Copy of Newspaper Publication

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: August 29, 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) Scrip Code: 544292, Mumbai – 400 051 ISIN: INE013P01021 Symbol: ONESOURCE Dear Sir/ Madam, Subject: Newspaper Advertisement regarding the 19th Annual General Meeting of the Company Pursuant to the provisions of the Companies Act, 2013, the applicable Rules made thereunder, the General Circular No. 20/2020 dated May 05, 2020, and 03/2025 dated September 22, 2025 (hereinafter referred to as “Circulars”) issued by the Ministry of Corporate Affairs (“MCA”) and the applicable provisions of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, (“SEBI Listing Regulations”), we wish to inform you that the Company has published newspaper advertisements informing Shareholders about 19th Annual General Meeting of the Company scheduled to be held on Wednesday, September 23, 2026, at 17:00 Hours (IST) through Video Conferencing (“VC”)/ Other Audio Visual Means (“OAVM”). Copies of the newspaper advertisements published in English daily “Financial express” and Marathi daily “Pudhari” on Saturday, August 29, 2026, are enclosed herewith and the same is also available on website of the Company www.onesourcecdmo.com. This is for your information and records. For and on behalf of OneSource Specialty Pharma Limited Trisha A Company Secretary and Compliance Officer Membership Number: A47635 Encl.: As above OneSource Specialty Pharma Limited info@onesourcecdmo.com | www.onesourcecdmo.com CIN: L74140MH2007PLC432497 tradingref.com