Exhibit 99.1

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

April 7, 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:

Disclosure pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 – Sale of wholly owned subsidiary of the Company.

Pursuant to Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“SEBI Listing Regulations”), as amended, we wish to inform that Dr. Reddy’s Laboratories Limited (“The Company”), has today, i.e. April 7, 2026, entered into an agreement for sale of its entire shareholding in its wholly owned subsidiary, Svaas Wellness Limited.

Consequent to the completion of the transaction, Svaas Wellness Limited will cease to be a wholly owned subsidiary of the Company.

The requisite details as prescribed under Regulation 30 of the SEBI Listing Regulations, read with SEBI Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026, is enclosed herewith as Annexure.

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

Encl: as above

DR REDDYS LABORATORIES LTD 6-K