Certificate under Reg.74(5)

संदभ(cid:330) सं(cid:421)ा/Ref. No.: NBC/S/4.5 & 4.5(A)/2026/1449 िदनांक/Date: 08.10.2026 सेवा म(cid:336)/To सेवा म(cid:336)/ To (cid:366)बंधक/The Manager (cid:366)बंधक/ The Manager बीएसई िलिमटेड/BSE Limited िल(cid:304)(cid:720)ंग िवभाग/ Listing Department Phiroze Jeejeebhoy Towers National Stock Exchange of India Ltd. ए(cid:411)च(cid:336)ज (cid:600)ाजा/ Exchange Plaza दलाल (cid:720)(cid:332)ीट/Dalal Street बां(cid:363)ाकु ला(cid:330) कॉ(cid:817)(cid:600)े(cid:411)-/ Bandra-Kurla Complex मुंबई/MUMBAI -400 001 बां(cid:363)ा ई(cid:720)/Bandra East (cid:304)(cid:716)प कोड/ Scrip Code-532234 मु(cid:638)ई/MUMBAI-400 051 (cid:366)तीक/Symbol: NATIONALUM Sub: Certificate under Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018 for the quarter ended 30th September, 2026. िबगशेयर सिव(cid:330)सेज (cid:366)ा. िलिमटेड से (cid:366)ा(cid:593) पुि(cid:700) (cid:366)माणप(cid:361), िदनांक 08.10.2026 संल(cid:432) िकया गया है। Please find enclosed the certificate dated 08.10.2026 received from M/s. Bigshare Services Pvt. Ltd., Registrar and Share Transfer Agent (RTA) of the Company as per Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018, for the quarter ended 30th September, 2026. यह आपकी सूचना व अिभलेख हेतु है/This is for your information and record. ध(cid:586)वाद/Thanking you. भवदीय/Yours faithfully, For National Aluminium Co. Ltd. (बी. के . सा(cid:353))/(B. K. Sahu) Company Secretary & Compliance Officer ACS: 9953 Encl.: As above/ संल(cid:432) National Aluminium Company Limited (A Government of India Enterprise) REGD. & CORPORATE OFFICE Nalco Bhawan, Nayapalli, Bhubaneswar–751013,India CIN # L27203OR1981GOI000920 Tel.:0674-2301988-999, Ext.:2265, 2266, 2267, 2585, 2587, E-mail:company_secretary@nalcoindia.co.in,Website:www.nalcoindia.com Ref No. BSS/Reg 74(5)/2026 Date: 08/10/2026 NATIONAL ALUMINIUM COMPANY LIMITED NALCO BHAWAN, PLOT NO. P/1, NAYAPALLI BHUBANESWAR - 751013 Sub: Certificate under Regulation 74(5) of the SEBI (Depositories and Participants) Regulations, 2018 for the quarter ended 30th September 2026 Dear Sir, In reference to the above – captioned regulation we hereby confirm that the securities received from the depository Participants for dematerialization up to 30th September 2026 were confirmed (accepted/rejected) to the depositories by us and that securities comprised in the said certificates have been listed on the stock exchange where the earlier issued securities are listed. We hereby confirm that the security certificates received for dematerialization have been mutilated & cancelled after due verification by the depository Participant and the name of the depositories have been substituted in register of members as registered owner within 15 days of receipt of certificate of securities. We request you to kindly take note of the above in your records. Thanking you, Yours faithfully, For Bigshare Services Pvt. Ltd., Sandeep More Authorised Signatory