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. 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 24, 2019 |
The undersigned, Deerfield Mgmt IV, L.P., Deerfield Mgmt, L.P., Deerfield Management Company, L.P., Deerfield Private Design Fund IV, L.P. and Deerfield Special Situations Fund, L.P., are jointly filing the attached Initial Statement of Beneficial Ownership on Form 3 with James E. Flynn with respect to the beneficial ownership of securities of Cabaletta Bio, Inc.
Signatures:
DEERFIELD MGMT IV, L.P.
By: J.E. Flynn Capital IV, LLC, General Partner
By:/s/ Jonathan Isler Jonathan Isler, Attorney-In-Fact
| DEERFIELD MGMT, L.P.
By: J.E. Flynn Capital, 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 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 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
|