DEE DEVELOPMENT ENGINEERS LIMITED — Regulatory Filings 2026

Feb 6, 2026

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Date: 6[th] February, 2026

Listing Compliance Department

BSE LimitedPhiroze Jeejeebhoy Tower,Dalal Street,Mumbai – 400001ScripCode:544198	The National Stock Exchange of India Ltd.Exchange Plaza, Plot No. C/1, G Block,Bandra Kurla Complex, Bandra (E),Mumbai – 400051Symbol: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 Wholly Owned Subsidiary of the Company, M/s DEE Fabricom India Private Limited has received a email with intent for supply of Wind mill towers which is the highest value order in the history of the WOS.

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 Digitally signed by Ranjan Kumar Sarangi Date: 2026.02.06 13:32:03 Sarangi +05'30'

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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:

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----- Start of picture text ----- S.NO. PARTICULARS DETAILSa Name of the entity awarding the order(s) / Due to commercial issue, the Companycontract(s) cannot disclose the name of the Customer.b Significant terms and conditions of Supply of Windmill Towerorder(s)/contract(s) awarded in briefc Whether order(s) / contract(s) have been Domestic Entityawarded by domestic/ international entityd Nature of order(s)/ contract(s) email for supply of Windmill Towere Whether domestic or international Domesticf Time period by which the May 2026 to January 2027order(s)/contract(s) is to be executedg Broad consideration or size of the Approximately Rs. 90 Croresorder(s)/contract(s)h Whether the promoter/ promoter group / Not applicablegroup companies have any interest in theentity that awarded theorder(s)/contract(s)? If yes, nature ofinterest and details thereofi Whether the order(s)/contract(s) would fall Not applicablewithin related party transactions? If yes, thesame is done at “arms’ length”----- End of picture text -----

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