This is to inform you that, as per Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we hereby inform that the Company has scheduled investor interaction through a teleconference call on Thursday, 5 November 2026 at 2:00 p.m. (IST), post the announcement of financial results for the quarter and six months period ended 30 September 2026. Details for joining the call are attached herewith.

28 October 2026 To, To, BSE Limited National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers, Exchange Plaza, Dalal Street, Bandra - Kurla Complex, Mumbai 400 001 Bandra (E), Mumbai 400 051 Scrip Code: 524669 Symbol: HESTERBIO Dear Sir/ Madam: Subject: Intimation of earnings conference call This is to inform you that, as per Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we hereby inform that the Company has scheduled investor interaction through a teleconference call on Thursday, 5 November 2026 at 2:00 p.m. (IST), post the announcement of financial results for the quarter and six months period ended 30 September 2026. Details for joining the call are attached herewith. You are requested to take the above on record. Sincerely For Hester Biosciences Limited Vinod Mali Company Secretary & Compliance Officer Enclosure: As above is pleased to invite you to the Q2 & H1 FY27 Results Conference Call Hester Biosciences Limited Represented by Mr. Rajiv Gandhi, CEO & Managing Director Ms. Priya Gandhi, Executive Director Mr. Ashish Desai, Chief Financial Officer Thursday, November 5, 2026 at 14:00 hrs India Time Diamond Pass registration link: Copy this Link in your browser: Link Call Co-ordinator: Mr. Abdulkader Puranwala: Phone: +91 22 6807 7339, e-mail: abdulkader.puranwala@icicisecurities.com Ms. Nisha Shetty: Phone: +91 22 6807 7339, e-mail: nisha.shetty@icicisecurities.com For any clarification, please contact: Mr. Rushad Kapadia: Phone: +91 22 6807 7334, e-mail: rushad.kapadia@icicisecurities.com Ms. Seema Sehgal: Phone: +91 9871116926, e-mail: seema.sehgal@icicisecurities.com Ms. Minali Ginwala: Phone: +91 22 6807 7454, e-mail: minali.ginwala@icicisecurities.com