Analysts/Institutional Investor Meet/Con. Call 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: October 21, 2026 BSE Limited The National Stock Exchange of India Limited Phiroze Jeejeebhoy Towers Exchange Plaza, Bandra-Kurla Complex Dalal Street, Mumbai- 400001 Bandra (E), Mumbai – 400 051 Scrip code: 544292 Scrip code: ONESOURCE Dear Sir/ Madam, Subject: Earnings Call to discuss unaudited financial results of the Company for the quarter ended September 30, 2026 This is to inform you that Company has scheduled its Earnings Call with analysts/ investors on Tuesday, October 27, 2026, at 18:30 hrs IST to discuss unaudited financial results of the Company for the quarter ended September 30, 2026. Earnings Call details are enclosed for ready reference. 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 Encl: Invite for Earnings Call OneSource Specialty Pharma Limited info@onesourcecdmo.com | www.onesourcecdmo.com CIN: L74140MH2007PLC432497 OneSource Q2FY27 Earnings Call Tuesday, 27th October 2026, 06:30 PM IST OneSource Specialty Pharma Ltd. invites you to interact with the senior management on Q2FY27 earnings. Speakers: Neeraj Sharma, CEO & MD Anurag Bhagania, CFO Conference Call Details Dial in Details: For conference call, Tuesday 27th October 2026, 06:30 PM IST Universal Access +91 22 6280 1372 +91 22 7115 8193 DiamondPass Click Here (for early registration)