Analysts/Institutional Investor Meet/Con. Call Updates

Date: September 21, 2026 BSE Limited National Stock Exchange of India Limited Listing & Compliance Department Listing & Compliance Department Phiroze Jeejeebhoy Towers, Exchange Plaza, C-1 Block G, Dalal Street, Mumbai - 400001 Bandra Kurla Complex, Bandra (E), Mumbai – 400051 Security Code : 544198 Symbol: DEEDEV Sub: Intimation of schedule of Investors/Analysts Plant Visit We wish to inform you, pursuant to Regulation 30 (6) of SEBI (Listing Obligations and Disclosure Requirements) Regulations, this is to inform you that the Company has organized a Plant Visit for Investors/Analysts at its Anjar Plant, Gujarat on Wednesday, 30th September, 2026. No confidential / Unpublished Price Sensitive Information (UPSI) will be shared during the plant visit. Please be informed that the above mentioned schedule is subject to changes, if any. Thanking you, 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