Resignation

~$Biocon Biocon Limited 20th KM, Hosur Road Electronic City Bangalore 560 100, India T 91 80 2808 2808 F 91 80 2852 3423 CIN : L24234KA1978PLC003417 www.biocon.com BIO/SECL/TG/2026-27/54 August 06, 2026 To, To, The Manager The Manager BSE Limited National Stock Exchange of India Limited Department of Corporate Services Corporate Communication Department Phiroze Jeejeebhoy Towers, Exchange Plaza, Bandra Kurla Complex Dalal Street, Mumbai – 400 001 Mumbai – 400 051 Scrip Code – 532523 Scrip Symbol – BIOCON Dear Sir/ Madam, Subject: Resignation of statutory auditors of material subsidiary Pursuant to Regulation 30 read with Part A of Schedule III of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015 (‘SEBI Listing Regulations’), we hereby inform that B S R & Co. LLP, Chartered Accountants, having Firm Registration No. 101248W/W100022, Statutory Auditors of Biocon Biologics Limited (‘BBL’), material subsidiary of the Company, have tendered their resignation as Statutory Auditors of BBL vide their letter dated August 06, 2026. A copy of the resignation letter received from B S R & Co. LLP is enclosed herewith. Details required under Regulation 30 of the SEBI Listing Regulations read with SEBI Circular No. HO/49/14/14(7)2025-CFD-POD2/I/3762/2026 dated January 30, 2026, are enclosed herewith as ‘Annexure The above information will also be available on the website of the Company at www.biocon.com. Kindly take the above information on record and acknowledge. Thanking You, Yours faithfully, For Biocon Limited Rajesh U. Shanoy Company Secretary and Compliance officer ICSI Membership Number: A16328 ~$Biocon ANNEXURE A Details as required under the 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: Sl. No. Particulars Details 1. Name B S R & Co. LLP, Chartered Accountants, Statutory Auditors of Biocon Biologics Limited, material subsidiary of the Company 2. Reason for change viz. appointment, re- Resignation appointment, resignation, removal, death or otherwise (To align the Statutory Auditors of Biocon Biologics Limited, material subsidiary, with the Statutory Auditors of the Company, due to mandatory rotation of B S R & Co. LLP, Chartered Accountants, as Statutory Auditors of the Company). 3. Date of appointment/re- Resigned with immediate effect (resignation appointment/cessation (as applicable) & letter received at 4.40 p.m. on August 06, 2026. term of appointment/re-appointment 4. Brief profile Not Applicable (in case of appointment) 5. Disclosure of relationships between Not Applicable directors (in case of appointment of a director) 8 SR & Co. LLP Embassy Golf Links Business Park Pebble Beach, B Block, 3rd Floor Chartered Accountants No. 13/2, Off Intermediate Ring Road Bengaluru - 560 071, India Telephone + 91 80 4682 3000 Fax + 91 80 4682 3999 The Board of Directors, Biocon Biologics Limited Biocon House, Ground Floor, Tower-3, Semicon Park, Electronic City Phase - II Bengaluru-560100 6 August 2026 Dear Sirs, Subject: Resignation with immediate effect As you are aware, we were appointed as the Statutory Auditors ofBiocon Biologics Limited ('the Company'), pursuant to the shareholder's resolution dated 26 July 2022 to hold office until the conclusion of the annual general meeting to be held in respect of the financial year ending 31 March 2027. We have completed our statutory audit till 31 March 2026 and issued our audit report dated 7 May 2026. Further, we have completed our limited review for the quarter ended 30 June 2026 and issued our limited review report dated 5 August 2026. Please refer to our ongoing discussions in connection with our continuation as statutory auditors of the Company. As per discussions, management intends to align the auditors of the Company with the auditors of Biocon Limited, the holding company, due to mandatory rotation of our firm as auditors of the holding company under the Companies Act, 2013. In view of the above, we would not be in a position to continue as statutory auditors of the Company for the financial year ending 31 March 202 7. We have also discussed th is matter with the Management of the Company. Please find attached completed Annexure A, with regard to the information to be obtained by the Company from the auditors for the resignation as required by Section V-D of SEBI Master circular no. SEBI/HO/49/14/14(7)2025-CFD-PoD2/I/3762/2026 dated 30 January 2026, pertaining to 'Resignation of statutory auditors from listed entities and their material subsidiaries'. As per the requirement of the Companies Act, 2013, we shat 1 be forwarding the copy of the ADT- 3, as filed with ROC, in due course. 8 S R ,!!:. C:o r~ p~rtr,l:!:rship firm with Re~i::.lr.!!tion :\!c 8A'i 122J) con·1e:!r\~Q into BS Regi~tcred Office: R ~ Ca LL~ (;;i Lirnih:d Li.ability Pau1r1ersti1p with LLP Rcgisu·,1tion Mo AAB-8·181} 14tl1 Fl ;;,or, G~ntl".JI B Wing :t11d :'<Jorth C '!,"•Jing, Ni:::!!.0::11 tl Park <-1, NE~r;Q CF;-ntf!-i, W~stero Express with cffci:;t from OctobP.f 1 :l, 201J HP9tri·.-vay, Go,egaon !E.a::;t). Mumb.'.li -400fltJ BS R& Co. LLP Please accept our resignation with immediate effect. Yours faithfully, ForBSR& Co.LLP Chartered Accountants ICAI Fi R istration Number: 101248W/W-100022 Pa ner Membership No. 063980 Place: Bengaluru Date: 6 August 2026 BS R & Co. LLP AnnexureA Disclosure of information from the statutory auditor upon resignation Sr. Particulars Details 1. Name of the listed entity/ material subsidiary Biocon Biologics Limited 2. Details of the statutory auditor: a. Name B SR& Co. LLP b. Address Embassy Golf Links Business Park, Pebble Beach, B Block, 3rd Floor, No. 13/2, off lntennediate Ring Road, Bengaluru -560 071, India C. Phone Number +91 80 4682 3000 d. Email sshanna l@bsraffiliates.com 3. Details of association with the listed entity/ material subsidiary: a. Date on which the statutory auditor 26 July 2022 was appointed b. Date on which the tenn oft he statutory Conclusion of 11th Annual General Meeting after auditor was scheduled to expire the financial year ended 31 March 2027 C. Prior to resignation, the latest audit Audit report for year ended 31 March 2026 dated report/limited review report 7 May 2026 and submitted by the auditor and date of its Consolidated Interim Financial Statements submission Limited Review Report for the quarter ended 30 June 2026 dated 05 August 2026 4. Detailed reasons for resignation: Refer to the attached resignation letter 5. In case of any concerns, efforts made by the Not applicable auditor pnor to resignation (including approaching the Audit Committee/Board of Directors along with the date of comm uni cation made to the Audit Committee/Board of Directors) 6. In case the information requested by the auditor was not provided, then following shall be disclosed: a. Whether the inability to obtain Not applicable sufficient appropriate audit evidence was due to a management - imposed limitation or circumstances beyond the control of the management. b. Whether the lack of infonnation would Not applicable have significant impact on the financial statements/results. C. Whether the auditor has performed Not applicable alternative procedures to obtain B SR &Co. LLP Sr. Particulars Details appropriate evidence for the purposes of audit/limited review as laid down in SA 705 (Revised) d. Whether the lack of infonnation was Not applicable prevalent in the previous reported financial statements/results. lf yes, on what basis the previous audi t/1 im ited review reports were issued. 7. Any other facts relevant to the resignation: Not applicable Declaration: I. We hereby confirm that the infonnation given in this letter and its attachments is correct and complete. 2. We hereby confirm that there is no other material reason other than those provided above for resignation ofmy firm. Yours faithfully, For BS R& Co. LLP Chartered Acco ntants 1 I [Showing first 8,000 characters — download PDF for full document]