DEE DEVELOPMENT ENGINEERS LIMITED — Regulatory Filings 2026

Mar 5, 2026

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Date: 05 March, 2026

Listing Compliance Department

BSE Limited Phiroze Jeejeebhoy Tower, Dalal Street, Mumbai – 400001 ScripCode:544198	The National Stock Exchange of India Ltd. Exchange Plaza, Plot No. C/1, G Block, Bandra Kurla Complex, Bandra (E), Mumbai – 400051 Symbol:DEEDEV

Sub: Disclosure under Regulation 30 of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015 (“SEBI Listing Regulations”)

Pursuant to Regulation 30 of SEBI Listing Regulations, we would like to inform that Material Subsidiary of the Company, M/s DEE Piping Systems (Thailand) Co., Ltd. has received a Letter of Intent for supply of HRSG piping for an International customer.

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

Digitally signed by Ranjan Kumar Ranjan Kumar Sarangi Sarangi Date: 2026.03.05 14:31:30 +05'30'

__________ 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

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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) / contract(s)	Due to commercial issue, the Company cannot disclose the name of the Customer.
b	Significant terms and conditions of order(s)/contract(s)awarded in brief	Prefabrication and Supply of Piping and Supports for Taiwan Project
c	Whether order(s) / contract(s) have been awarded bydomestic/international entity	International Entity
d	Nature of order(s)/ contract(s)	Order is for Supply and Fabrication of PipingMaterials
e	Whether domestic or international	International
f	Time period by which the order(s)/contract(s)is to be executed	By May 2027
g	Broad consideration or size of the order(s)/contract(s)	Approximately Euro 1.9 million (Euro One point 9 Million) equivalent to INR 20 Crores(Indian Rupees 20 Crores)
h	Whether the promoter/ promoter group / group companies have any interest in the entity that awarded the order(s)/contract(s)? If yes, nature of interest and details thereof	Not applicable
i	Whether the order(s)/contract(s) would fall within related party transactions? If yes, the same is done at “arms’ length”	Not applicable

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