Participated · Seed · Aug 2026

Apollo Atomics focuses on shrinking and mass-manufacturing the steam generator—the largest component in many nuclear plants—by using a compact metal block with needle-thin channels to transfer heat more efficiently. Its design, based on MIT research, enabled the company to build a reactor it says is roughly 40-times smaller than ones using conventional steam generators and to assemble systems in a factory rather than on site. Apollo has built a 40-kilowatt demonstration reactor at MIT and plans to offer reactor sizes from about 10 megawatts-electric up to 300 megawatts. The company projects it can build a 300 MW plant in under 24 months and estimates the reactor will cost four to five times less to produce than existing designs. Apollo targets a levelized cost of electricity near 3 cents per kilowatt-hour and aims for commercial deployment in 2028. It participated in Y Combinator’s Spring 2026 batch.

Participated · Equity · Dec 2025

Blykalla is an advanced nuclear-technology company focused on the SEALER reactor, a compact, lead-cooled fast reactor intended to provide stable, emission-free baseload electricity. The company positions SEALER for both national grids and rapidly growing hyperscale data-center markets whose power needs are increasing with AI adoption. With its latest funding, Blykalla will scale verification and validation activities at the Advanced Reactor Testing Site in Oskarshamn, progress detailed design and construction of its first reactor unit, and accelerate commercial and regulatory work to secure a deployment site and permits. A newly signed Joint Technical Development Agreement with U.S. reactor developer Oklo enables the two firms to coordinate licensing, component procurement, fuel supply, and broader supply-chain efforts, aiming to shorten timelines and reduce risk. Strategically, Blykalla also taps expertise from industrial partners such as Uniper, KSB, and ABB. The company has now raised an additional $50 million, strengthening its balance sheet as it moves toward initial deployment; no revenue or customer metrics were disclosed in the articles.

Participated · Series A · Sep 2025

Nuclearn develops a domain-specific artificial intelligence platform designed for the highly regulated nuclear power sector. Trained on millions of industry documents and diagrams, the software understands nuclear terminology, operational context, regulatory obligations, and safety requirements, allowing it to automate tasks such as condition report analysis, outage planning, and regulatory paperwork. The system can be deployed on-premise, in hosted environments, or in secure government clouds, giving utilities flexibility without compromising security or compliance. Nuclearn’s solution is already in use at more than 65 reactors worldwide, helping plants mitigate looming workforce shortages as one-quarter of nuclear employees near retirement. By accelerating historically manual processes, the platform frees experts to focus on higher-value decision-making and preserves institutional knowledge. The company plans to use new capital to enhance its product, enter additional markets, and scale its engineering and nuclear operations teams amid growing global demand for carbon-free baseload power.

Participated · Series A · Sep 2025

Nuclearn develops AI models and software to automate repetitive tasks and generate routine documentation for nuclear reactor operators. Its models are trained on nuclear industry-specific terminology and the company can train custom models for utilities on request. The software runs in the cloud, and Nuclearn can also help reactors set up on-site hardware to satisfy security protocols. Reactor operators can set thresholds for automation and review and sign off on AI-generated outputs; the company positions the tools as a "junior employee." Founders Bradley Fox and Jerrold Vincent started the company while working at the Palo Verde Nuclear Generating Station. Nuclearn says its tools are being used in more than 65 nuclear reactors worldwide and it recently raised a $10.5 million Series A. Nuclearn.ai provides AI- and ML-based process automation solutions tailored to the nuclear and utility sectors, with products such as Nuclear AutoCAP Screener and Nuclearn Evaluator. The company is developing AtomAssist, its Nuclear Language Model (LLM), alongside other utility-focused product use cases. Co-founded by Jerrold Vincent and Bradley Fox, Nuclearn.ai emphasizes innovation, privacy, and security in its offerings. The company raised $2.5M in seed funding to support growth and product development. Planned use of proceeds includes hiring relationship-based sales teams targeting the North American nuclear power market and the broader utility market. The firm’s roadmap centers on commercializing LLM capabilities and expanding sales coverage in utility-focused segments.

Participated · Series B · Aug 2025

Aalo Atomics is a U.S. scaleup developing next-generation nuclear reactors. The company is described in the coverage as pursuing innovative engineering and an unusually fast execution pace within the nuclear sector. The fundraise drew institutional backers including Ontario Teachers and participation from retail-access fintech Akka. Public reporting about the company in this article did not include founding year, revenue, deployment timelines, or detailed technical specifics. Akka and its CEO emphasized the broader energy challenge and positioned Aalo as a rapid player addressing that market opportunity.