Kindly refer the enclosed attachment

IDFCFIRSTBANK/SD/133/2026-27 September 03, 2026 National Stock Exchange of India Limited BSE Limited Mumbai 400 051 Mumbai 400 001 NSE Symbol: IDFCFIRSTB BSE Scrip Code: 539437 Sub: Disclosure under Regulation 30 of the SEBI Listing Regulations, 2015 Dear Sir / Madam, We are pleased to inform you that IDFC FIRST Bank has successfully mobilized gross amount of ~USD 3.57 billion (~₹ 33,975 crores) from NRI customers under the RBI's FCNR(B) swap window. This represents about 11% of the deposit base as on June 30, 2026. The Bank's IFSC Banking Unit (IBU) facilitated ~USD 2.60 billion (~₹ 24,720 crores) of lending during the period. Note: INR equivalents are provided for ease of reference and are based on the exchange rate prevailing as on August 31, 2026. FCNR(B) mobilisation figures are provisional and unaudited. You are requested to take the same on record. Thanking You, Yours faithfully, For IDFC FIRST Bank Limited Satish Gaikwad General Counsel and Company Secretary IDFC FIRST Bank Limited Corporate Office: IDFC FIRST Bank Tower, (The Square), C-61, G Block, Bandra-Kurla Complex, Bandra (East), Mumbai - 400 051, Maharashtra. Tel: +91 22 7132 5500 Registered Office: KRM Tower, 7th Floor, No. 1, Harrington Road, Chetpet, Chennai 600 031, Tamil Nadu. Tel: +91 44 4571 6477 CIN: L65110TN2014PLC097792 | E-mail: bank.info@idfcfirstbank.com; | Website: www.idfcfirst.bank.in