Norges Bank discloses 5.38% stake in Cabaletta Bio

Rhea-AI Filing Summary

Norges Bank, the central bank of Norway, reported a significant ownership position in Cabaletta Bio, Inc. common stock on a Schedule 13G. Norges Bank is the beneficial owner of 8,775,653 shares of Cabaletta Bio common stock, representing 5.3820% of the class, as of June 30, 2026. It holds 8,663,310 shares with sole voting power and none with shared voting power. Regarding dispositive power, Norges Bank has sole power over 4,112,401 shares and shared power over 4,663,252 shares. Certain shares are invested on behalf of the Government of Norway, and Norges Bank files in its capacity as an investment adviser under a foreign regulatory regime it states is substantially comparable to that applicable to equivalent U.S. institutions.

Key Figures

Beneficial ownership: 8,775,653 shares Percent of class: 5.3820 % Sole voting power: 8,663,310 shares +3 more

6 metrics

Beneficial ownership 8,775,653 shares Total Cabaletta Bio common shares beneficially owned by Norges Bank

Percent of class 5.3820 % Portion of Cabaletta Bio common stock class owned by Norges Bank

Sole voting power 8,663,310 shares Shares over which Norges Bank has sole power to vote or direct the vote

Shared voting power 0 shares Shares over which Norges Bank has shared power to vote or direct the vote

Sole dispositive power 4,112,401 shares Shares over which Norges Bank has sole power to dispose or direct disposition

Shared dispositive power 4,663,252 shares Shares over which Norges Bank has shared power to dispose or direct disposition

Key Terms

beneficially owned, sole voting power, dispositive power, Schedule 13D, +1 more

5 terms

beneficially owned financial

"Ownership (a) | Amount beneficially owned: 8775653"

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 8,663,310.00"

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.

dispositive power financial

"Sole Dispositive Power 4,112,401.00"

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.

Schedule 13D regulatory

"information that would otherwise be disclosed in a Schedule 13D"

A Schedule 13D is a legal document that investors file with regulators when they buy a large enough stake in a company to potentially influence its management or decisions. It provides details about the investor’s intention, ownership stake, and plans, helping other investors understand who is gaining control and what their motives might be.

Investment Company Act of 1940 regulatory

"investment company 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.

FAQ

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

What percentage of Cabaletta Bio (CABA) does Norges Bank report owning?

Norges Bank reports beneficial ownership of 5.3820% of Cabaletta Bio’s common stock. This corresponds to 8,775,653 shares as disclosed in its Schedule 13G filing for the company.

How many Cabaletta Bio (CABA) shares does Norges Bank beneficially own?

Norges Bank beneficially owns 8,775,653 Cabaletta Bio common shares. This stake represents 5.3820% of the company’s outstanding common stock, according to the Schedule 13G ownership disclosure filed by Norges Bank.

What voting power does Norges Bank have over its Cabaletta Bio (CABA) shares?

Norges Bank reports sole voting power over 8,663,310 Cabaletta Bio shares and 0 shares with shared voting power. These figures define how many shares it can vote or direct the vote for on its own.

How is dispositive power over Cabaletta Bio (CABA) shares split for Norges Bank?

Norges Bank has sole dispositive power over 4,112,401 shares and shared dispositive power over 4,663,252 shares. Dispositive power relates to the ability to dispose of or direct the disposition of the securities.

On whose behalf are some of Norges Bank’s Cabaletta Bio (CABA) shares held?

The filing states that certain Cabaletta Bio shares reported by Norges Bank are invested on behalf of the Government of Norway. Norges Bank acts as an investment manager subject to a foreign regulatory scheme it describes as substantially comparable to U.S. rules.

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

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Accepted by SEC EDGAR 08/12/2026 - 06:36 AM EDT Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Cabaletta Bio, Inc.

(Name of Issuer)

Common Stock

(Title of Class of Securities)

12674W109

(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): 12674W109

1

Names of Reporting Persons

Norges Bank

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

NORWAY

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 8,663,310.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 4,112,401.00
8	Shared Dispositive Power 4,663,252.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

8,775,653.00

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)

5.3820 %

12

Type of Reporting Person (See Instructions)

FI, OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Cabaletta Bio, Inc.
(b)	Address of issuer's principal executive offices: 2929 Arch Street, Suite 600, Philadelphia, PA, 19104
Item 2.
(a)	Name of person filing: Norges Bank
(b)	Address or principal business office or, if none, residence: Bankplassen 2, PO Box 1179 Sentrum, Oslo, NO-0107, Oslo, Norway
(c)	Citizenship: Norway
(d)	Title of class of securities: Common Stock
(e)	CUSIP Number(s): 12674W109
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).
	Investment Adviser
Item 4.	Ownership
(a)	Amount beneficially owned: 8775653
(b)	Percent of class: 5.3820 %
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: 8663310
	(ii) Shared power to vote or to direct the vote: 0
	(iii) Sole power to dispose or to direct the disposition of: 4112401
	(iv) Shared power to dispose or to direct the disposition of: 4663252
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. Certain shares reported herein are invested on behalf of the Government of Norway.
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. I also certify that, to the best of my knowledge and belief, the foreign regulatory scheme applicable to the investment management division of Norges Bank, the central bank of Norway, is substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s). I undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.

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.

Norges Bank

Signature:	Stanislav Boiadjiev
Name/Title:	Business and Regulatory Compliance
Date:	08/12/2026