Addendum

Date: June 29, 2026 To, Listing Compliance Department Listing Compliance Department National Stock Exchange of India Limited BSE Limited Exchange Plaza, C-1 Block G, Phiroze Jeejeebhoy Towers Bandra - Kurla Complex, Bandra (East) Dalal Street, Mumbai - 400 051 Mumbai - 400 001 SCRIP CODE: 544333 SYMBOL: SETL Dear Sir/Madam, Sub: Addendum to the Investors Presentation dated June 25, 2026 in relation to the Proposed Acquisition of GScale Energy Private Limited Pursuant to Regulation 30 read with Schedule III of the SEBI (Listing Obligations and Disclosure Requirements) Regulations, 2015, as amended, and further to our disclosure dated June 25, 2026 regarding the proposed acquisition of up to 51% equity stake in GScale Energy Private Limited (“GScale”) by Standard Engineering Technology Limited (“the Company”), we wish to inform you that the Company is issuing an Addendum to the Investors Presentation providing further information on the strategic rationale, funding framework, operational roadmap, products manufactured by GScale and long-term growth opportunities associated with the proposed transaction. The enclosed Addendum to the Investors Presentation is intended to provide shareholders, investors, analysts and other stakeholders with supplementary information regarding the Company's strategic entry into the AI Datacenter Infrastructure sector through GScale Energy Private Limited. A copy of the Addendum to the Investors Presentation is enclosed herewith for your information and record. You are requested to kindly take the above information on record. Thanking you, Yours faithfully, For STANDARD ENGINEERING TECHNOLOGY LIMITED (Formerly known as Standard Glass Lining Technology Limited) Kallam Hima Priya Company Secretary & Compliance Officer Encl: A/a Standard Engineering Technology Limited (Formerly known as Standard Glass Lining Technology Limited) Registered Office: D-12, Phase -I, IDA Jeedimetla, Hyderabad-500055 Corporate Office: 10th Floor, PNR High Nest, Hydernagar, KPHB Colony, Hyderabad-500085 Manufacturing Unit: Survey No. 42/A, Alinagar, Chetlapotharam Village, Gaddapotharam, SangaReddy-502319 CIN: L29220TG2012PLC082904 Email: corporate@standardengtech.com Website: www.standardengtech.com Tel: + 040 3518 2204 A STRAT EG I C PAR TN ERSH I P Building what powers the AI revolution Standard Engineering is joining hands with GScale Energy to design and manufacture the power and cooling equipment behind India's AI Datacenters. Investor & Industry Briefing June 2026 Images used are for representation only; copyright owned by respective owners. T H E AI IN F R AST R U C T U R E SU PER C YC L E $5 trillion+ will be spent building the Datacenters behind AI by 2030. Every one of them depends on two things — power and cooling. That is exactly what SETL and Gscale Energy will manufacture, in India, at giga-watt scale. Source: McKinsey & Company, ‘The cost of compute: a $7 trillion race to scale Datacenters’, 2025. WHY THIS MATTERS NOW India sits at the heart of a $5 trillion build-out The capital flowing into AI Datacenters is staggering — and every facility needs power and cooling equipment. Most of it is still imported today or needs long lead time to supply. We intend to change that. $5 trillion+ INDIA DATACENTER CAPACITY (GW) Global spend on AI Datacenters by 2030 10.5 GW $60 billion To be invested in India's AI Datacenters by 2030 growth 1.3 GW in 5 yrs Power + Cooling = 50 - 60% Investment 2025 2030E $36 Billion is estimated to be invested in cooling and * Source: Morgan Stanley power infrastructure in India by 2030 GScale Energy designs & builds the same power and cooling infrastructure that is needed by India’s AI Datacenters LET’S START WITH A SIMPLE QUESTION Where does AI actually live? AI doesn't live in “the cloud.” It runs on millions of power- hungry chips inside real, physical Datacenter buildings. AI is exploding Every model is trained and run on clusters of GPUs — and the world needs far more of them every month. These chips run hot An AI rack can draw 10–250 KW power compare to an ordinary server running at less than 2 KW — and turns almost all of it into heat. So the limit is physical Inside a modern AI Datacenter The real bottleneck on AI isn't software. It's delivering power and removing heat (cooling), at massive scale. Datacenters are the factories of the AI age — power & cooling are their foundation. THE INVESTMENT CASE A rare combination of size, timing and capability Four things rarely come together at once. Here, they do. 01 02 A giant, early-stage market A proven operator at the helm A $40–50 bn India build-out, at the very start of a decade-long AI 486 MW already delivered and 1 GW+ under execution, led by a 25- infrastructure supercycle. year Datacenter veteran. 03 04 A full-stack, in-region moat Capital-light, self-funded The made-in-India platform that manufactures power and cooling and ₹487 Cr funded entirely from SETL's own cash — no new debt, fast builds the facility — under one roof. revenue. THE STRATEGIC RATIONALE Why SETL invested in Gscale Energy? India's AI build-out has a bottleneck: most of the power and cooling equipment is imported — slow, costly and hard to scale. SETL saw both a problem worth solving and a market worth leading. A huge adjacent market Instant domain leadership AI Datacenters need exactly the kind of precision, mission-critical Gscale Energy brings 25+ years of Datacenter DNA, 486 MW delivered engineering SETL has mastered for over a decade. and the operator relationships that take years to earn. A perfect capability fit Solving a national gap SETL's manufacturing muscle + Gscale Energy's design and customer Replacing imports with made-in-India power and cooling — faster access = a complete, full-stack platform. delivery, lower cost, strategic self-reliance. MEET THE BUILDER Standard Engineering: proven, trusted, profitable For over a decade, SETL has designed and built complex, mission-critical plants for India's pharmaceutical and chemical industries — where safety and reliability are everything. It already does the hard part: engineering critical infrastructure that simply cannot fail. 13 years ₹793 Cr 170+ 1.2M sq ft Building engineering plants since 2013 Revenue in FY2026, profitably grown Products across critical industries Manufacturing & engineering space Financially strong: ~₹220 Cr cash, CRISIL A/Positive rated — funding this entirely from its own resources. A PROVEN MAKE-IN-INDIA PLAYBOOK Japanese technology, made in India, supplied to the world SETL has already done what Gscale Energy now sets out to do — bring world-class technology to India, manufacture it locally, and supply it globally. Strategic tie-up with AGI (Asahi Glassplant) & GL HAKKO —a 75-year glass-engineering legacy. AGI invested Deep Japanese partnership ~₹200 Cr and is SETL's second-largest shareholder. A 20-year exclusive licence to manufacture glass-lined equipment that India previously imported 100% — World-firsts, made in India genuine import substitution. Now supplying the world The same partnership opens SETL's entry into Japan and global markets through private-label and co-branding. The same playbook for Gscale Localise advanced technology, manufacture at scale, export with confidence —now applied to AI Datacenter Energy equipment. Sources: AGI Japan / GL HAKKO partnership announcements; company disclosures (2023–2025). MEET THE EXPERT Two decades of Datacenter DNA — and the right moment to enter Gscale Energy is led by Mr. Brahma Reddy Kasu — a 25-year veteran who helped build India's Datacenter industry and was President of CtrlS, one of India's largest operators. The team enters manufacturing exactly as India's AI build-out accelerates — with the expertise, capacity and relationships to lead 25+ years in critical infrastructure A pioneer who helped shape India's modern Datacenter industry; former President of CtrlS. 486 MW delivered, 1 GW+ underway Led Tier-IV Datacenter delivery at an unpr [Showing first 8,000 characters — download PDF for full document]