John E. Gallagher - 01 Apr 2026 Form 4 Insider Report for Certara, Inc. (CERT)

Reporting relationship: Chief Financial Officer
Issuer ticker: CERT
Reported as of: 01 Apr 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 03 Apr 2026, 16:07:30 UTC
Prior SEC filing: 22 May 2025
Next SEC filing: 13 May 2026
Source filing: View source filing
Reporting owner signature: /s/ Daniel Corcoran, as Attorney-in-Fact for John E. Gallagher

Key filing fact

John E. Gallagher filed Form 4 for Certara, Inc. (CERT) on 03 Apr 2026.

Key facts

This page summarizes John E. Gallagher's Form 4 filing for Certara, Inc. (CERT).
11 reported transactions and 3 derivative rows are listed below.
Accepted by SEC: 03 Apr 2026, 16:07.

Change

Previous filing in this sequence was filed on 22 May 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001628991 Primary reporting owner

Gallagher John E

Relationship: Chief Financial Officer
Address: C/O CERRTARA, INC., 4 RADNOR CORPORATE CENTER, SUITE 350, RADNOR
Signature: /s/ Daniel Corcoran, as Attorney-in-Fact for John E. Gallagher
Signature date: 03 Apr 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CERT transaction

Common Stock

Award

Transaction value
Shares: +23,346
Change %: +50%
Price: $0.000000^*
Shares after: 69,874
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F1

CERT transaction

Common Stock

Tax liability

Transaction value
Shares: -7,775
Change %: -11%
Price: $5.70^*
Shares after: 62,099
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F1, F2

CERT transaction

Common Stock

Options Exercise

Transaction value
Shares: +12,633
Change %: +20%
Price: $0.000000^*
Shares after: 74,732
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F3

CERT transaction

Common Stock

Tax liability

Transaction value
Shares: -4,327
Change %: -5.8%
Price: $0.000000^*
Shares after: 70,405
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F2, F3

CERT transaction

Common Stock

Options Exercise

Transaction value
Shares: +15,190
Change %: +22%
Price: $0.000000^*
Shares after: 85,595
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F4

CERT transaction

Common Stock

Tax liability

Transaction value
Shares: -5,203
Change %: -6.1%
Price: $5.70^*
Shares after: 80,392
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F2, F4

CERT transaction

Common Stock

Options Exercise

Transaction value
Shares: +22,782
Change %: +28%
Price: $0.000000^*
Shares after: 103,174
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F5

CERT transaction

Common Stock

Tax liability

Transaction value
Shares: -7,803
Change %: -7.6%
Price: $5.70^*
Shares after: 95,371
Date: 01 Apr 2026
Ownership: Direct
Footnotes: F2, F5

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CERT transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -12,633
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 01 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 12,633
Exercise price
Footnotes: F3

CERT transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -15,190
Change %: -50%
Price: $0.000000^*
Shares after: 15,191
Date: 01 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 15,190
Exercise price
Footnotes: F4

CERT transaction Derivative

Restricted Stock Units

Options Exercise

Transaction value
Shares: -22,782
Change %: -33%
Price: $0.000000^*
Shares after: 45,566
Date: 01 Apr 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 22,782
Exercise price
Footnotes: F5

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 5 footnotes

Footnote F1

Each performance stock unit ("PSU") was granted on April 1, 2023, 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, 2023, to December 31, 2025. The PSUs were vested and settled on April 1, 2026.

Footnote F2

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.

Footnote F3

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 vested and settled on April 1, 2026.

Footnote F4

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. One-third of the RSUs vested and were settled on April 1, 2026. The remaining one-third of the RSUs will vest and settle on April 1, 2027.

Footnote F5

Each 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. One-third of the RSUs vested and were settled on April 1, 2026. The remaining two-thirds of the RSUs will vest and settle in equal parts on April 1, 2027 and April 1, 2028.