Millennium Group reports 5.3% stake in Cabaletta Bio

Cabaletta Bio, Inc. Schedule 13G reports that Millennium Management LLC, together with Millennium Group Management LLC and Israel A. Englander, beneficially hold 5,130,763 shares of common stock, representing 5.3% of the class.

Rhea-AI Filing Summary

Cabaletta Bio, Inc. Schedule 13G reports that Millennium Management LLC, together with Millennium Group Management LLC and Israel A. Englander, beneficially hold 5,130,763 shares of common stock, representing 5.3% of the class.

The filing states the holders report shared voting power and shared dispositive power over the 5,130,763 shares and includes a Joint Filing Agreement dated February 17, 2026.

Insights

Corporate Governance Analyst

Joint filing shows coordinated disclosure of a 5.3% stake.

The filing lists shared voting power and shared dispositive power over 5,130,763 shares as reported on the cover pages. The owners executed a Joint Filing Agreement dated February 17, 2026.

Implications depend on future amendments or schedules disclosing changes; subsequent filings would show any change in voting or disposition rights.

Equity Markets Specialist

A 5.3% position is a notable passive holding but not a controlling stake.

The disclosed 5,130,763 shares equals 5.3% of the class according to Item 11 on the cover pages. The reporting persons disclaim construing that figure as an admission of beneficial ownership beyond the disclosed voting/dispositive powers.

Market impact will depend on whether these holders buy, sell, or file different schedules in the future; timing and cash‑flow treatment are not stated here.

FAQ

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

What stake does Millennium report in Cabaletta Bio (CABA)?

The filing reports 5,130,763 shares, representing 5.3% of Cabaletta Bio's common stock. The shares are reported with shared voting and shared dispositive power by the listed filers under a joint filing agreement dated February 17, 2026.

Who filed the Schedule 13G for CABA?

The Schedule 13G was filed jointly by Millennium Management LLC, Millennium Group Management LLC, and Israel A. Englander. The filing includes addresses at 399 Park Avenue, New York, and signatures dated February 17, 2026.

Does the 13G indicate sole voting control of CABA shares?

No. The cover pages report 0 shares of sole voting power and 5,130,763 shares of shared voting power. The filing therefore discloses shared, not sole, voting authority over the reported shares.

Is the reported ownership in CABA admitted as beneficial ownership?

The filing states that the reported securities are held by entities subject to voting and investment discretion by the filers and cautions that this should not be construed as an admission of beneficial ownership by the filers.

What agreement among the filers is included in the CABA filing?

The filing includes an Exhibit I: Joint Filing Agreement dated February 17, 2026 among Millennium Management LLC, Millennium Group Management LLC, and Israel A. Englander, reflecting the joint reporting arrangement.

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

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Accepted by SEC EDGAR 02/18/2026 - 05:04 PM 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, par value $0.00001 per share

(Title of Class of Securities)

12674W109

(CUSIP Number)

02/11/2026

(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)

SCHEDULE 13G

CUSIP No. 12674W109

1

Names of Reporting Persons

Millennium Management LLC

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 0.00
6	Shared Voting Power 5,130,763.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,130,763.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,130,763.00

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)

5.3 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 12674W109

1

Names of Reporting Persons

Millennium Group Management LLC

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 0.00
6	Shared Voting Power 5,130,763.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,130,763.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,130,763.00

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)

5.3 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

CUSIP No. 12674W109

1

Names of Reporting Persons

Israel A. Englander

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 0.00
6	Shared Voting Power 5,130,763.00
7	Sole Dispositive Power 0.00
8	Shared Dispositive Power 5,130,763.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

5,130,763.00

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)

5.3 %

12

Type of Reporting Person (See Instructions)

IN

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, Pennsylvania 19104
Item 2.
(a)	Name of person filing: Millennium Management LLC Millennium Group Management LLC Israel A. Englander
(b)	Address or principal business office or, if none, residence: Millennium Management LLC 399 Park Avenue New York, New York 10022 Millennium Group Management LLC 399 Park Avenue New York, New York 10022 Israel A. Englander c/o Millennium Management LLC 399 Park Avenue New York, New York 10022
(c)	Citizenship: Millennium Management LLC - Delaware Millennium Group Management LLC - Delaware Israel A. Englander - United States
(d)	Title of class of securities: Common Stock, par value $0.00001 per share
(e)	CUSIP No.: 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).
Item 4.	Ownership
(a)	Amount beneficially owned: See response to Item 9 on each cover page.
(b)	Percent of class: See response to Item 11 on each cover page.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: See response to Item 5 on each cover page.
	(ii) Shared power to vote or to direct the vote: See response to Item 6 on each cover page.
	(iii) Sole power to dispose or to direct the disposition of: See response to Item 7 on each cover page.
	(iv) Shared power to dispose or to direct the disposition of: See response to Item 8 on each cover page. The securities disclosed herein as potentially beneficially owned by Millennium Management LLC, Millennium Group Management LLC and Mr. Englander are held by entities subject to voting control and investment discretion by Millennium Management LLC and/or other investment managers that may be controlled by Millennium Group Management LLC (the managing member of Millennium Management LLC) and Mr. Englander (the sole voting trustee of the managing member of Millennium Group Management LLC). The foregoing should not be construed in and of itself as an admission by Millennium Management LLC, Millennium Group Management LLC or Mr. Englander as to beneficial ownership of the securities held by such entities.
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.
	Not Applicable
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.
	If a group has filed this schedule pursuant to §240.13d-1(b)(1)(ii)(K), so indicate under Item 3(k) and attach an exhibit stating the identity and Item 3 classification of each member of the group. If a group has filed this schedule pursuant to §240.13d-1(c) or §240.13d-1(d), attach an exhibit stating the identity of each member of the group. See Exhibit I
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 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.

Millennium Management LLC

Signature:	/s/ Gil Raviv
Name/Title:	Gil Raviv, Global General Counsel
Date:	02/17/2026

Millennium Group Management LLC

Signature:	/s/ Gil Raviv
Name/Title:	Gil Raviv, Global General Counsel
Date:	02/17/2026

Israel A. Englander

Signature:	/s/ Israel A. Englander
Name/Title:	Israel A. Englander
Date:	02/17/2026

Exhibit Information

Exhibit I: Joint Filing Agreement, dated as of February 17, 2026, by and among Millennium Management LLC, Millennium Group Management LLC and Israel A. Englander.