Cabaletta Bio, Inc.

CABA·NASDAQ·$3.72Share Price as of 11/2·$358MMarket Cap as of 11/2

Financials

10-QQ2 ended 06/30/2608/13/26 10-QQ1 ended 03/31/2605/14/26 10-KFY 202503/23/26 10-QQ3 ended 09/30/2511/10/25 10-QQ2 ended 06/30/2508/07/25

Disclosures

8-KCurrent report09/14/26 8-KCurrent report08/13/26 8-KCurrent report06/11/26 8-KCurrent report06/03/26 8-KCurrent report05/14/26

Prospectuses and Registrations

424B5Prospectus supplement05/04/26 S-8Registration of securities for employees03/23/26 S-3Shelf registration08/07/25 424B5Prospectus supplement06/12/25 424B5Prospectus supplement06/11/25

Proxies

DEFA14AAdditional proxy materials06/01/26 DEF 14ADefinitive proxy04/28/26 DEFA14AAdditional proxy materials04/28/26 PRE 14APreliminary proxy04/17/26 DEF 14ADefinitive proxy05/13/25

Ownership

SC 13G/ABeneficial ownership (amended)08/14/26 SC 13G/ABeneficial ownership (amended)08/14/26 SC 13G/ABeneficial ownership (amended)08/14/26 SC 13GBeneficial ownership08/12/26 SC 13G/ABeneficial ownership (amended)08/12/26

Other

ARSAnnual report to shareholders04/28/26 EFFECTRequest for effectiveness08/15/25 CORRESPCorrespondence with the SEC08/13/25 UPLOADLetter from the SEC08/13/25 ARSAnnual report to shareholders05/13/25