General Updates

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, 560076, India Navi Mumbai - 400703, India T: +91 80 6784 0738 T: +91 22 2789 2924 Date: November 05, 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 Participation in Jefferies Global Healthcare Conference, under Regulation 30 of SEBI (LODR) Regulations, 2015 Pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform you that the representatives of OneSource Specialty Pharma Limited will be participating in Jefferies Global Healthcare Conference, scheduled to be held from November 16, 2026 to November 19, 2026 in London. During these interactions, the Company’s representatives will discuss publicly available information including the business overview, strategy, industry trends and growth outlook as part of the regular investor engagement activities. Please note that no unpublished price sensitive information (UPSI) is proposed to be shared thereat. 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