Onesource Specialty Pharma Limited — Board/Management Information 2026

Jan 19, 2026

Star 1, Opp IIM Bangalore, Bilekahalli, Bannergha�a Road, Bengaluru – 560076, India T: +91 80 6784 0738

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Cyber One, Unit No. 902, Sector 30A, Plot No - 4 & 6, Vashi, Navi Mumbai - 400703, India T: +91 22 2789 2924 F: +91 22 2789 2942

Date: January 19, 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 Symbol: ONESOURCE

Dear Sir/ Madam,

Subject: Intimation of the Board meeting under Regulation 29 of the SEBI (Listing Obligations and Disclosures Requirements) Regulations, 2015

In terms of SEBI Listing Regulations, we wish to inform that a meeting of Board of Directors is scheduled to be held on Friday, January 23, 2026, to consider and approve the unaudited financial results (standalone and consolidated) of the Company for the quarter ended December 31,2025, amongst other matters.

Further, as per the provisions of the Company’s Code of Conduct under the SEBI (Prohibition of Insider Trading) Regulations, 2015, the trading window for the Designated Persons of the Company, for the quarter ended December 31, 2025, is closed from January 01, 2026 and shall open after 48 hours after the dissemination of the financial results by the Company.

You are kindly requested to take this information on record.

For and on behalf of OneSource Specialty Pharma Limited

Digitally signed Trisha A by Trisha A Date: 2026.01.19 11:13:43 +05'30'

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