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© 2025 NANO Nuclear Energy, Inc. All rights reserved. NANO Nuclear Energy Drilling Milestone Ceremony and Investor Event Presentation October 24 th 2025 1
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Cautionary Note Regarding Forward -Looking Statements This presentation and statements of NANO Nuclear’s management in connection with this presentation contain or may contain "forward-looking statements" within the meaning of Section 21E of the Securities Exchange Act of 1934, as amended, and the Private Securities Litigation Reform Act of 1995. In this context, forward-looking statements mean statements related to future events, plans, objectives, and goals which may impact our expected future business and financial performance, and often contain words such as “seek,” "expects", "anticipates", "intends", "plans", "believes", “potential”, "will", "should", "could", "would" or "may" and other words of similar meaning. Specifically, forward-looking statements include those related to our anticipated timelines for development, demonstration, regulatory approval and commercialization of our products, technologies and services. These and other forward-looking statements are based on information available to us as of the date of this presentation and represent management's current views and assumptions. Readers are cautioned that forward-looking statements are not guarantees of future performance, events or results and should not be relied upon as a predictor of actual results. Forward-looking statements involve significant known and unknown risks, uncertainties and other factors, some of which may be beyond our control. Readers are also cautioned that actual results may differ materially and adversely from the results implied in forward-looking statements. For NANO Nuclear, particular risks and uncertainties that could cause our actual future results to differ materially from those expressed in our forward-looking statements include but are not limited to the following: (i) risks related to our U.S. Department of Energy (“DOE”) or related state or non-U.S. nuclear licensing submissions, (ii) risks related the development of new or advanced technology and the acquisition of complimentary technology or businesses, including difficulties with design and testing, cost overruns, regulatory delays, integration issues and the development of competitive technology, (iii) our ability to obtain contracts and funding to be able to continue operations, (iv) risks related to uncertainty regarding our ability to technologically develop and commercially deploy a competitive advanced nuclear reactor or other technology in the timelines we anticipate, if ever, (v) risks related to the impact of U.S. and non-U.S. government regulation, policies and licensing requirements, including by the DOE and the U.S. Nuclear Regulatory Commission, including those associated with the recently enacted ADVANCE Act and the May 23, 2025 executives orders seeking to streamline the nuclear regulatory process, and (vi) similar risks and uncertainties associated with the operating an early stage business a highly regulated and rapidly evolving industry.. Readers are further cautioned not to place undue reliance on our forward-looking statements, which apply only as of the date of this presentation. These factors may not constitute all of the factors that could cause actual results to differ from those discussed in any forward-looking statement, and we therefore encourage investors to review other factors that may affect future results in the our filings with the SEC, which are available for review at www.sec.gov and at https://ir.nanonuclearenergy.com/financial-information/sec-filings. We do not undertake to update our forward-looking statements to reflect events or circumstances that may arise after the date of this presentation, except as required by law. 2 nanonuclearenergy.com © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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Agenda I n t r o d u c t o r y R e m a r k s • Susan Martinis, Vice Chancellor for Research & Innovation, University of Illinois • Jay Yu, Founder, Executive Chairman and President, NANO Nuclear Energy N A N O N u c l e a r E n e r g y R e m a r k s • James Walker, CEO, NANO Nuclear Energy • Florent Heidet, CTO and Head of Reactor Development, NANO Nuclear Energy U n i v e r s i t y o f I l l i n o i s R e m a r k s • Rashid Bashir, Dean, The Grainger College of Engineering, University of Illinois • Caleb Brooks, Professor and Donald Biggar Willet Faculty Scholar, University of Illinois A d d i t i o n a l G u e s t S p e a k e r s • Paulo Mesiti, Director, Nuclear Projects, Hatch • Peter Tawfik, Director, Nuclear Operations, PCL Construction • Matt O’Hare, CDCS, Managing Director Power Construction and VP AFCOM Chicago • Derek Matthews, CSO, BaRupOn LLC • Vice Admiral Joe Leidig, Jr., U.S. Navy (Ret.) – NANO Nuclear Executive Advisory Board • General Wesley K. Clark, U.S. Army (Ret.) – NANO Nuclear Executive Advisory Board A u d i e n c e Q & A C l o s i n g R e m a r k s nanonuclearenergy.com 3 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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Introductory Remarks Susan Martinis, Vice Chancellor for Research and Innovation at University of Illinois 4 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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Introductory Remarks Jay Yu, Founder, Executive Chairman and President, NANO Nuclear Energy 5 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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AECOM Drilling First Step Toward First KRONOS MMR Prototype 6 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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nanonuclearenergy.com NANO Nuclear Has the Tech, Capital, and Team to Deliver KRONOS MMR Differentiated & De-Risked Well-Capitalized & Supported by Leading Institutions Management Team with Experience in Nuclear • High TRL & more than $120M invested in design over an 8-year period • Well known HTGR tech with many patents • Advancing in U.S. & Canada’s licensing processes • Raised more than $600M to date since IPO, have ~$580M on balance sheet • Additional $900M shelf with leading banks under SEC review • Growing institutional shareholder base • Management team & Executive Advisory Board with diverse background in nuclear industry and government • Including many years of experience at NRC, DOE, & Military 7 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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NANO Nuclear’s Differentiated Strategy, Key Partnerships & Policy Support James Walker, CEO 8 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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Microreactors - The Future of Nuclear Energy • Increased potential for economies of scale driven by modularity, mass production, factory fabrication, and large-scale deployment. • Ability to scale cost effectively based on customer ramp plans. • Substantially less safety risk relative to traditional reactors and some SMRs due to several factors. • Ability to co-locate at customer sites, providing the option for projects to operate independently off the grid to enable 24/7 baseload power. • Modularity to enable learnings and significantly less on-site construction relative to Traditional Reactors and some SMRs, reducing the likelihood of substantial cost over runs. Energy Source Economies of Scale? Ability to Scale Cost Effectively? Minimal Safety Risk? Ability to Co-locate? Fully Modular & Assembled at Site? Traditional Nuclear Small Modular Reactors (SMRs) Microreactors nanonuclearenergy.com 9 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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NANO Nu clear See ki ng Ve rtical Integration to De -Ri sk Reactor Deployment Uranium Mining Uranium milled into Yellow Cake Yellow Cake converted to UF6 gas Fuel Fabricated From Enriched UF6 UF6 Enriched to increase the concentration of U-235 Fuel Used for Nuclear Energy Production nanonuclearenergy.com 10 Fuel transport capabilities needed throughout the cycle Primary Steps of t he Nu clear Fuel Cycle © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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Strategic Collaborations, Project Supporters, and Government Support Enabling Success nanonuclearenergy.com Key Project Supporters • Strong policy support highlighted by recent REV agreement • Unmatched nuclear infrastructure, workforce, and environment for a first-of-a-kind microreactor Unprecedented Federal Bipartisan Support • Recent Presidential EO’s signaling new phase of regulatory momentum by directing the NRC, DOE & DOD to support reactor development and deployment University of Illinois • U of I provides credibility, nuclear engineers, technical capabilities, and licensing/stakeholder support • Partnership a model for commercial deployment nationwide State of Illinois • Hatch & PCL bring decades of proven experience in complex infrastructure delivery • Capabilities include engineering, procurement, construction, construction management, long lead component delivery 11 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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KRONOS MMR Technology Overview & Compelling Value Proposition Florent Heidet, CTO & Head of Reactor Development 12 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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Standard Design Characteristics Materials Coolant Helium Fuel TRISO Enrichment 9.9% Moderator Graphite Structure Steel Buildings Pre-fab + concrete structures Reactor Characteristics Power ~15 Mwe/45 MWth Pressure 6 MPa Coolant T. 300-660°C Fuel mass <1 ton Balance of Plant IHX Printed-Circuit Heat Exchanger Secondary Medium Molten Salt (solar salt) Electricity Production Steam generator and turbines Efficiency 35-36% Attributes Passive safety, energy storage, road transportable components nanonuclearenergy.com KRONOS Differentiated High -Temp Gas Cooled Reactor Utilizing TRISO Fuel 13 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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nanonuclearenergy.com “Standard Design” Lower Capacity Higher Capacity Medium Capacity • KRONOS’ standard design and modularity provides versatility in deployment and ability to serve various industries and projects of different scales • Option 1: Standard design can be set to operate at almost any power below 20 MWe for one local unit for specialty needs • Option 2: Multiple units can be distributed to deliver power where needed • Option 3: Several units can be modularly deployed to serve projects up to 1GWe+ • KRONOS MMR able to scale up cost effectively over time to meet staged expansions of larger projects Simple/Flexible Design and Modularity Enable Deployment Versatility 14 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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Reactor Safety Features Enable Favorable Footprint & Ability to Co locate Use or disclosure of data contained on this sheet is subject to the restriction on the title page of this proposal. • Reactor safety features support a favorable footprint with no emergency planning zone needed, allowing the ability to co-locate at site, providing the option for off-grid power • Illustration depicts a hypothetical radioactive dose dispersion for a 840 MWe plant, under Design Based Accident conditions • Emergency Planning Zone (<1 mSv) well within the nuclear site boundary – showing meaningful radiation exposure not extending far beyond reactor building Reactor Negative Reactivity Feedback Passive Heat Removal Passive Shutdown Safety Attributes Fuel Safety Features KRONOS Yes Yes Yes Inert coolant, high- temp materials TRISO nanonuclearenergy.com Reactor Safety Features Enable Favorable Footprint & Ability to Co -locate 15 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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nanonuclearenergy.com KRONOS Can Provide Constant Baseload Power & Compelling Economics 16 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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Use or disclosure of data contained on this sheet is subject to the restriction on the title page of this proposal. • Recently established Oak Brook, IL facility will serve as a base for collaboration with the U of I on development and regulatory licensing • Hired >20 engineers & expected to initially support up to 60 engineers, researchers and support staff • Illinois’ established infrastructure and supportive political and social environments ideal for advancing next-generation reactor technologies • Anticipated partnerships with Hatch and PCL enhance project-delivery capabilities and execution readiness as it advances toward commercialization • Supply Chain a key area of focus and another important area of progress • Discussions with potential suppliers advancing in areas like TRISO fuel, reactor vessel, graphite, & other long-lead components nanonuclearenergy.com IL Facility & Growing Number of Strategic Partners Represent Key Areas of Progress 17 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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University of Illinois Leadership Remarks Rashid Bashir, Dean, The Grainger College of Engineering, University of Illinois 18 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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University of Illinois Leadership Remarks Caleb Brooks, Professor and Donald Biggar Willet Faculty Scholar, University of Illinois 19 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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Hatch – A Leading EPCM Firm Serving the Nuclear Industry Paulo Mesiti, Director, Nuclear Projects, Hatch 20 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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PCL - A Prominent Construction Firm With Deep Expertise in Advanced Energy Infrastructure Peter Tawfik, Director, Nuclear Operations, PCL Construction 21 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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ABOUT PCL 119 Year Old Company 100% Employee Owned 32+ Offices Across North America $12B+ In Annual Volume Nuclear Certified Constructor and Fabricator 22 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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BUILDING A BETTER FUTURE, TOGETHER LG&E CANE RUN 7-NGCC COMBINED CYCLE FABRICATION & MODULE FACILITIES OG&E MUSTANG SIMPLE CYCLEKEARL OIL SANDS PROJECT (EXXON) ABOUT PCL 23
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Advanced Nuclear Solutions Needed To Address Growing Data Center Power Needs Matthew O’Hare, CDCS, Managing Director, Power Construction & VP, AFCOM Chicago 24 nanonuclearenergy.com
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Source: Deloitte Research Center for Energy and Industrials’ analysis of data taken from DC Byte, the Center for Strategic and International Studies, Wells Fargo, Global Efficiency Institute, and Lawrence Berkeley National Laboratory. nanonuclearenergy.com US Data Center Power Capacity Expected to 5x by 2035 Note: “E” refers to estimated data center power capacity. 2024 33 GW 2025E 41 GW 2030E 120 GW 2035E 176 GW 25 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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Why Advanced Nuclear for Data Centers? Resilient Baseload Power nanonuclearenergy.com 26 Reduced Grid Dependency Lower Transmission Costs Scalable Deployment © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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Exploring KRONOS as a Scalable Solution for BaRupOn’s Energy Future Derek Matthews, CSO & Electrical Architect, BaRupOn 27 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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KRONOS MMR Applicability for Military Applications Vice Admiral Joe Leidig, Jr., U.S. Navy (Ret.), NANO Nuclear Executive Advisory Board Member 28 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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nanonuclearenergy.com KRONOS MMR Ideal for DoD Requirements Safety Pillars Security Pillars Operational Fit for DoD Mission Readiness 29 © 2025 NANO Nuclear Energy, Inc. All rights reserved.
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KRONOS MMR: The Nuclear Backbone For Next Generation Off - Grid & Microgrid Infrastructure General Wesley K. Clark U.S. Army (Ret.), NANO Nuclear Energy Executive Advisory Board Member 30 © 2025 NANO Nuclear Energy, Inc. All rights reserved. nanonuclearenergy.com
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© 2025 NANO Nuclear Energy, Inc. All rights reserved. THANK YOU! For Further Information, Please Contact: ir@nanonuclearenergy.com 31 nanonuclearenergy.com