Newspaper advertisement confirming the dispatch of the notice convening the 19th AGM of the Company and Remote e-voting

Corporate Office: Registered Office: Star 1, Opp IIM Bangalore, Bilekahalli, Cyber One, Unit No. 902, Sector 30A, Bannerghatta Road, Bengaluru – Plot No - 4 & 6, Vashi, 560076, India Navi Mumbai - 400703, India T: +91 80 6784 0738 T: +91 22 2789 2924 Date: September 01, 2026 BSE Limited National Stock Exchange of India Ltd Phiroze Jeejeebhoy Towers Exchange Plaza, C-1, Block G, Dalal Street Bandra Kurla Complex, Mumbai- 400001 Bandra (E), Mumbai – 400 051 Scrip Code: 544292, Symbol: ONESOURCE Dear Sir/ Madam, Subject: Newspaper Advertisement confirming dispatch of Notice of the 19th Annual General Meeting (AGM) and Remote e-voting We hereby enclose the copies of newspaper advertisements published in the English daily “Financial Express” and Marathi daily “Pudhari” on Monday, September 01, 2026 regarding the completion of dispatch of Notice of the 19th AGM. We request you to take the above 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 info@onesourcecdmo.com | www.onesourcecdmo.com CIN: L74140MH2007PLC432497