ESOP/ESOS/ESPS

SEC/241/2026 October 5, 2026 BSE Limited, National Stock Exchange of India Ltd., Corporate Relationship Department Listing Department Phiroze Jeejeebhoy Towers, Exchange Plaza, 5th Floor, Dalal Street, Bandra-Kurla Complex, Mumbai 400001. Bandra (E), Mumbai 400051. Scrip code: 542867 Symbol: CSBBANK Dear Sir/Madam, Grant of Stock options under CSB Bank Employee Stock Option Scheme 2026 -------------------------------------------------------------------------------------------------------------------------------- Pursuant to Regulation 30 of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform you that the Nomination & Remuneration Committee (“Committee”) of the Board of Directors of the CSB Bank Limited (the “Bank”), in its meeting held on October 5, 2026, has approved grant of 1,77,276 stock options (“Options”) to the Whole-time Directors of the Bank under CSB Bank Employee Stock Option Scheme 2026 (“Scheme”), exercisable into not more than 1,77,276 equity shares of face value of ₹10/- each fully paid-up of the Bank, at an exercise price of ₹ 304.75 (Rupees Three Hundred and Four and Seventy-Five Paise Only) per equity share. The disclosures required as per the SEBI (Share Based Employee Benefits and Sweat Equity) Regulations, 2021, read with the SEBI Master Circular No. SEBI/HO/49/14/14(7) 2025-CFD- POD2/I/3762/2026 dated January 30, 2026, are given below: a) Brief details of stock options granted 1,77,276 Options to the Whole-time Directors of the Bank as part of the variable pay for the performance period from April 1, 2025, to March 31, 2026, which is in line with the approval received from Reserve Bank of India on August 19, 2026. b) Whether the scheme is in terms of The Scheme has been formulated and SEBI (Share Based Employee Benefits approved by the Shareholders of the Bank and Sweat Equity) Regulations, 2021 pursuant to the provisions of the SEBI (Share [Erstwhile SEBI (Share Based Based Employee Benefits and Sweat Equity) Employee Benefits) Regulations, Regulations, 2021. 2014]. (if applicable); c) Total number of shares covered by 1,77,276 fully paid-up equity shares of the Bank these Options; of face value of ₹ 10/- each. d) Exercise Price The exercise price per option is ₹ 304.75 e) Pricing formula Granted at the latest available closing price prevailing on the National Stock Exchange of India Limited (“NSE”) being the Stock Exchange which recorded the highest trading volumes in the equity shares of the Bank on Thursday, October 1, 2026, i.e. being the previous trading day immediately preceding the date on which the grant of options was approved by the CSB Bank Limited Regd. Office: CSB Bhavan, St. Mary's College Road, Thrissur – 680020, Kerala, India. Tel: +91 487–2333020 | Fax: +91 487–2338764 | Website: www.csb.bank.in | Email: secretarial@csb.bank.in |CIN: L65191KL1920PLC000175 Committee. f) Options vested; The said options shall vest, as under: i. 25% of the options granted (rounded off to the nearest 100) shall vest on completion of 12 months from the grant date i.e. on October 5, 2027; ii. 25% of the options granted (rounded off to the nearest 100) shall vest on completion of 24 months from the grant date i.e. on October 5, 2028; iii. 25% of the options granted (rounded off to the nearest 100) shall vest on completion of 36 months from the grant date i.e. on October 5, 2029; iv. Balance options granted shall vest on completion of 48 months from the grant date i.e. on October 5, 2030. g) Time within which Option may be Exercise period while continuing employment/ exercised; service will be within 3 years from the date of vesting. Exercise period in case of separations will be as per the Scheme. h) Brief details of significant terms; All other terms are as per the Scheme. The meeting of the Nomination and Remuneration Committee of the Board of Directors of the Bank commenced at 11.00 a.m. and concluded at 11.20 a.m. This intimation is also made available on the website of the Bank at www.csb.bank.in. Kindly take the same on records. Thanking You, Yours faithfully, Sijo Varghese Company Secretary CSB Bank Limited Regd. Office: CSB Bhavan, St. Mary's College Road, Thrissur – 680020, Kerala, India. Tel: +91 487–2333020 | Fax: +91 487–2338764 | Website: www.csb.bank.in | Email: secretarial@csb.bank.in |CIN: L65191KL1920PLC000175