공시 • 2h
Deep Fission Announces Arrival Of Prototype Reactor Canister At Parsons Kansas Site Deep Fission, Inc. announced the arrival of its prototype reactor canister at its Parsons, Kansas site, marking a key milestone in the Company’s Proof-of-Concept Well program and its Gravity Nuclear Reactor™ development. The factory-built prototype canister completed fabrication, hydrostatic testing, and delivery to Kansas, representing tangible progress toward validating installation, infrastructure readiness, and operational sequencing for the Company’s first commercial demonstration well. Upcoming testing using this hardware will validate the approach and provide valuable learnings as key systems are assembled, installed and tested under non-nuclear conditions in a large diameter borehole. The Proof-of-Concept Well is Deep Fission’s nearly full-scale validation program, designed to demonstrate a larger-diameter borehole and end-to-end installation workflow using commercial-grade, non-nuclear components prior to fuel loading. The program is intended to validate each stage of underground deployment under real-world conditions while confirming engineering assumptions at scale and supporting the Company’s broader commercialization timeline. The reactor canister is a key component of Deep Fission’s Gravity Nuclear Reactor™ design, which places a small modular pressurized water reactor in a borehole approximately one mile underground. The Gravity Reactor™ is based on established pressurized water reactor technology adapted for subsurface deployment, using pressure from a mile-long water column atop and surrounding the reactor in the borehole, to support operating pressure and cooling. In this design, thermal energy is transferred through a closed-loop system from the reactor canister to a heat exchanger, then rises to the surface in a secondary closed-loop for conversion into electricity, like a geothermal system. Following arrival at the Parsons site, the non-nuclear prototype reactor canister will be prepared for testing as Deep Fission continues preparation for its large diameter drilling program. The Company is advancing permitting with the Kansas Department of Health and Environment (KDHE) for the non-nuclear borehole, which is expected to serve as the next major proof-of-concept milestone. The Company is also progressing development of its full-scale nuclear demonstration borehole and advancing design of its primary heat exchanger. These parallel efforts support a phased strategy to accelerate iterative validation of the most unique aspects of Deep Fission’s commercial deployment model. Deep Fission is participating in the U.S. Department of Energy’s Reactor Pilot Program. Authorized under Executive Order 14301, the program enables reactor testing and deployment in order to accelerate the path to commercialization of nuclear energy. 공시 • Jun 25
Deep Fission, Inc. Signs Letters of Intent for Up to 18.5 Gigawatts of Generation Capacity and Advances Gravity Nuclear Reactor Project Deep Fission, Inc. signed Letters of Intent (LOIs) with data centers, co-developers, industrial parks, and strategic partners representing up to 18.5 gigawatts (GW) of potential generation capacity. The Company is currently advancing its first reactor project at the Great Plains Industrial Park in Parsons, Kansas as part of the Department of Energy’s Reactor Pilot Program. It has completed drilling of its first data acquisition borehole to approximately 6,000 feet deep. Deep Fission’s next milestones will first demonstrate the ability to drill a commercial-scale borehole and then safely deploy a prototype reactor. These LOIs are non-binding and do not contain commitments to purchase electricity, finance projects, construct facilities, grant exclusivity, or deploy a specified number of reactors. Either party may terminate these arrangements without penalty. Deep Fission is developing technology that places a small modular pressurized water reactor in a borehole approximately one mile underground. The Company’s Gravity Nuclear Reactor approach combines established pressurized water reactor technology with a novel underground deployment model designed to simplify construction, enhance safety, and support scalable commercial deployment. Deep Fission is currently advancing the development of its first reactor project in Parsons, Kansas and was selected for the U.S. Department of Energy’s Reactor Pilot Program. 속보 • Jun 23
Deep Fission Raises $40 Million to Fund Pilot Small Modular Reactor Development Deep Fission closed a public offering of 2.5 million shares at $16.00 per share, raising $40 million in gross proceeds to fund R&D, engineering, licensing and the build-out of its first pilot small modular “Gravity Reactor.” Its stock is listed on the Nasdaq Global Market under ticker FISN from 18 June 2026.
The capital raise is intended to support development of underground small modular reactors that use subsurface conditions for containment and operation, with the company targeting carbon-free power primarily in the U.S. market.
Deep Fission shares currently trade at $14.56, with the stock down 9.0% year to date.
The key read-through is that Deep Fission now has additional funding to pursue its pilot reactor and licensing plans, but investors are still weighing execution, regulatory and technology risks against the company’s early-stage valuation. Board Change • Jun 20
High number of new and inexperienced directors There are 6 new directors who have joined the board in the last 3 years. The company's board is composed of: 6 new directors. 6 experienced directors. No highly experienced directors. Co-Founder, CEO, President & Chairman Liz Muller is the most experienced director on the board, commencing their role in 2024. The following issues are considered to be risks according to the Simply Wall St Risk Model: Lack of board continuity. Lack of experienced directors.