Disclosure under reg 29(2) SAST, Regulation 2011

Date: 10th 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: Securities and Exchange Board of India (substantial Acquisition of Shares and Takeovers) Regulations 2011 Dear Sir/ Madam, This is to inform you that Company has issued 59,76,096 Equity Shares through Preferential Allotment to some allottees and as a result, shareholding of Mr. Krishan Lalit Bansal, Chairman & Managing Director has decreased by more than 2% of the post issue paid-up share capital of the Company as compared to earlier disclosure filed with NSE & BSE on 1st quarter ended 30.06.2026. Further we wish to submit that the Company has received listing & trading approval on 23.07.2026 and 28.07.2026 respectively. We are enclosing the disclosure as required under regulation 29(2) of the SEBI (Substantial Acquisition of Shares and Takeovers) Regulations, 2011. 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 Format for Disclosure under Regulation 29(2) of the SEBI (Substantial Acquisition of Shares and Takeovers) regulations, 2011 Part A- Details Name of the Target Company DEE Development Engineers Limited Name of the acquirer/ seller and PAC with Mr. Krishan Lalit Bansal, acquirer Chairman & Managing Director Whether acquirer/ seller belong to Promoter/ Yes Promoter Group Name of the Stock exchange(s) where shares BSE Limited & of TC are listed National Stock Exchange of India Limited Details of the acquisition/ disposal as Number % w.r.t total % w.r.t follows shares/ voting Total capital diluted wherever shares/ applicable voting capital of the TC Before the acquisition under consideration, holding of: a) Shares carrying voting rights 3,52,00,366 50.82 50.82 b) Shares in the nature of encumbrance (pledge/ lien/ nondisposal undertaking/ others) c) Voting rights (VR) otherwise than by shares d) Warrants/convertible securities/any other instrument that entitles the acquirer to receive shares carrying voting rights in the T C (specify holding in each category) Total (a+b+c+d) 3,52,00,366 50.82 50.82 Details of acquisition / sale a) Shares carrying voting rights acquired / 3,98,406 3.51 3.51 sold b) VRs acquired /sold otherwise than by shares c) Warrants/convertible securities/any other instrument that entitles the acquirer to receive shares carrying voting rights in the TC (specify holding in each category) acquired/sold d) Shares encumbered / invoked / released by the acquirer Total (a+ b + c+/-d) 3,98,406 3.51 3.51 After the acquisition / sale, holding of: a) Shares carrying voting rights acquired 3,55,98,772 47.31 47.31 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 b) Shares encumbered with the acquirer c) VRs otherwise than by shares d) Warrants / convertible securities / any other instrument that entitles the acquirer to receive shares carrying voting rights in the TC (specify holding in each category) after acquisition Total (a +b + c+ d) (Note: the percentage have been round off to 3,55,98,772 47.31 47.31 the nearest number) Mode of acquisition / sale (e.g. open market / Preferential allotment off-market / public issue / rights issue / preferential allotment / inter-se transfer etc). Date of acquisition / sale of shares / VR or Date of credit of shares after receipt of date of receipt of intimation of allotment of Listing Approval: 29.07.2026 shares, whichever is applicable Equity share capital / total voting capital of 69,26,33,420 comprising of 6,92,63,342 the TC before the said acquisition / sale Equity Share of face value of Rs. 10 /- each Equity share capital/ total voting capital of 75,23,94,380 comprising of 7,52,39,438 the TC after the said acquisition / sale Equity Share of face value of Rs. 10 /- each Total diluted share/voting capital of the TC 75,23,94,380 comprising of 7,52,39,438 after the said acquisition Equity Share of face value of Rs. 10 /- each Note: Total Share Capital/ Voting capital and diluted share/ voting capital to be taken as per the latest filling done by the company to the stock Exchange Diluted share/voting capital means the total number of shares in the TC assuming full conversion of the outstanding convertible securities/warrants into equity shares of the TC. 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