BlackRock reports 8% stake in Cogent Biosciences

Rhea-AI Filing Summary

BlackRock, Inc. reports its institutional ownership position in Cogent Biosciences, Inc. common stock in an amended Schedule 13G. As of June 30, 2026, BlackRock and specified reporting business units beneficially owned 13,593,063 shares of Cogent Biosciences common stock, representing 8.0% of the outstanding class.

BlackRock is reported to have sole voting power over 13,349,772 shares and sole dispositive power over 13,593,063 shares, with no shared voting or dispositive power. Various underlying clients have rights to dividends or sale proceeds, but no single client holds more than five percent of Cogent Biosciences’ outstanding common shares.

Key Figures

Beneficial ownership: 13,593,063 shares Ownership percentage: 8.0% Sole voting power: 13,349,772 shares +3 more

6 metrics

Beneficial ownership 13,593,063 shares Cogent Biosciences common stock beneficially owned by BlackRock as of June 30, 2026

Ownership percentage 8.0% Percent of Cogent Biosciences common stock class held by BlackRock

Sole voting power 13,349,772 shares Shares over which BlackRock has sole power to vote or direct the vote

Shared voting power 0 Shares over which BlackRock has shared power to vote

Sole dispositive power 13,593,063 shares Shares over which BlackRock has sole power to dispose or direct disposition

Shared dispositive power 0 Shares over which BlackRock has shared power to dispose

Key Terms

beneficially owned, sole voting power, sole dispositive power, parent holding company, +1 more

5 terms

beneficially owned financial

"this reflects the securities beneficially owned, or deemed to be beneficially owned, by certain business units"

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

sole voting power financial

"Sole Voting Power 13,349,772.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

sole dispositive power financial

"Sole Dispositive Power 13,593,063.00"

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.

parent holding company financial

"If a parent holding company has filed this schedule, pursuant to (ii)(G)"

Schedule 13G regulatory

"In accordance with SEC Release No. 34-39538 (January 12, 1998), this reflects the securities"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

FAQ

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

How many Cogent Biosciences (COGT) shares does BlackRock beneficially own?

BlackRock beneficially owns 13,593,063 Cogent Biosciences common shares. This position is reported as of June 30, 2026 and is held by certain BlackRock business units and affiliates covered under the Schedule 13G/A filing.

What percentage of Cogent Biosciences (COGT) does BlackRock hold?

BlackRock reports holding 8.0% of Cogent Biosciences’ outstanding common stock. This percentage reflects the shares beneficially owned by specified BlackRock reporting business units as of June 30, 2026 under the Schedule 13G/A.

What voting power does BlackRock have over Cogent Biosciences (COGT) shares?

BlackRock has sole voting power over 13,349,772 shares of Cogent Biosciences and no shared voting power. It also has sole dispositive power over 13,593,063 shares, indicating control over how those shares may be voted and disposed.

Does any single BlackRock client own more than 5% of Cogent Biosciences (COGT)?

No, no one person’s interest in Cogent Biosciences common stock exceeds five percent of the total outstanding common shares. Various persons have rights to dividends or sale proceeds through accounts managed by BlackRock.

Who signed the Schedule 13G/A filing for Cogent Biosciences (COGT) on behalf of BlackRock?

The filing was signed by Spencer Fleming, a Managing Director at BlackRock, Inc. The signature is supported by a Power of Attorney included as Exhibit 24 to the Schedule 13G/A filing.

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

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Available on EDGAR 07/27/2026 - 04:27 PM Accepted by SEC EDGAR 07/27/2026 - 04:25 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. 3)

Cogent Biosciences, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

19240Q201

(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): 19240Q201

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 13,349,772.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 13,593,063.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

13,593,063.00

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)

8.0 %

12

Type of Reporting Person (See Instructions)

HC

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Cogent Biosciences, Inc.
(b)	Address of issuer's principal executive offices: 180 Third Avenue, 4th Floor WALTHAM MA 02451
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.: 19240Q201
Item 4.	Ownership
(a)	Amount beneficially owned: 13593063
(b)	Percent of class: 8.0 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 13349772
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 13593063
	(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 Cogent Biosciences, Inc.. No one person's interest in the common stock of Cogent Biosciences, 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:	07/27/2026

Exhibit Information

Exhibit 24: Power of Attorney Exhibit 99: Item 7