Trading Window

Date: 27th June, 2026 Listing Compliance Department BSE Limited The National Stock Exchange of India Ltd. Phiroze Jeejeebhoy Tower, Exchange Plaza, Plot No. C/1, G Block, Bandra Dalal Street, Kurla Complex, Bandra (E), Mumbai – 400001 Mumbai – 400051 Scrip Code: 544198 Symbol: DEEDEV Sub: Closure of Trading Window for dealing in Securities of the Company in terms of the SEBI (Prohibition of Insider Trading) Regulations, 2015 as amended (“SEBI PIT Regulations”) Dear Sir/ Madam, Pursuant to the Company’s Code of Conduct for Prevention of Insider Trading and Disclosure Practices (“Code”) and SEBI PIT Regulations, the Trading Window for dealing in securities of the Company shall remain closed for the Designated Persons i.e. Directors, Identified Employees/Persons, Key Managerial Personnel, Promoters of the Company including the Immediate Relatives of the Designated Persons of the Company and for the Connected Persons from Wednesday, 1st July, 2026 till 48 hours after the declaration of Un-audited Financial Results of the Company for the 1st quarter ending on 30th June, 2026 to the Stock Exchanges. The date of meeting of Board of Directors to approve the Un-audited Financial Results for the 1st quarter ending on 30th June, 2026 shall be informed to the Stock Exchanges in due course. The above information is already being informed to the Designated Persons (Directors, Promoters, Key Managerial Personnel and relevant employees etc.) and immediate relatives of the Designated Persons in accordance with the SEBI (Prohibition of Insider Trading) Regulations, 2015 and the Code of Conduct for Prevention of Insider Trading of the Company. This is for your information and records please. Thanking you, 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