Certificate under Regulation 74(5) of SEBI (Depositories & Participants) Regulations, 2018

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 7, 2026 National Stock Exchange of India Ltd. (Scrip Code: DRREDDY-EQ) BSE Limited (Scrip Code: 500124) Dear Sirs, Sub: Certificate under Regulation 74(5) of the SEBI (Depositories and Participants) Regulations, 2018 Pursuant to Regulation 74(5) of the SEBI (Depositories and Participants) Regulations, 2018, please find enclosed herewith a Confirmation Certificate received from the Registrar and Share Transfer Agent i.e. M/s. Bigshare Services Private Limited for the quarter ended September 30, 2026. This is for your information. Thanking you, Yours faithfully, For Dr. Reddy’s Laboratories Limited K Randhir Singh Company Secretary, Compliance Officer & Head-CSR Date: 07.10.2026 DR. REDDY'S LABORATORIES LTD 8-2-337, ROAD NO 3 BANJARA HILLS ITYDERABAI) PrN 500034 Dear Sir/lVladam, sub : certificate u$g Regulation of tle sEBI participants) ll(s) @epositories and r q Regutations,20rS for rhe quarter ended s.ptemi.i-3ii-;;;;.Eus Ref : NSDLlClRIIASt20lg dated 25th Janua ry,20l9 cDsl.,/opstRTA/poLrcy t2Ltgna datid25th Janua ry, 2019. SEBI vide its letter ref no. MRDIDOP2 msl.;,towtzotgtz4gvndated z4t[ttz[tg with reference to the captioned regulation, we hereby confirm that the securities ffiH"$.,I',#,;[J,T,'#"#,I:ilt#:f ;r*m5i,;h*;:ru:,ih j,Tlff and that securities comprised in the said certilicate -s have been listed on the stock exchange where the earlier issued securities are listed. We hereby confirm that the security certificates receiyed for dematerialisation have been mutilated & cancelled after ducverification by the deposito4y participant and the name of the Depositories have been substituted i, ..!irtri or m.-t.r, registered owner within 15 days. ", we request you to kindty take note of the above in your records. Thanking you, Yours faithfully, For Bigshare Services pvt Ltd 304 Right Ifllng Amrutha Ville, Opp. yashoda Hospital, SomaJiguda, Raf Bhavan Road, Hyderabad. 500082TeL 9L'40'2337 4967,23370295 Fax: 91,'40-2337ozss n.mait: bsshyd@btgshareonlne.com