Certara officer may sell 36,066 shares

Officer Leif Pedersen filed a Rule 144 notice to potentially sell 36,066 CERT common shares received from restricted stock vesting.

Rhea-AI Filing Summary

Certara, Inc. (CERT) has a notice of proposed sale under Rule 144 filed for the account of officer Leif Pedersen. The filing covers the potential sale of 36,066 shares of common stock through Fidelity Brokerage Services LLC with an aggregate market value of $300,069.12 on NASDAQ.

The shares relate to restricted stock vesting received from the issuer as compensation on April 1, 2026. Certara reports 152,538,780 shares outstanding as of September 3, 2026; this is a baseline figure, not the amount being sold.

Key Figures

Shares proposed for sale: 36,066 shares Aggregate market value of proposed sale: $300,069.12 Shares outstanding: 152,538,780 shares +2 more

5 metrics

Shares proposed for sale 36,066 shares Common stock covered by the Rule 144 notice for Leif Pedersen

Aggregate market value of proposed sale $300,069.12 Value associated with 36,066 Certara common shares in the notice

Shares outstanding 152,538,780 shares Certara common shares outstanding as of September 3, 2026

Acquisition date of restricted stock April 1, 2026 Date of restricted stock vesting from issuer as compensation

Proposed sale date reference September 3, 2026 Date tied to the Rule 144 securities information entry

Key Terms

Rule 144, Restricted Stock Vesting, attorney-in-fact, aggregate market value

4 terms

Rule 144 regulatory

"See the definition of "person" in paragraph (a) of Rule 144."

Rule 144 is a U.S. securities regulation that sets conditions under which restricted or insider-held shares can be legally resold to the public, such as required holding periods, availability of public information, limits on how much can be sold at once, and certain filing requirements. For investors it matters because it determines when previously locked-up shares can enter the market — like a release valve that can increase supply, affect share price, and signal insider intent.

Restricted Stock Vesting financial

"Common | 04/01/2026 | Restricted Stock Vesting | Issuer"

Restricted stock vesting is the timetable and conditions under which shares granted to employees or insiders become fully owned and can be sold, typically requiring continued work or meeting performance goals. It matters to investors because large blocks of shares can become tradable at once, which can change share supply and price, and because vesting aligns insiders’ incentives with the company’s long‑term performance—think of it like a timed unlock that both rewards and locks in key people.

attorney-in-fact regulatory

"as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Leif Pedersen"

An attorney-in-fact is the person or entity given legal authority through a power of attorney to act on behalf of another for specific tasks, such as signing documents, voting shares, or handling transactions. For investors, this matters because it lets a trusted representative make timely decisions or complete paperwork when the owner cannot, much like handing keys to someone to run errands on your behalf—so checks on scope and limits of that authority are important.

aggregate market value financial

"Common | Fidelity Brokerage Services LLC ... | 36066 | 300069.12"

Aggregate market value is the combined price you would pay to buy all outstanding shares of a company or all companies in a group at current market prices — essentially the sum of each stock’s market capitalization. It matters to investors because it shows the overall size and weight of an investment or sector (like the total cost to buy every piece of a puzzle), helps compare scale across companies or markets, and influences index composition and risk exposure.

FAQ

What does the Form 144 filing disclose for Certara, Inc. (CERT)?

The Form 144 notice discloses that officer Leif Pedersen may sell up to 36,066 shares of Certara common stock under Rule 144 through Fidelity Brokerage Services LLC on NASDAQ.

How many Certara (CERT) shares are covered by this Rule 144 notice?

The notice covers a potential sale of 36,066 shares of Certara common stock, with an indicated aggregate market value of $300,069.12.

What is the origin of the Certara (CERT) shares in this Form 144?

The 36,066 shares were acquired as restricted stock vesting from the issuer, Certara, Inc., on April 1, 2026 as compensation.

What share count does Certara (CERT) report in this filing?

Certara reports 152,538,780 shares outstanding as of September 3, 2026. This number provides context for the company’s equity base and is separate from the 36,066 shares covered by the proposed sale.

Who is executing the potential sale in the Certara (CERT) Form 144?

The potential sale of Certara shares is to be executed through Fidelity Brokerage Services LLC. The Form 144 is signed by Gary Redman as a duly authorized representative of Fidelity, acting as attorney-in-fact for Leif Pedersen.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/03/2026 - 11:10 AM Accepted by SEC EDGAR 09/03/2026 - 11:09 AM Learn about SEC filing dates

Form 144 Filer Information	UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 Form 144 NOTICE OF PROPOSED SALE OF SECURITIES PURSUANT TO RULE 144 UNDER THE SECURITIES ACT OF 1933
FORM 144

144: Filer Information

Filer CIK	0001559712
Filer CCC	XXXXXXXX
Is this a LIVE or TEST Filing?	LIVE TEST
Submission Contact Information
Name
Phone
E-Mail Address

144: Issuer Information

Name of Issuer	Certara, Inc.
SEC File Number	001-39799
Address of Issuer	4 RADNOR CORPORATE CENTER, SUITE 350 RADNOR PENNSYLVANIA 19087
Phone	(415) 237-8272
Name of Person for Whose Account the Securities are To Be Sold	Pedersen Leif E
See the definition of "person" in paragraph (a) of Rule 144. Information is to be given not only as to the person for whose account the securities are to be sold but also as to all other persons included in that definition. In addition, information shall be given as to sales by all persons whose sales are required by paragraph (e) of Rule 144 to be aggregated with sales for the account of the person filing this notice.
Relationship to Issuer	Officer

144: Securities Information

Title of the Class of Securities To Be Sold	Name and Address of the Broker	Number of Shares or Other Units To Be Sold	Aggregate Market Value	Number of Shares or Other Units Outstanding	Approximate Date of Sale	Name the Securities Exchange
Common	Fidelity Brokerage Services LLC 900 Salem Street Smithfield RI 02917	36066	300069.12	152538780	09/03/2026	NASDAQ

Furnish the following information with respect to the acquisition of the securities to be sold and with respect to the payment of all or any part of the purchase price or other consideration therefor:

144: Securities To Be Sold

Title of the Class	Date you Acquired	Nature of Acquisition Transaction	Name of Person from Whom Acquired	Is this a Gift?	Date Donor Acquired	Amount of Securities Acquired	Date of Payment	Nature of Payment *
Common	04/01/2026	Restricted Stock Vesting	Issuer			36066	04/01/2026	Compensation

* If the securities were purchased and full payment therefor was not made in cash at the time of purchase, explain in the table or in a note thereto the nature of the consideration given. If the consideration consisted of any note or other obligation, or if payment was made in installments describe the arrangement and state when the note or other obligation was discharged in full or the last installment paid.

Furnish the following information as to all securities of the issuer sold during the past 3 months by the person for whose account the securities are to be sold.

144: Securities Sold During The Past 3 Months

Nothing to Report

144: Remarks and Signature

Remarks
Date of Notice	09/03/2026
Date of Plan Adoption or Giving of Instruction, If Relying on Rule 10b5-1	06/04/2026
ATTENTION:
The person for whose account the securities to which this notice relates are to be sold hereby represents by signing this notice that he does not know any material adverse information in regard to the current and prospective operations of the Issuer of the securities to be sold which has not been publicly disclosed. If such person has adopted a written trading plan or given trading instructions to satisfy Rule 10b5-1 under the Exchange Act, by signing the form and indicating the date that the plan was adopted or the instruction given, that person makes such representation as of the plan adoption or instruction date.
Signature	/s/ Gary Redman, as a duly authorized representative of Fidelity Brokerage Services LLC, as attorney-in-fact for Leif Pedersen
ATTENTION: Intentional misstatements or omission of facts constitute Federal Criminal Violations (See 18 U.S.C. 1001)