Disclosure under Regulation 30 of SEBI (LODR) Regulations, 2015

Dr. Reddy's Laboratories Ltd. 8-2-337, Road No. 3, Banjara Hills Hyderabad – 500 034, Telangana, India CIN: L85195TG1984PLC004507 Tel: + 91 40 4900 2900 Fax: + 91 40 4900 2999 Email: mail@drreddys.com Web: www.drreddys.com October 3,2026 National Stock Exchange of India Ltd. (Scrip Code: DRREDDY) BSE Limited (Scrip Code: 500124) New York Stock Exchange Inc. (Stock Code: RDY) NSE IFSC Ltd (Stock Code: DRREDDY) Dear Sir/Madam, Sub: Intimation under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 This is to inform that Dr. Reddy’s Laboratories, Inc. (“DRL Inc”), a step-down wholly owned subsidiary of the Company, received final transcript dated September 25, 2026, from Department of the Treasury, Internal Revenue Service, Cincinnati, OH, US (“IRS”) on Oct 2,2026 classifying an amount $32,350.20 as a penalty levied by IRS. The details as required under Regulation 30 of SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 read with Schedule III Para A Sub Para 20 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 are as hereunder: Name of the authority Department of Treasury, Internal Revenue Service, Cincinnati, OH, US Nature and details of the action(s) taken, Penalty amount of $32,350.20 due to initiated or order(s) passed misclassification of Fiscal year reference at the time of tax payment. Date of receipt of direction or order, Transcript dated Sept 25,2026 was received by including any ad-interim or interim orders, DRL Inc. on Oct 2,2026. or any other communication from the authority Details of the violation(s)/ Penalty due to misclassification of Fiscal year contravention(s) committed or alleged reference at the time of tax payment. to be committed Impact on financial, operation or other Based on our evaluation, there is no material activities of the listed entity, quantifiable in impact on financials, operations or other activities monetary terms to the extent possible of the Company. This is for your information and record. Thanking you. Yours faithfully, For Dr. Reddy’s Laboratories Limited K Randhir Singh Company Secretary, Compliance Officer and Head-CSR