[Form 4] Certara, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Certara, Inc. SVP and General Counsel Daniel Corcoran exercised restricted stock units into common shares as part of his equity compensation. On April 1, 2026, one-third of a prior RSU grant vested and settled, delivering 10,849 shares of common stock. Of these, 5,751 shares were withheld at $5.70 per share to cover tax obligations, a non-market, tax-withholding disposition. Following these transactions, Corcoran directly held 21,319 shares of Certara common stock. The remaining RSUs from this grant are scheduled to vest and settle in equal parts on April 1, 2027 and April 1, 2028.

Insider Trade Summary

10,849 shares exercised/converted

Mixed 3 txns

Insider Corcoran Daniel

Role SVP and General Counsel

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	10,849	$0.00	--
Exercise	Common Stock	10,849	$0.00	--
Tax Withholding	Common Stock	5,751	$5.70	$33K

Holdings After Transaction: Restricted Stock Units — 21,698 shares (Direct); Common Stock — 27,070 shares (Direct)

Footnotes (1)

1. Each restricted stock unit ("RSU") was granted on May 20, 2025, under the Certara, Inc. ("Certara") 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. Represents shares of Certara withheld to satisfy tax withholding obligations in connection with the vesting of RSUs, exempt under Rule 16b-3.

Key Figures

RSU shares vested: 10,849 shares Shares withheld for taxes: 5,751 shares Tax withholding price: $5.70 per share +3 more

6 metrics

RSU shares vested 10,849 shares Restricted Stock Units settled into common stock on April 1, 2026

Shares withheld for taxes 5,751 shares Withheld to satisfy tax obligations on April 1, 2026

Tax withholding price $5.70 per share Value applied to 5,751 withheld shares

Shares owned after transaction 21,319 shares Common stock directly owned after April 1, 2026 events

RSU grant date May 20, 2025 Grant under Certara 2020 Incentive Plan

Future vesting dates April 1, 2027 and April 1, 2028 Remaining RSUs vest and settle in equal parts

Key Terms

Restricted Stock Units, 2020 Incentive Plan, Rule 16b-3, tax withholding obligations, +1 more

5 terms

Restricted Stock Units financial

"Each restricted stock unit ("RSU") was granted on May 20, 2025, under the Certara, Inc. 2020 Incentive Plan"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2020 Incentive Plan financial

"granted on May 20, 2025, under the Certara, Inc. ("Certara") 2020 Incentive Plan"

Rule 16b-3 regulatory

"Represents shares of Certara withheld to satisfy tax withholding obligations in connection with the vesting of RSUs, exempt under Rule 16b-3."

Rule 16b-3 is a Securities and Exchange Commission regulation that exempts certain routine, pre-approved transactions by company insiders from automatic liability for short-term trading profits. It acts like a safe harbor: if an insider follows a formal plan or the board approves specific transactions in advance, profits from buying and selling company stock within six months are not automatically reclaimed. Investors care because the rule clarifies when insider trades are permissible and reduces uncertainty about potential clawbacks.

tax withholding obligations financial

"Represents shares of Certara withheld to satisfy tax withholding obligations in connection with the vesting of RSUs"

Exercise or conversion of derivative security financial

"transaction_code_description": "Exercise or conversion of derivative security""

Form 4 Insider Transactions: What Each Field Means →

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

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Corcoran Daniel

(Last) (First) (Middle)

C/O CERTARA, INC.

4 RADNOR CORPORATE CENTER, SUITE 350

(Street)

RADNOR PENNSYLVANIA 19087

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Certara, Inc. [ CERT ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	SVP and General Counsel

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
04/01/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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	04/01/2026		M		10,849	A	$0(1)	27,070	D
Common Stock	04/01/2026		F		5,751(2)	D	$5.7(1)	21,319	D

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
Restricted Stock Units	(1)	04/01/2026		M			10,849	(1)	04/01/2028	Common Stock	10,849	$0	21,698	D

Explanation of Responses:

1. Each restricted stock unit ("RSU") was granted on May 20, 2025, under the Certara, Inc. ("Certara") 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.

2. Represents shares of Certara withheld to satisfy tax withholding obligations in connection with the vesting of RSUs, exempt under Rule 16b-3.

	/s/ Daniel Corcoran	04/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)