Revised Intimation Of Earnings Conference Call for all Investors/ General public with updated link

Date: 30th July, 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: Revised Intimation Of Earnings Conference Call with Investor(s)/Analyst(s) with updated Registration Link Dear Sir/Ma’am, Pursuant to Regulation 30(6) read with Para A of Schedule III of the Securities and Exchange Board of India (Listing Obligations and Disclosure Requirements) Regulations, 2015, we wish to inform that an Earnings Call for all Investors/ General public is scheduled to be held on Thursday, 6th August, 2026 at 2:00 PM (IST) to discuss Operational and Financial performance of the Company for Q1 FY27, as per details enclosed. The above information is also available on the website of the Company at www.deepiping.com. You are requested to kindly take the same on records. 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 THE MANAGEMENT OF DEE DEVELOPMENT ENGINEERS LIMITED INVITES YOU TO THE Q1 FY27 EARNINGS CALL Day/Date: Thursday, August 6th, 2026 Time: 2:00 PM IST Option 1 – Direct Call Pre-registration link CLICK HERE To enable the participants to connect to the conference call without having to wait for an operator, please register at the above-mentioned link. You will receive dial in numbers, passcode and a pin for the concall on the registered email address provided by you. Kindly dial into the call on the Conference Call date and use the passcode & pin to connect to call. Option 2 – Dial-in through Operator Assistance Access Numbers +91 22 6280 1341 Universal Access Number +91 22 7115 8242 The numbers listed above are universally accessible from all networks and all countries. International Toll-Free Numbers USA 18667462133 UK 080810 11573 Hong Kong 80096 4448 Singapore 80010 12045 Participants are requested to dial-in 5 minutes in advance Management Participants: For more information, please contact: Mr. Krishan Lalit Bansal – Chairman & Adfactors PR Pvt. Ltd. Managing Director Anand Venugopal / Ajinkya Salunke Mr. Brham Prakash Yadav – Chief Mobile: +91 7021852071 /+91 9136039920 Financial Officer Email: dee@adfactorspr.com 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