Intimation about publication of newspaper advertisement- Extract of unaudited Standalone and Consolidated 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, 560076, India Navi Mumbai - 400703, India T: +91 80 6784 0738 T: +91 22 2789 2924 F: +91 22 2789 2942 Date: July 26, 2026 BSE Limited National Stock Exchange of India Ltd Phiroze Jeejeebhoy Towers Exchange Plaza, C-1, Block G, Dalal Street, Mumbai- 400001 Bandra Kurla Complex, Bandra (E), Scrip Code: 544292 Mumbai – 400 051 Symbol: ONESOURCE Dear Sir/Madam, Subject: Newspaper Advertisement: Un-audited Financial Results for the quarter ended June 30, 2026 Pursuant to Regulation 47 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, please find enclosed herewith the copies of newspaper advertisement published on July 26, 2026 in the ‘Financial Express’ and ‘Lokmat’, providing extract of the Un-Audited Financial Results of the Company for the quarter ended June 30, 2026. This is for your information and records. For 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