Update on investment in Sicona Battery Technologies Pty Ltd

Ref. No: HSCL / Stock-Ex/2026-27/52 Date: 25/08/2026 E-mail: monika@himadri.com Ref: Listing Code: 500184 Ref: Listing Code: HSCL BSE Limited National Stock Exchange of India Ltd Department of Corporate Services Exchange Plaza, C-1, Block-G P. J. Towers, 25th Floor, Bandra Kurla Complex, Dalal Street, Bandra (E) Mumbai- 400 001 Mumbai- 400 051 Intimation under Regulation 30 of SEBI (Listing Obligations & Disclosure Requirements) Regulations, 2015 (“SEBI Listing Regulations”) – Update on investment in Sicona Battery Technologies Pty Ltd Dear Sir/ Madam, This has reference to our earlier announcement dated 13 May 2025, wherein the Board of Directors (“Board”) of the Company approved further investment in Sicona Battery Technologies Pty Ltd (“Sicona”) through the subscription of Compulsorily Convertible Notes (“CCNs”) in agreed tranches. We would like to inform you that the Company has already invested AUD 1,67,53,000 in cash towards the subscription of 1,67,53,000 CCNs of face value AUD 1.00 each. This is to further inform you that an investment of amount AUD 16,94,000, pertaining to the last tranche has been remitted in the form of cash towards the subscription of 16,94,000 CCNs of face value AUD 1.00 each. Consequently, the Company now cumulatively holds 1,84,47,000 CCNs in Sicona. Since the aforesaid investment is being made in the form of CCNs, the Company has not acquired any additional voting rights/ control in Sicona at present. The CCN will be convertible into shares of Sicona as per agreed terms. Further, the information as required under Regulation 30 read with Schedule III of the SEBI Listing Regulations read along with SEBI Master Circular no. SEBI/HO/CFD/PoD2/CIR/P/0155 dated November 11, 2024 has already been provided to the Stock Exchange(s) vide our letter Ref. No HSCL / Stock-Ex/2025-26/26, dated 13/05/2025 and there is no change in the said disclosure except as mentioned in this intimation. We request you to kindly take on record the same. Thanking you, Yours faithfully, For Himadri Speciality Chemical Ltd (Company Secretary & Compliance Officer) ACS: 29322