026-04-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_price: Each RSU was granted on April 1, 2023, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent thereof. The RSUs will vest and settle in three equal installments on April 1, 2024, April 1, 2025, and April 1, 2026.

F5 · derivative.exercise_date: Each RSU was granted on April 1, 2023, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent thereof. The RSUs will vest and settle in three equal installments on April 1, 2024, April 1, 2025, and April 1, 2026.

SEC source: 0001415889-23-005797 · form4-04032023_080444.xml · derivative · entry 4

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,160

Underlying: Common Stock · 36,580 shares

Expires 2025-04-01

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_price: Each RSU was granted on April 1, 2022, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent thereof. One-third of the RSUs vested and were settled on March 31, 2023. The remaining two-thirds of the RSUs are scheduled to vest and settle in two equal installments on April 1, 2024, and April 1, 2025.

F3 · derivative.exercise_date: Each RSU was granted on April 1, 2022, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent thereof. One-third of the RSUs vested and were settled on March 31, 2023. The remaining two-thirds of the RSUs are scheduled to vest and settle in two equal installments on April 1, 2024, and April 1, 2025.

SEC source: 0001415889-23-005797 · form4-04032023_080444.xml · nonDerivative · entry 3

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,179,742

F4 · shares: Represents RSUs withheld to satisfy the tax withholding obligations in connection with the vesting and settlement of RSUs, exempt under Rule 16b-3.

F2 · balance_after: The total reported in Column 5 includes 30,525 RSUs which was previously reported in Table 1 of Form 4.

SEC source: 0001415889-23-005797 · form4-04032023_080444.xml · nonDerivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,195,285

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · shares: Each RSU was granted on April 1, 2022, under the 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent thereof. One-third of the RSUs vested and were settled on March 31, 2023. The remaining two-thirds of the RSUs are scheduled to vest and settle in two equal installments on April 1, 2024, and April 1, 2025.

F2 · balance_after: The total reported in Column 5 includes 30,525 RSUs which was previously reported in Table 1 of Form 4.

SEC source: 0001415889-23-005797 · form4-04032023_080444.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,158,705

F1 · shares: Represents restricted stock units ("RSUs") withheld to satisfy the tax withholding obligations in connection with the vesting and settlement of RSUs, exempt under Rule 16b-3. Each RSUs was granted on April 1, 2021, under the Certara, Inc. 2020 Incentive Plan (the "2020 Incentive Plan") and represents a right to receive one share of common stock or the cash equivalent thereof. One-third of the RSUs vested and were settled on April 1, 2022. One-third of the RSUs vested and were on March 31, 2023. The remaining one-third of the RSUs are scheduled to vest and settle on April 1, 2024.

F2 · balance_after: The total reported in Column 5 includes 30,525 RSUs which was previously reported in Table 1 of Form 4.

SEC source: 0001562180-22-004432 · primarydocument.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 29,112.13

F1 · price: These shares of restricted stock units will vest in full on the first anniversary of the date of grant and will be distributable under the terms of the Deferred Compensation Plan for Outside Directors.

SEC source: 0001415889-22-003834 · form4-04052022_010426.xml · derivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 109,740

Underlying: Common Stock · 109,740 shares

Expires 2025-04-01

F3 · derivative.exercise_price: Each RSU is granted under the Certara, Inc. 2020 Incentive Plan and represents a right to receive one share of common stock or the cash equivalent thereof. The reporting person has reported prior awards of RSUs in Table 1 of Form 4.

F4 · derivative.exercise_date: The RSUs will vest and settle in three equal installments on April 1, 2023, April 1, 2024 and April 1, 2025.

SEC source: 0001415889-22-003834 · form4-04052022_010426.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,168,796

F1 · shares: Represents restricted stock units ("RSU") withheld to satisfy tax withholding obligations in connection with the vesting and settlement of 30,525 RSUs, previously granted to the reporting person on April 1, 2021. The remaining two-thirds of the RSUs are scheduled to vest and settle in two equal installments on April 1, 2023 and April 1, 2024.

F2 · balance_after: The total reported in Column 5 includes 2,107,746 shares of common stock and 61,050 RSUs, each of which was previously reported in Table 1 of Form 4. Does not include 109,740 newly-awarded RSUs which are reported in Table II.

SEC source: 0001415889-22-003130 · form4-03172022_010315.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,178,051

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 15, 2021.

F2 · price: This transaction was executed in multiple trades at prices ranging from $20.00 to $20.33. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-22-002931 · form4-03142022_010329.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,240,536

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 15, 2021.

F2 · price: This transaction was executed in multiple trades at prices ranging from $20.04 to $20.41. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-22-001632 · form4-02222022_010223.xml · nonDerivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,268,051

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on on March 24, 2021.

F3 · price: This transaction was executed in multiple trades at prices ranging from $23.80 to $24.09. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-22-001632 · form4-02222022_010223.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,272,757

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on on March 24, 2021.

F2 · price: This transaction was executed in multiple trades at prices ranging from $22.79 to $23.79. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-22-001598 · form4-02222022_050246.xml · nonDerivative · entry 3

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,343,051

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 15, 2021.

F4 · price: This transaction was executed in multiple trades at prices ranging from $25.38 to $25.72. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-22-001598 · form4-02222022_050246.xml · nonDerivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,349,569

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 15, 2021.

F3 · price: (3) This transaction was executed in multiple trades at prices ranging from $24.37 to $25.37. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-22-001598 · form4-02222022_050246.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,379,644

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 15, 2021.

F2 · price: This transaction was executed in multiple trades at prices ranging from $23.36 to $24.36. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-22-000797 · form4-01272022_010151.xml · nonDerivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,433,051

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 24, 2021.

F3 · price: This transaction was executed in multiple trades at prices ranging from $25.43 to $26.19. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-22-000797 · form4-01272022_010151.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,484,247

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 24, 2021.

F2 · price: This transaction was executed in multiple trades at prices ranging from $24.42 to $25.42. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-21-006207 · form4-12232021_011241.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,508,051

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on March 24, 2021.

F2 · price: This transaction was executed in multiple trades at prices ranging from $28.06 to $28.99. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-21-005782 · form4-12082021_011255.xml · nonDerivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,583,051

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.

F3 · price: This transaction was executed in multiple trades at prices ranging from $27.72 to $28.15. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-21-005782 · form4-12082021_011255.xml · nonDerivative · entry 1

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,637,900

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.

F2 · price: This transaction was executed in multiple trades at prices ranging from $26.72 to $27.71. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.

SEC source: 0001415889-21-005731 · form4-12062021_011244.xml · nonDerivative · entry 2

Feehery William F · CIK 0001543193 · Director · CHIEF EXECUTIVE OFFICER

10b5-1 filing: Not disclosed

Ownership: Direct

Disclosed balance after: 2,653,051

F1 · kind: The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan previously adopted by the Reporting Person.

F3 · price: This transaction was executed in multiple trades at prices ranging from $26.38 to $27.03. The price reported above reflects the weighted average sale price. The Reporting Person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.