Dimensional Fund Advisors reports 3.9% Certara stake

Dimensional Fund Advisors LP filed an amended Schedule 13G reporting beneficial ownership of 6,022,686 shares of Certara Inc common stock, representing 3.9% of the class as of June 30, 2026.

Rhea-AI Filing Summary

Dimensional Fund Advisors LP filed an amended Schedule 13G reporting beneficial ownership of 6,022,686 shares of Certara Inc common stock, representing 3.9% of the class as of June 30, 2026.

Dimensional has sole voting power over 5,913,513 shares and sole dispositive power over 6,022,686 shares, with no shared voting or dispositive power. The shares are held by various funds and accounts for which Dimensional or its subsidiaries acts as adviser or manager. Dimensional may be deemed a beneficial owner but disclaims beneficial ownership, and states that no individual fund’s interest exceeds 5% of the class.

Key Figures

Beneficial ownership: 6,022,686 shares Percent of class: 3.9% Sole voting power: 5,913,513 shares +4 more

7 metrics

Beneficial ownership 6,022,686 shares Shares of Certara Inc common stock beneficially owned by Dimensional Fund Advisors LP

Percent of class 3.9% Ownership percentage of Certara Inc common stock reported by Dimensional

Sole voting power 5,913,513 shares Shares for which Dimensional has sole power to vote or direct the vote

Shared voting power 0 shares Shares for which Dimensional has shared power to vote

Sole dispositive power 6,022,686 shares Shares for which Dimensional has sole power to dispose or direct the disposition

Shared dispositive power 0 shares Shares for which Dimensional has shared power to dispose

Ownership date 06/30/2026 Date associated with the reported Certara Inc ownership position

Key Terms

beneficial owner, dispositive power, Investment Company Act of 1940, Section 13(d) of the Securities Exchange Act of 1934, +1 more

5 terms

beneficial owner regulatory

"may be deemed to be the beneficial owner of the shares"

A beneficial owner is the person who ultimately owns or controls a financial asset or property, even if their name isn't directly on official documents. Think of it like someone who secretly holds the keys to a safe deposit box—others may appear to have access, but the true owner is the one who benefits from what's inside. Identifying beneficial owners helps ensure transparency and prevent illegal activities like money laundering or fraud.

dispositive power regulatory

"sole power to dispose or to direct the disposition of"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

Investment Company Act of 1940 regulatory

"investment companies registered under the Investment Company Act of 1940"

A U.S. federal law that sets the rulebook for pooled investment vehicles such as mutual funds, exchange-traded funds and similar money managers, requiring them to register with regulators, disclose holdings and fees, limit conflicts of interest, and follow governance standards. It matters to investors because these protections and transparency rules act like a referee and scoreboard, helping people compare funds, trust that managers follow fair practices, and spot hidden costs or risks.

Section 13(d) of the Securities Exchange Act of 1934 regulatory

"for any other purposes than Section 13(d) of the Securities Exchange"

Section 13(d) of the Securities Exchange Act of 1934 is a U.S. rule that requires anyone who buys more than 5% of a public company’s shares to publicly disclose who they are, how many shares they own, and their intentions toward the company. For investors, this is like a neighborhood alert when someone acquires a large stake in a building: it reveals potential changes in control or strategy that could affect the stock’s price, governance, or future direction.

commingled funds financial

"serves as investment manager or sub-adviser to certain other commingled funds"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What Certara (CERT) stake does Dimensional Fund Advisors report?

Dimensional Fund Advisors LP reports beneficial ownership of 6,022,686 Certara shares, equal to 3.9% of the common stock class. This position is held across multiple funds and accounts for which Dimensional or its subsidiaries serves as investment adviser or manager.

How much voting power over Certara (CERT) stock does Dimensional have?

Dimensional reports sole voting power over 5,913,513 Certara shares and no shared voting power. It also reports sole dispositive power over 6,022,686 shares, meaning it alone can decide how those shares are sold or otherwise disposed of.

Who is considered the actual owner of the Certara (CERT) shares reported by Dimensional?

All reported Certara shares are owned by various Funds advised or managed by Dimensional or its subsidiaries. Dimensional may be deemed a beneficial owner because it has voting or investment power but explicitly disclaims beneficial ownership of these securities.

Does any single Dimensional-advised fund hold over 5% of Certara (CERT)?

According to the filing, no individual Fund’s interest exceeds 5% of the Certara class. Each fund has the right to receive dividends or sale proceeds on the shares it holds, but none individually crosses the 5% ownership threshold.

What does it mean that Dimensional reports ownership of 5 percent or less of Certara (CERT)?

The filing states ownership of 3.9% of Certara’s common stock, which falls under the “5 percent or less” category. This reflects Dimensional’s aggregate position across its advised funds, below the 5% level often associated with larger block holders.

What legal framework governs Dimensional’s role in holding Certara (CERT) shares?

Dimensional is an investment adviser registered under Section 203 of the Investment Advisers Act of 1940 and advises funds registered under the Investment Company Act of 1940. Its Certara stake is reported under Section 13(d) of the Exchange Act.

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

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Accepted by SEC EDGAR 07/14/2026 - 01:27 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

(Amendment No. 1)

Certara Inc

(Name of Issuer)

Common Stock

(Title of Class of Securities)

15687V109

(CUSIP Number)

06/30/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 15687V109

1

Names of Reporting Persons

Dimensional Fund Advisors LP

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 5,913,513.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 6,022,686.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

6,022,686.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

3.9 %

12

Type of Reporting Person (See Instructions)

IA

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Certara Inc
(b)	Address of issuer's principal executive offices: 100 Overlook Center, Suite 101, Princeton, NJ 08540
Item 2.
(a)	Name of person filing: Dimensional Fund Advisors LP
(b)	Address or principal business office or, if none, residence: 6300 Bee Cave Road, Building One, Austin, TX 78746
(c)	Citizenship: Delaware Limited Partnership
(d)	Title of class of securities: Common Stock
(e)	CUSIP No.: 15687V109
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: 6,022,686 ** see Note 1 ** ** Note 1 ** Dimensional Fund Advisors LP, an investment adviser registered under Section 203 of the Investment Advisors Act of 1940, furnishes investment advice to four investment companies registered under the Investment Company Act of 1940, and serves as investment manager or sub-adviser to certain other commingled funds, group trusts and separate accounts (such investment companies, trusts and accounts, collectively referred to as the "Funds"). In certain cases, subsidiaries of Dimensional Fund Advisors LP may act as an adviser or sub-adviser to certain Funds. In its role as investment advisor, sub-adviser and/or manager, Dimensional Fund Advisors LP or its subsidiaries (collectively, "Dimensional") may possess voting and/or investment power over the securities of the Issuer that are owned by the Funds, and may be deemed to be the beneficial owner of the shares of the Issuer held by the Funds. However, all securities reported in this schedule are owned by the Funds. Dimensional disclaims beneficial ownership of such securities. In addition, the filing of this Schedule 13G shall not be construed as an admission that the reporting person or any of its affiliates is the beneficial owner of any securities covered by this Schedule 13G for any other purposes than Section 13(d) of the Securities Exchange Act of 1934.
(b)	Percent of class: 3.9 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 5,913,513** see Note 1 **
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 6,022,686** see Note 1 **
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Ownership of 5 percent or less of a class
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. The Funds described in Note 1 above have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the securities held in their respective accounts. To the knowledge of Dimensional, the interest of any one such Fund does not exceed 5% of the class of securities. Dimensional Fund Advisors LP disclaims beneficial ownership of all such securities.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

Dimensional Fund Advisors LP

Signature:	Selwyn Notelovitz
Name/Title:	Global Chief Compliance Officer
Date:	07/14/2026