BlackRock reports 11.6% stake in Certara (18.0M shares)

BlackRock, Inc. amended a Schedule 13G filing to report beneficial ownership of 18,032,062 shares of Certara, Inc. common stock, representing 11.6% of the class.

Rhea-AI Filing Summary

BlackRock, Inc. amended a Schedule 13G filing to report beneficial ownership of 18,032,062 shares of Certara, Inc. common stock, representing 11.6% of the class. The amendment shows BlackRock holds 17,841,248 shares with sole voting power and 18,032,062 shares with sole dispositive power.

The filing is signed by Spencer Fleming as Managing Director and includes Exhibit 24 (power of attorney) and Exhibit 99 (Item 7 subsidiary detail). The filing notes ownership reflects aggregated positions of certain Reporting Business Units of BlackRock.

Insights

Institutional Ownership Analyst

BlackRock reports an 11.6% stake in Certara via aggregated business units.

The amendment quantifies beneficial ownership as 18,032,062 shares and states sole voting power over 17,841,248 shares. This is an ownership disclosure under Schedule 13G/A reflecting passive or aggregated holdings rather than a transaction detail.

Investor attention should focus on the disclosed 11.6% stake and the aggregate reporting structure; subsequent filings could change the position if holdings or voting arrangements shift.

Corporate Governance Specialist

Filing clarifies which BlackRock business units aggregate voting and dispositive power.

The Schedule 13G/A explains the reported shares reflect positions of certain Reporting Business Units of BlackRock and excludes other disaggregated units per SEC Release No. 34-39538. It identifies no single underlying holder above 5% of Certara.

Exhibit references include a power of attorney and Item 7 subsidiary identification; these documents provide the operational trace for who within BlackRock holds or directs the shares.

Key Figures

Beneficial ownership: 18,032,062 shares Percent of class: 11.6% Sole voting power: 17,841,248 shares

3 metrics

Beneficial ownership 18,032,062 shares Amount beneficially owned reported in Item 4

Percent of class 11.6% Percent of common stock reported in Item 4

Sole voting power 17,841,248 shares Shares with sole power to vote reported in Item 4

Key Terms

Schedule 13G/A, Beneficial ownership, Sole dispositive power

3 terms

Schedule 13G/A regulatory

"Amendment No. 1; Schedule 13G/A reports beneficial ownership"

A Schedule 13G/A is an amended public filing with the U.S. securities regulator that updates a previous Schedule 13G, disclosing when an individual or group holds a substantial (typically over 5%) stake in a company and is claiming a passive, non‑controlling intent. Investors monitor these updates because rising or falling holdings can signal changing confidence, potential future moves, or shifts in voting power — like watching a public ledger where large shareholders quietly adjust their positions.

Beneficial ownership financial

"Amount beneficially owned: 18032062"

Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.

Sole dispositive power financial

"Sole power to dispose or to direct the disposition of: 18032062"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

FAQ

What stake does BlackRock report in CERT?

BlackRock reports beneficial ownership of 18,032,062 shares, representing 11.6% of Certara's common stock. The filing lists 17,841,248 shares as subject to sole voting power and 18,032,062 shares as subject to sole dispositive power.

Does the Schedule 13G/A show who within BlackRock holds the shares?

The filing attributes holdings to certain Reporting Business Units of BlackRock, Inc. It states positions are aggregated for those units per SEC Release No. 34-39538 and excludes other disaggregated business units from this report.

Are these holdings reported as passive or active ownership?

The Schedule 13G/A format indicates an ownership disclosure rather than a transaction report. The filing does not describe active acquisition intent; it aggregates holdings of Reporting Business Units and provides voting/dispositive counts.

Who signed the amendment and when was it signed?

The amendment is signed by Spencer Fleming, Managing Director. The signature block in the excerpt shows the date as 07/08/2026 alongside Exhibit listings for a power of attorney and Item 7 details.

Does the filing identify any third party with rights to proceeds or dividends?

The filing states various persons have rights to dividends or proceeds, but also notes no one person's interest exceeds 5% of the total outstanding common shares, and lists standard Investment Company Act exceptions.

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

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Available on EDGAR 07/08/2026 - 11:13 AM Accepted by SEC EDGAR 07/08/2026 - 11:12 AM 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

BlackRock, Inc.

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

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 17,841,248.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 18,032,062.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

18,032,062.00

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)

11.6 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Certara, Inc.
(b)	Address of issuer's principal executive offices: 4 RADNOR CORPORATE CENTER, SUITE 350 RADNOR PA 19087
Item 2.
(a)	Name of person filing: BlackRock, Inc. In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units (collectively, the "Reporting Business Units") of BlackRock, Inc. and its subsidiaries and affiliates. It does not include securities, if any, beneficially owned by other business units whose beneficial ownership of securities are disaggregated from that of the Reporting Business Units in accordance with such release.
(b)	Address or principal business office or, if none, residence: BlackRock, Inc., 50 Hudson Yards New York, NY 10001
(c)	Citizenship: See Item 4 of Cover Page
(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: 18032062
(b)	Percent of class: 11.6 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 17841248
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 18032062
	(iv) Shared power to dispose or to direct the disposition of: 0
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
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. Various persons have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of the common stock of Certara, Inc.. No one person's interest in the common stock of Certara, Inc. is more than five percent of the total outstanding common shares.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	If a parent holding company has filed this schedule, pursuant to Rule 13d-1(b)(ii)(G), so indicate under Item 3(g) and attach an exhibit stating the identity and the Item 3 classification of the relevant subsidiary. If a parent holding company has filed this schedule pursuant to Rule 13d-1(c) or Rule 13d-1(d), attach an exhibit stating the identification of the relevant subsidiary. See Exhibit 99
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.

BlackRock, Inc.

Signature:	Spencer Fleming
Name/Title:	Managing Director
Date:	07/08/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7