Intimation of Audio Recording of Earnings call pertaining to the Unaudited Financial Results for the quarter ended June 30, 2026

Corporate Office: Registered Office: Star 1, Opp IIM Bangalore, Bilekahalli, Cyber One, Unit No. 902, Sector 30A Bannergha(cid:425)a Road, Bengaluru – Plot No - 4 & 6, Vashi, Navi Mumbai 560076, India 400703 India T: +91 80 6784 0738 F: +91 22 2789 2924 T: 91 22 2789 2942 Date: July 25, 2026 BSE Limited National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers Exchange Plaza, C-1, Block G, Dalal Street, Mumbai- 400001 Bandra Kurla Complex, Bandra (E), Mumbai – 400 051 Scrip Code: 544292 Symbol: ONESOURCE Dear Sir/ Madam, Subject: Intimation of Audio Recording of Earnings Call pertaining to the Unaudited Financial Results for the quarter ended June 30, 2026 Pursuant to Regulation 46 & 30 of SEBI (Listing Obligations and Disclosures Requirements) Regulations, 2015, we wish to inform you that the audio recording of Earnings Call held today i.e., July 25, 2026 at 10:00 hrs (IST) for discussing unaudited financial results of the Company for the quarter ended June 30, 2026, has been made available on our Company’s website at: https://www.onesourcecdmo.com/wp-content/uploads/2026/07/Earning_Call_Audio_Recording_for_Q1_FY27.mp3 You are requested to kindly take the same on record. For and on behalf of OneSource Specialty Pharma Limited Trisha A Company Secretary and Compliance Officer Membership Number: A47635 OneSource Specialty Pharma Limited Formerly Stelis Biopharma Limited info@onesourcecdmo.com | www.onesourcecdmo.com CIN: L74140MH2007PLC432497