DeepFission

It's an exciting time for @DeepFission. ⚛️ What if the biggest barrier to expanding #nuclear energy isn't the reactor, but the way we deploy it? In this overview video, our CEO and co-founder Liz Muller shares about our deployment-first approach and progress toward commercialization, leveraging proven technology in a new way to help meet urgent demand for reliable, affordable power. Watch ⬇️

Reliable energy helps power more than the grid. It supports jobs, strengthens communities, and creates opportunities for future generations. That's the future @DeepFission is working toward, starting in Parsons, Kansas. ⚛️ Learn more: deepfission.com $FISN

Our team @DeepFission is growing as we work to advance an innovative approach to deploy #nuclear energy from a mile underground. Visit our careers page to explore current opportunities and submit your application ➡️ deepfission.com/careers #Hiring #Careers #NuclearEnergy #DeepFission #Engineering

Yesterday, members of the @DeepFission $FISN team had the honor of ringing the @NasdaqExchange Closing Bell. While we were proud to celebrate this milestone together, our focus remains the same ➡️ advancing a practical path toward commercial deployment to help deliver reliable, affordable #NuclearEnergy. Thank you to our employees, partners, supporters, and shareholders for helping make this progress possible. Closing Bell replay: nasdaq.com/events/deep-fi… Learn more: deepfission.com/technology #Nuclear #FISN #NasdaqListed #Nasdaq #TimesSquare

@sofiepoppy858 @NasdaqExchange Hey @sofiepoppy858 - you can find answers to several of your questions here ➡️ deepfission.com/faq

@NasdaqExchange @DeepFission so how deep does the borehole actually go before you hit usable rock for the casing

.@DeepFission is deploying small modular pressurized water reactors directly into boreholes underground, combining proven nuclear technology with a breakthrough deployment model that simplifies construction, maximizes safety, and scales fast. Honored to celebrate you!

What a day. 👏 It was an honor to ring the @NasdaqExchange Closing Bell and celebrate this exciting chapter for @DeepFission $FISN alongside our team, partners, and supporters. We're grateful to everyone who has helped us reach this point, and we're looking forward to the work ahead as we continue advancing our path toward commercial deployment. Learn more: deepfission.com/pr-media-kit/p… #DeepFission #FISN @Nasdaq #NuclearEnergy

@NasdaqExchange @Nasdaq Thank you! $FISN

Welcoming @DeepFission to the @Nasdaq Closing Bell in celebration of their recent listing. x.com/i/broadcasts/1…

We are ringing the @NasdaqExchange Closing Bell at 4 p.m. ET today, in celebration of the arrival of our @DeepFission Gravity Nuclear Reactor™ prototype canister to our Parsons, Kansas, site and our recent listing on the @Nasdaq Stock Market - $FISN. 🎉 Now onsite, our prototype canister will be prepared for additional testing as our team advances permitting and preparations for our non-nuclear demonstration borehole. In parallel, we're continuing the development of our full-scale #nuclear demonstration borehole and other key systems that support our commercial deployment approach. Tune in to the ringing ➡️nasdaq.com/marketsite/bel… Learn more ➡️ deepfission.com/pr-media-kit/p… #DeepFission #FISN #Nasdaq #Nuclear #AdvancedNuclear

This #IndependenceDay, we're celebrating America’s 250th birthday and the innovation that has helped define our country from the beginning. From the engineers, scientists, builders, and communities working to solve complex challenges, progress has always been driven by people willing to think differently and put ideas into action. That spirit continues to inspire our work @DeepFission as we explore an innovative approach to expand access to reliable, affordable energy through proven #nuclear technology deployed one mile underground. Happy #4thofJuly from the Deep Fission team! 🇺🇸 Learn more: deepfission.com/technology #NuclearEnergy #AmericanInnovation $FISN

What if the future of #NuclearEnergy isn’t about reinventing the reactor, but rethinking where and how we deploy it? Our Gravity Nuclear Reactor™ is designed to integrate proven technologies to reduce cost, complexity and surface footprint. ⚛️ deepfission.com $FISN

Meet Steve Spears. 👋 He’s a Senior #Nuclear Operations Engineer @DeepFission helping shape our operations, maintenance, and training programs and bringing decades of experience from both the U.S. Navy and commercial nuclear power to support safe, reliable plant operations. "What inspires me most about the work we're doing at Deep Fission is the opportunity to help apply proven nuclear technology in a simpler and more deployable way. It's exciting to be part of a team that is focused on expanding access to reliable #energy while building on decades of industry experience and operational knowledge." 𝗪𝗵𝗮𝘁 𝗦𝘁𝗲𝘃𝗲 𝘄𝗶𝘀𝗵𝗲𝘀 𝗺𝗼𝗿𝗲 𝗽𝗲𝗼𝗽𝗹𝗲 𝘂𝗻𝗱𝗲𝗿𝘀𝘁𝗼𝗼𝗱 𝗮𝗯𝗼𝘂𝘁 𝗻𝘂𝗰𝗹𝗲𝗮𝗿 ⚛️ "I wish more people understood that #NuclearEnergy is one of the safest and most reliable sources of low-carbon electricity available today. Decades of operational experience have demonstrated its ability to provide dependable power while maintaining a strong commitment to safety. Deep Fission is building on that foundation by exploring new ways to make nuclear power more accessible, scalable, and affordable. By combining established nuclear technology with innovative deployment approaches, we're working to expand access to reliable energy while maintaining the high standards that have defined the industry for decades. After more than 20 years in the U.S. Navy and over 15 years in commercial nuclear power, I joined Deep Fission because of the people and the vision. It's a unique opportunity to work with a talented team focused on responsible deployment, operational simplicity, and the future of reliable nuclear infrastructure." Learn more: deepfission.com/technology

Steam has powered electricity generation for more than a century. @DeepFission is aiming to apply that same proven principle in a unique environment ➡️ one mile underground. deepfission.com/technology $FISN #NuclearEnergy

The @DeepFission team has successfully fabricated and tested our first prototype reactor canister, achieving an important milestone on our path toward deployment. The testing confirmed that the canister meets key industry requirements for structural integrity and leak tightness. This canister will support testing of the integrated assembly, installation, and retrieval of a full-scale #nuclear reactor system within a borehole. As we continue advancing these demonstrations, we're building the capabilities needed to validate our deployment approach to deliver reliable, affordable energy from one mile underground. Learn more: deepfission.com/technology #NuclearEnergy #AdvancedNuclear #Energy (Nasdaq: $FISN)

We are grateful to @INL for hosting us yesterday, and providing the opportunity to connect with @ENERGY's @SecretaryWright, and our fellow developers in the Reactor Pilot Program. It’s an exciting time for #NuclearEnergy, and @DeepFission is proud to be contributing to U.S. #nuclear innovation as we advance our path toward commercialization. Learn more: deepfission.com/about-us @eamuller @GovNuclear #AmericanInnovation

“These are all companies that they have different ideas, but they all have an intelligence, drive and a boldness about them…..My bet is 100% success.👏 Everyone that got chosen and is in this program… I can see it the eyes, and see it in the hearts…we are going to see success across the board.” -@SecretaryWright We are honored to be among the 10 companies in the @ENERGY's Reactor Pilot Program, and feel energized from being personally recognized by Secretary Chris Wright today. Our path to commercialization is feeling more important than ever. Check it out: youtube.com/live/P1rIWi1sl… (Timestamp: ~47:00) #DeepFission #Nuclear #NuclearEnergy #EnergyDominance #EnergyInnovation $FISN @GovNuclear

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Today, @DeepFission is proud to be represented at @INL’s Golden Era of Nuclear Power event by our Co-Founder and CEO, Liz Muller, alongside members of the Deep Fission team. This event brings together leaders from across the nuclear energy ecosystem, including @SecretaryWright, to discuss how advanced reactors will help meet the world's growing demand for reliable, low-carbon energy. Held just ahead of the United States' 250th anniversary, the event highlights the nation's accelerating #nuclear renaissance and the technologies shaping America's energy future. We're excited to be part of this important conversation and to help shape the future of #NuclearEnergy. Read more: deepfission.com/news-media/pre… @ENERGY @GovNuclear

.@DeepFission brings together engineers, scientists, regulatory experts, drilling specialists and infrastructure operators working toward one goal ➡️ accelerating the commercialization of reliable #NuclearEnergy. Our approach aims to integrate established reactor technology with existing capabilities from the oil, gas, and geothermal industries to support efficient, scalable deployment. We’re building thoughtfully, collaboratively, and with long-term infrastructure in mind. Learn more: deepfission.com/about-us $FISN #nuclear

What you see above is a slice from a rendering of our proposed reactor design, underground and enclosed within multiple engineered barriers, including sealed steel casings and concrete, which aim to prevent any interaction between the reactor and surrounding groundwater. Learn more: deepfission.com/technology

Zoomed in. Way in. 👀 Think you know what you're looking at? Drop your best guess in the comments below. ⬇️ (We'll reveal the answer tomorrow.)