The Register and Books of Accounts shall be closed from 22nd August 2026 to 28th August 2026. (Inclusive of both days)

(An ISO 9001 : 2015 Company) Manufacturer of : Liquid & Gaseous Oxygen, Liquid & Gaseous Nitrogen, Liquid & Gaseous Nitrous Oxide, Liquid & Gaseous Medical Oxygen & Dissolved Acetylene Gas Regd. Office : S-1, 2nd Floor, Alsa Mall, New No.4 Old No.149, Montieth Road, Egmore, Chennai - 600 008. Ph : (044) 2852 0096 / 97 / 98 Fax : (044) 2852 0095 E-mail : sales @ nolgroup.com, contact@nolgroup.com, CIN No. L24111TN1974PLC006819 Date: 06" August, 2026 BSE Limited Phirozee Jeejeeboy Towers, Dalal Street, Fort, Mumbai - 400001 Scrip Code: BSE - 507813; ISIN: INE296D01010 Dear Sir/Madam, Subject: Intimation of Date of 515 Annual General Meeting (AGM), Book Closure, and Cut-off Date for e-Voting. Date of AGM: Pursuant to Regulation 30 of the SEBI (‘Listing Obligations and Disclosure Requirements’) Regulations, 2015 (‘Listing Regulations’), we wish to inform you that the 515t AGM of National Oxygen Limited (the Company) is scheduled to be held on Friday, 28th August, 2026 at 11.30 A.M (IST) through Video Conference (‘VC’)/Other Audio Visual Means (‘OAVM’) in accordance with relevant circular(s) issued by the Ministry of Corporate Affairs (MCA) and the Securities and Exchange Board of India (SEBI). The Annual Report for the Financial Year 2025-26, along with the Notice of the AGM has been sent only in electronic mode to all members whose email IDs are registered with the Company/Depository Participant(s). Book Closure: Itis further informed that pursuantto Regulation 42 of the Listing Regulations and Section 91 of the Companies Act, 2013 the Register of Members & Share Transfer Books of the Company will remain closed from Saturday, 22nd day of August 2026 to Friday, 28th day of August 2025 (both days inclusive) for the purpose oft he AGM. Cut-off Date for e-voting: Pursuant to Regulation 44 of the Listing Regulations, the Company has provided e-voting facility to the members to exercise their vote by electronic means for the resolutions set out in the Notice of AGM. The e-voting period commences on Tuesday, 25th August 2026 at 09:00 A.M. (IST) and ends on Thursday, 28t of August 2026 at 05:00 P.M. (IST). Breathing Life Into Industry FACTORY 1 R.S. No. 126/4 A, Pondy - Villupuram Road, Thiruvandar Koil, Puducherry - 605 102. Phone : (0413) 2640448 Fax : (0413) 2640181 E-mail : nolpondy @nolgroup.com FACTORY 2 : R-5, Sipcot Industrial Growth Centre, Perundurai, Erode - 638 052, Tamilnadu, Ph : (04294) 234145 E-mail : nolperundurai@ nolgroup.com FACTORY 3 Plot No.4, Sidco Industrial Estate - Mathur (New) Kainankarai, Mathur - 622515. Pudukottai Dist Mobile : 99400 82462 E-mail : nolt@ rnoligrcouph.cyom @ National Oxygen Limited Members holding shares in physical or in dematerialized form as on cut-off date of Cut-Off Date on Wednesday, 21¢ of August 2026 will be entitled for e-voting. This is for your information and records. Thanking You. Yours Faithfully, For NATIONAL OXYGEN LIMITED RAJESH KUMAR SARAF MANAGING DIRECTOR DIN: 00007353