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: September 11, 2026 BSE Limited National Stock Exchange of India Ltd Phiroze Jeejeebhoy Towers Exchange Plaza, C-1, Block G, Dalal Street Bandra Kurla Complex, Bandra (E) Mumbai- 400001 Mumbai – 400 051 Scrip Code: 544292 Symbol: ONESOURCE Subject: Addendum to the Notice of the 19th AGM scheduled to be held on September 23, 2026 Dear Sir/Madam, Please find enclosed herewith an Addendum to the Notice of the AGM dated July 24, 2026, being issued by the Company, which will form an integral part of the Notice. The said Addendum has also been uploaded on the website of the Company and is being submitted to the Stock Exchange for information and records. For OneSource Specialty Pharma Limited Trisha A Company Secretary and Compliance Officer Membership Number: A47635 Encl.: Addendum to AGM Notice dated July 24, 2026 OneSource Specialty Pharma Limited info@onesourcecdmo.com | www.onesourcecdmo.com CIN: L74140MH2007PLC432497 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 Addendum to the Statement pursuant to Section 102(1) of the Companies Act, 2013 forming part of the Notice dated July 24, 2026 convening the 19th Annual General Meeting of the Company OneSource Specialty Pharma Limited (‘Company) has issued the Notice of 19th Annual General Meeting (‘AGM”) of the Company on Monday, August 31, 2026 for the meeting to be held on Wednesday, September 23, 2026 at 17:00 hours (IST) through Video Conferencing (VC). Further, the Company would like to disclose the following additional information in the Statement pursuant to Section 102(1) of the Companies Act, 2013 forming part of the Notice of 19thAGM in respect of Item No.6 & 7 - Approval of material related party transactions (RPTs) of the Company with Strides Pharma Science Limited and Strides Pharma Inc, USA, (Wholly owned subsidiary (WOS) of Strides Pharma Science Limited). Additional disclosures as required under the Industry Standards pertaining to Item 6 and 7 of the AGM Notice  The Audit Committee has reviewed the certificates provided by the CEO / CFO of the Listed Entity as required under the RPT Industry Standards. The aforesaid communication forms as integral part of the AGM Notice and is also available on the Company's website at www.onesourcecdmo.com, website of the Stock Exchanges i.e., BSE Limited and National Stock Exchange of India Limited at www.bseindia.com and www.nseindia.com, respectively. The Notice of AGM hereinafter shall be read in conjunction with this communication. All other content of the Notice of AGM, save and except as modified by the aforesaid communication shall remain unchanged. For 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