Analysts/Institutional Investor Meet/Con. Call Updates

Date: 07th August, 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: Audio Recording of Earnings Call on Financial Results for the Quarter ended 30th June, 2026 Dear Sir/ Madam, Pursuant to Regula ion 30 and 46(2)(oa) of SEBI (Lis ing Obliga ions and Disclosure Requirements) Regula ions, 2015, the audio call recording of the Company’s Analyst t t t Call/Investor presentation held on Thursday, 06th August, 2026 to discuss the Un-Audited Financial Results of the Company for the Quarter ended 30th June, 2026 is available on the Company’s Website. The above information is being made available on the website of the Company at : https://www.deepiping.com/document/investor/audio/Investor_Call_on_06_August_202 6.mp3 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