Joint Filer Information

 

Names:

Deerfield Mgmt IV, L.P., Deerfield Mgmt, L.P., Deerfield Management Company, L.P.,

Deerfield Private Design Fund IV, L.P., Deerfield Partners, L.P. and Deerfield Special Situations Fund, L.P.

   
Address:

780 Third Avenue, 37th Floor

New York, NY 10017

   
Designated Filer: James E. Flynn
   
Issuer and Ticker Symbol:

Cabaletta Bio, Inc. [CABA]

   
Date of Event Requiring Statement: 

October 29, 2019

 

The undersigned, Deerfield Mgmt IV, L.P., Deerfield Mgmt, L.P., Deerfield Management Company, L.P., Deerfield Private Design Fund IV, L.P., Deerfield Partners, L.P. and Deerfield Special Situations Fund, L.P. are jointly filing the attached Statement of Changes in Beneficial Ownership on Form 4 with James E. Flynn with respect to the beneficial ownership of securities of Cabaletta Bio, Inc.

 

Signatures: 

 

DEERFIELD MGMT, L.P.

By: J.E. Flynn Capital, LLC, General Partner

 

By: /s/ Jonathan Isler

Jonathan Isler, Attorney-In-Fact

 

DEERFIELD MGMT IV, L.P.

By: J.E. Flynn Capital IV, LLC, General Partner

 

By: /s/ Jonathan Isler

Jonathan Isler, Attorney-In-Fact

DEERFIELD MANAGEMENT COMPANY, L.P.

By: Flynn Management LLC, General Partner

 

By: /s/ Jonathan Isler

Jonathan Isler, Attorney-In-Fact

DEERFIELD PRIVATE DESIGN FUND IV, L.P.

By: Deerfield Mgmt IV, L.P., General Partner 

By: J.E. Flynn Capital IV, LLC, General Partner

 

By: /s/ Jonathan Isler

Jonathan Isler, Attorney-In-Fact

 

DEERFIELD SPECIAL SITUATIONS FUND, L.P.

By: Deerfield Mgmt, L.P., General Partner

By: J.E. Flynn Capital, LLC, General Partner

 

By: /s/ Jonathan Isler

Jonathan Isler, Attorney-In-Fact

DEERFIELD PARTNERS, L.P.

By: Deerfield Mgmt, L.P., General Partner

By: J.E. Flynn Capital, LLC, General Partner

 

By: /s/ Jonathan Isler

Jonathan Isler, Attorney-In-Fact