DEE Development Engineers Limited has informed the exchange about framework Agreement for supply to the Nuclear Power Sector.

Date: 16th October, 2026 Listing Compliance Department BSE Limited The National Stock Exchange of India Ltd. Phiroze Jeejeebhoy Tower, Exchange Plaza, Plot No. C/1, G Block, Dalal Street, Bandra Kurla Complex, Bandra (E), Mumbai – 400001 Mumbai – 400051 Scrip Code: 544198 Symbol: DEEDEV Sub: Disclosure under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“SEBI Listing Regulations”) – Framework Agreement for the Nuclear Power Sector Pursuant to Regulation 30 of SEBI Listing Regulations, we wish to inform that the Company has entered into a Framework Agreement with a domestic EPC contractor, for jointly pursuing business opportunities in the nuclear power sector. Under the Framework Agreement, the Company will act as a strategic partner to the EPC contractor and will provide pre-bid support, design and engineering, manufacturing, supply and sourcing of piping products, and related documentation. The details as required under SEBI Listing Regulations read with Master Circular no. SEBI/HO/CFD/PoD2/CIR/P/0155 dated November 11, 2024 are enclosed as Annexure I. This is for your information and record please. Yours faithfully, For DEE Development Engineers Limited Ranjan Kumar Sarangi Company Secretary and Compliance Officer Membership No.: F8604 Address: Unit 1, Prithla - Tatarpur Road, Village Tatarpur Dist. Palwal, Faridabad, Haryana – 121 102 DEE DEVELOPMENT ENGINEERS LIMITED Regd. Office: Unit 1, Prithla-Tatarpur Road, Village Tatarpur, Dist. Palwal, Haryana- 121102, India Works: Unit 1, 2 & 3, Village Tatarpur, Dist. Palwal, Haryana- 121102, India T: +91 1275 248200, F: +91 1275 248314, E: info@deepiping.com, W: www.deepiping.com CIN: L74140HR1988PLC030225 GST Registration No. 06AACCD0207H1ZA Annexure – I Disclosure of Information pursuant to Regulation 30 of the SEBI Listing Regulations read with SEBI Master Circular no. SEBI/HO/CFD/PoD2/CIR/P/0155 dated November 11, 2024: S.NO. PARTICULARS DETAILS a Name of the entity awarding the order(s) / For commercial and confidentiality contract(s) reasons, the Company is unable to disclose the name of the counterparty, which is an domestic EPC contractor. b Significant terms and conditions of Framework Agreement to jointly pursue order(s)/contract(s) awarded in brief business opportunities in the nuclear power sector in India, covering ongoing and upcoming projects of public sector and private sector developers (PHWR, LWR and SMR). Packages in focus: Nuclear Island (primary piping and common services) and Turbine Island (secondary cycle piping and light water systems). Products covered: pipes, pipe fittings, piping spools and forged pipes. Role of the Company (strategic partner): (i) pre-bid support, including budgetary offers and commercial and pricing inputs; (ii) design and engineering, including 3D modelling, piping general arrangement, isometrics, stress analysis, piping support design and drawings, material take-off and as-built drawings and models (iii) manufacturing, supply and sourcing of seamless and welded pipes, wrought and forged fittings, piping spools, flanges, custom bends, pipe supports, venturis, flow nozzles, restricted orifices and other piping components; and (iv) documentation, including quality assurance manual and plans, manufacturing, NDT and testing procedures, DEE DEVELOPMENT ENGINEERS LIMITED Regd. Office: Unit 1, Prithla-Tatarpur Road, Village Tatarpur, Dist. Palwal, Haryana- 121102, India Works: Unit 1, 2 & 3, Village Tatarpur, Dist. Palwal, Haryana- 121102, India T: +91 1275 248200, F: +91 1275 248314, E: info@deepiping.com, W: www.deepiping.com CIN: L74140HR1988PLC030225 GST Registration No. 06AACCD0207H1ZA progress schedules and end documentation. Role of the EPC contractor (primary EPC contractor): Sourcing enquiries, customer interaction, preparation of offers and finalisation of contracts in consultation with the Company, and all site activities, including field fabrication, erection, testing and commissioning. The Framework Agreement is not, by itself, an order or contract for supply. Any business will arise only when projects are awarded to the EPC contractor and definitive commercial terms are agreed. c Whether order(s) / contract(s) have been Domestic Entity awarded by domestic/ international entity d Nature of order(s)/ contract(s) Framework Agreement signed by both parties e Whether domestic or international Domestic f Time period by which the Not applicable. The Framework order(s)/contract(s) is to be executed Agreement does not fix an execution period. g Broad consideration or size of the Not applicable. The Framework order(s)/contract(s) Agreement carries no committed order value. Orders, if and when secured, will be disclosed separately as required. h Whether the promoter/ promoter group / Not applicable group companies have any interest in the entity that awarded the order(s)/contract(s)? If yes, nature of interest and details thereof i Whether the order(s)/contract(s) would fall Not applicable within related party transactions? If yes, the same is done at “arms’ length” DEE DEVELOPMENT ENGINEERS LIMITED Regd. Office: Unit 1, Prithla-Tatarpur Road, Village Tatarpur, Dist. Palwal, Haryana- 121102, India Works: Unit 1, 2 & 3, Village Tatarpur, Dist. Palwal, Haryana- 121102, India T: +91 1275 248200, F: +91 1275 248314, E: info@deepiping.com, W: www.deepiping.com CIN: L74140HR1988PLC030225 GST Registration No. 06AACCD0207H1ZA