Update on Credit Ratings.

Ref. No.: BBL/SEC/170/2026-27 September 28, 2026 BSE Limited National Stock Exchange of India Limited Dept. of Corporate Services The Listing Department Phiroze Jeejeebhoy Towers, Exchange Plaza, C-1, Block G, Dalal Street, Bandra Kurla Complex, Bandra (E), Mumbai - 400 001 Mumbai - 400 051 BSE Scrip Code: 541153 NSE Symbol: BANDHANBNK Dear Sir/Madam, Sub.: Disclosure under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 – Update on Credit Ratings Please be informed about the rating updates received from Crisil Ratings Limited (‘Crisil Ratings’), vide its communication dated September 28, 2026, on instruments of Bandhan Bank Limited (the ‘Bank’), as mentioned hereunder: Summary of rating action by Crisil Ratings: Instrument Rated Amount Rating Rating Action (Rs. in Crore) & Outlook Non-Convertible Debentures 230 CRISIL AA- / Stable Reaffirmed (Reduced from Rs. 1,295 Crore earlier)* Certificates of Deposit 6,000 CRISIL A1+ Reaffirmed *Crisil Ratings has withdrawn Rs. 1,065 Crore of Non-Convertible Debentures as the same was repaid and outstanding against it is Nil. The withdrawal is in line with the Crisil Ratings withdrawal policy. Rating Rationale as published by Crisil Ratings is available at the following link: https://www.crisilratings.com/mnt/winshare/Ratings/RatingList/RatingDocs/BandhanBankLimited_S eptember%2028_%202026_RR_405750.html. You are requested to take note of the above. This disclosure is being simultaneously uploaded at the Bank’s website, www.bandhan.bank.in. Thank you. Yours faithfully, for Bandhan Bank Limited Indranil Banerjee Company Secretary