Certificate under SEBI (Depositories and Participants) Regulations, 2018

SIMPLEX INFRASTRUCTURES LIMITED REGD. OFFICE . AN ISO 9001 : 2015 'SIMPLEX HOUSE' 27. SHAKESPEARE SARANI. KOLKATA-700 017 (INDIA) certified company PHONES : +91 33 2301-1600. FAX +91 33 2289-1468 E-mail simplexkolkata@simflexmfra com Website www.simpiexintra.com CIN No. L45209 WB 1924 PLC 004969 Ol/CS/NSE/OO 1/95683 October 7,2026 The Manager, Listing Department The Secretary' National Stock Exchange of India Ltd. BSE Limited Exchange Plaza.Bandra Kurla Complex Phiroze Jeejeephoy Towers (Bandra East), Mumbai -400 051 Dalal Street, Mumbai-400001 Scrip code - SIMPLEX1NF Scip code - 523838 The Secretary The Calcutta Stock Exchange Limited 7, Lyons Range Kolkata-700 001 Scrip code - 29053 Sub: Compliance Certificate under Regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018 for the quarter ended 3011' September , 2026 Dear Sirs, We are enclosing herewith the Certificate received from M/s MCS Share Transfer Agent Ltd.., Kolkata, the Registrar and Share Transfer Agent of the Company, confirming compliance under regulation 74(5) of SEBI (Depositories and Participants) Regulations, 2018 during the quarter ended 30"' September, 2026. This is for your information anc record. Fhanking you. Yours faithfully. For SIMPLEX INFRASTRUCTURES LIMITED B.L.BAJORIA SR.VP & COMPANY SECRETARY Encl: As above BRANCHES : •HEMKUNTH" 4TH FLOOR. 89. NEHRU PLACE. NEW DELHI-110 019 X (011) 4944-4200. FAX (011) 2646-5869 • HEAVITREE COMPLEX. 1ST FLOOR. UNIT-C. NEW DOOR NO 47. SPURTANK ROAD. CHETPET. CHENNAI-600 031 a : (044) 4287-6129 eissis MCS Share Transfer Agent Limited 383 LAKE GARDENS lsr FLOOR KOLKATTA-TXXU5 IlK)ne Ncx Faxz-dMZZ^ Email nusfita^rediffiriaiLcotn Website wvvwnKsivgistrar&coin, ON NO.U67120WB2011 PLC165872 Date : 06/10/2026 SIMPLEX INFRASTRUCTURE LTD 27,Shakespeare Sarani Kolkata-700017 Dear Sir/Madam, Sub: Compliance Regarding Confirmation of Dematerialisation as per Regulation74(5) of (Depositories and Participants) Regulations,2018 We confirm having sent the Demat Transfer Register for the period 01/07/2026to30/09/2026 to the depository/depositories and as well as to all the Stock exchanges,where your Shares are listed. We also hereby confirm having Destroyed/Mutilated/Cancelled all the securities received from the concerned DPs after Dematerialisation within the stipulated time. For MCS Share Transfer Agent Ltd. OiglUllyMjrtd l>y TapailUy OW:c=IN.o.Penon«l —T— P''“‘*>nrn'.tpofl6ll8rt,ixl9)mM«Mn)50k74w,u, I -■> V-V | J » f ’■5.W«6(rt487«Jlfbf5J92fH56b59<i574dr|>ldti I dUdS 1 ✓ wa'NMmbw43b«10IQ0H<7«)MJ9cd6dlb«SJa<l S7S»640*7l9Kc9»4l8eJ73Wb0M04a, <n.T«N> m, O«e: 2O», 100114 J104 . 05-30 Authorized Signatory Name: TAPAS RAY