Item 7.01 Regulation FD Disclosure.

On January 9, 2023, Cabaletta Bio, Inc. (the "Company") posted to the "Investors & Media" section of the Company's website at www.cabalettabio.com an updated corporate presentation providing a corporate overview and updated development plan (the "Corporate Presentation"). A copy of the Corporate Presentation is attached hereto as Exhibit 99.1 and is incorporated by reference into this Item 7.01 of this Current Report on Form 8-K.

The information contained in Item 7.01 of this Current Report on Form 8-K, including Exhibit 99.1 attached hereto, is being furnished and shall not be deemed to be "filed" for the purposes of Section 18 of the Securities Exchange Act of 1934, as amended (the "Exchange Act"), or otherwise subject to the liabilities of that section and shall not be incorporated by reference in any filing under the Securities Act of 1933, as amended, or the Exchange Act, except as shall be expressly set forth by specific reference in such filing.

Item 9.01 Financial Statements and Exhibits.

(d) Exhibits



99.1      Cabaletta Bio, Inc. Corporate Presentation, dated January 9, 2023.

104     Cover Page Interactive Data File (embedded within the Inline XBRL Document).

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