Analysts/Institutional Investor Meet/Con. Call Updates

October 28, 2026 National Stock Exchange of India Limited BSE Limited Exchange Plaza Listing Operations Bandra-Kurla Complex, Bandra (E) P J Towers Dalal Street Mumbai-400051 Mumbai-400001 Symbol-ACI Scrip Code- 543657 Dear Sir/Madam, Subject: Intimation of Schedule for Earnings Call Reference: Regulation 30 read with Part A of Schedule III of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 Pursuant to Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we would like to inform you that the Earnings Call post announcement of the financial results of the Company for the quarter and half year ended September 30, 2026 is scheduled on Tuesday, November 03, 2026 at 02.30 PM IST. Earnings call invite and joining details are enclosed. The above information shall be made available on the website of the Company at www.archeanchemicals.com Kindly take on record the same. Thanking you Yours faithfully For Archean Chemical Industries Limited Vijayaraghavan NE Company Secretary and Compliance Officer M. No. A 41671 Corporate Office: SKCL Summit, No. 47/C3, 10th Floor, Gandhi Mandapam Road, Kotturpuram , Chennai – 600085 Registered Office: No.2, North Crescent Road, T Nagar, Chennai, Tamil Nadu, India – 600017 CIN: L24298TN2009PLC072270 | info@archeanchemicals.com | Ph: +91 44 - 610 99 999 | www.archeanchemicals.com Archean Chemical Industries Limited Cordially invites you to its Earnings Call To discuss the operational & financial performance for Q2 & H1 FY27 Day/Date: Tuesday, 03rd November 2026 Time: 02:30 PM IST Request you to please pre-register for the call on the below link: Click Here Access Numbers +91 22 6280 1309 Primary Number: +91 22 7115 8210 USA: 1 866 746 2133 UK: 0 808 101 1573 Toll Free Number: Singapore: 800 101 2045 Hong Kong: 800 964 448 Participants: Mr. Rampraveen Swaminathan – Managing Director Mr. Natarajan Ramamurthy – Chief Financial Officer Mr. Rajeev Kumar – DGM Finance We look forward to your participation RSVP Strategic Growth Advisors Pvt. Ltd., Mr. Shrikant Sangani/ Ms. Vaamaa Choksi Contact: +91 96195 95686/ +91 90222 08577