Holtec International

Holtec confidentially files for a U.S. initial public offering. Reporting indicates the privately held company is seeking a valuation above $10 billion and plans to float a minority stake to fund nuclear-plant restarts and global SMR-300 deployment. The confidential filing was superseded on July 10, 2026 when Holtec Nuclear Corporation publicly filed a Form S-1 for a Nasdaq/Nasdaq Texas listing under ticker HNUC (see below); as of an August 21, 2026 S-1/A amendment the offering remained unpriced with shares and price range still to be set.

Building on a March 2025 U.S. DOE 10CFR810 authorization that lets it share SMR-300 technology with Tata Consulting Engineers, Larsen & Toubro, and its Holtec Asia subsidiary, Holtec detailed plans in February 2026 to stand up a dedicated SMR manufacturing hub in Gujarat - expanding its existing Dahej facility - to build up to 200 SMR-300 units for the Indian market, aiming to serve roughly one-third of India's ~600 administrative districts. Holtec said it would soon open discussions with India's Atomic Energy Regulatory Board (AERB) to secure design approval for the 300 MWe reactor.

Holtec announces that SMR-300 completed Step 2 of the UK Generic Design Assessment while the Pioneer 1 & 2 construction permit application remains under NRC review in the U.S.

Holtec completes passivation of the Palisades primary system - bringing the reactor coolant system back to operating temperature and pressure for the first time since the plant's 2022 shutdown - alongside inspection of 300+ pipes and welds and restoration of the main turbine generator, leaving fuel loading and grid reconnection as the final restart steps.

On May 19, 2026, at the Nuclear Energy Innovation Summit for Africa, Holtec International (via Holtec Europe director Rafael Marin) and the Rwanda Atomic Energy Board (CEO Dr. Fidele Ndahayo) sign a Comprehensive Development Agreement to advance deployment of the SMR-300 in Rwanda, targeting up to roughly 5 GW of potential capacity and covering site assessments, feasibility studies, and data collection - Holtec's first announced sub-Saharan African market and a sixth international SMR-300 target alongside the UK, India, and the U.S. sites.

A newly formed joint venture between Blue Castle Holdings and Fulcrum Point Holdings selects Holtec's SMR-300 to revive the long-dormant Blue Castle nuclear site in Green River, Utah, swapping out the project's legacy reactor design after 19 years of environmental, seismic, and groundwater groundwork. The plan calls for two to four SMR-300 pressurized-water reactors producing a combined 600 to 1,200 MW, with the design's air-cooling well suited to the arid Emery County site; the revival falls under Utah's 'Operation Gigawatt' clean-energy initiative.

On June 16, 2026 the U.S. Nuclear Regulatory Commission announces it will prepare an environmental impact statement for Holtec's application to build two SMR-300 reactors - Pioneer 1 & 2 - at the Palisades site in Michigan, formally launching the environmental review portion of the construction-permit process for the first-of-a-kind U.S. SMR-300 deployment.

On June 23, 2026 Holtec and EDF submit a joint proposal to the UK Government to deploy up to four SMR-300 reactors at the former Cottam coal power station in Nottinghamshire - roughly 1.3 GW of capacity - and sign Heads of Terms to form a joint venture to advance the project. It builds on Holtec's UK Generic Design Assessment for the SMR-300 and marks the company's first concrete UK deployment plan, a second site after the twin Pioneer units in Michigan.

On July 2, 2026 Holtec announced the Palisades restart had reached a watershed moment as the last of the plant's major projects were closed out and the site transitioned from large-scale construction to the routine maintenance, testing, inspection, and operational-readiness work required before startup. Final accomplishments in this project phase included placing the turbine-generator on turning gear after extensive refurbishment and installing and testing a new fuel-handling machine to complete the upgraded fuel-handling system; more than 5,000 individual work activities remain before the 800 MWe unit - the first-ever U.S. plant to reopen after entering decommissioning - can restart.

On July 3, 2026, the U.S. District Court for the Western District of Michigan dismissed a lawsuit brought in November 2025 by three anti-nuclear groups - Beyond Nuclear, Don't Waste Michigan, and Michigan Safe Energy Future - that sought to halt the Palisades restart. The court found it lacked jurisdiction because the Hobbs Act vests the U.S. Courts of Appeals with exclusive authority to review final NRC licensing orders, removing a legal overhang from the restart effort.

On July 10, 2026, Holtec Nuclear Corporation publicly filed a Form S-1 registration statement with the SEC for a proposed IPO of Class A common stock, intending to list on Nasdaq and Nasdaq Texas under the symbol HNUC - an upgrade from its February 2026 confidential filing. J.P. Morgan, Guggenheim Securities, Goldman Sachs, Citigroup, and BofA Securities are joint lead book-runners. The S-1 disclosed $989M of revenue for the 12 months ended March 31, 2026 and $983.6M of 2025 capital expenditures (largely Palisades restart and SMR-300 development); Renaissance Capital estimated the offering could raise about $2 billion, with the share count and price range still to be set.

On July 20, 2026, Holtec announces Palisades' post-restart safety leadership team: Fadi Diya, formerly Senior Vice President and Chief Nuclear Officer at Ameren Missouri (Callaway Energy Center) with roughly four decades in the nuclear industry, becomes Palisades' Chief Nuclear Officer effective July 27, 2026, and the plant's Nuclear Safety Review Board is set to convene starting August 3, 2026 - staffing milestones that follow the early-July 'watershed moment' close-out of major restart construction work.

On July 30, 2026 the NRC approved Holtec's License Termination Plan for the retired Oyster Creek Generating Station in Lacey Township, New Jersey - the final regulatory milestone in decommissioning the site, which was more than 50% complete at approval and which Holtec's plan targets finishing by 2029. Holtec plans to build four SMR-300 small modular reactors at Oyster Creek with a combined capacity of about 1.36 GW, targeting commercial operation in 2036 and projecting roughly 4,000 construction jobs and 400+ permanent positions, adding a third U.S. SMR-300 site alongside Palisades and Green River, Utah.

On August 4, 2026 Holtec, Entergy, and Hyundai Engineering & Construction signed a non-binding memorandum of agreement to jointly evaluate potential dual-unit SMR-300 projects across Entergy's Gulf South service territory - Alabama, Florida, Louisiana, Mississippi, and Texas - to serve large industrial, manufacturing, and AI-data-center load growth. The framework will assess customer demand, candidate sites, and commercial structures, extending the Holtec-Hyundai SMR-300 delivery partnership already underway at Palisades to a fourth potential U.S. region alongside Palisades, Green River, and Oyster Creek.

On August 25, 2026 the NRC issues an environmental assessment and finding of no significant impact granting Palisades SMR, LLC an exemption to begin support-of-excavation (SOE) wall construction for the Pioneer 1 & 2 SMR-300 site before a Limited Work Authorization is issued, finding no significant environmental impact from the early work. The NRC states it expects to publish the draft environmental impact statement for Pioneer 1 & 2 for public comment in fall 2026, ahead of Holtec's requested Part 1 review completion by December 31, 2026.

On August 30, 2026, Holtec begins loading nuclear fuel into the Palisades reactor vessel - 204 fuel assemblies, a mix of new fuel and partially used fuel from the plant's pre-2022 operating history - marking the most visible physical step yet toward making Palisades the first U.S. nuclear plant to return to service after entering decommissioning. Holtec says extensive tests and NRC-coordinated inspections remain before startup, and has not given a specific restart date; separately, in late August 2026 the anti-restart environmental coalition (Beyond Nuclear, Don't Waste Michigan, and allies) appealed the July 3, 2026 district-court dismissal of their lawsuit to two federal circuit courts of appeals.

Holtec announces HI-CLOUD, an initiative to convert decommissioned nuclear plant sites into utility-ready data center campuses, anchored by the former Indian Point Energy Center in New York with an initial 200 MW target and infrastructure capable of scaling toward up to 2,000 MW, paired with Holtec's Green Boiler thermal-storage and HI-THERM concentrated-solar-plus-photovoltaic technologies.

After NRC approval in July, Palisades officially transitions from decommissioning back to operations status on August 25, 2025, authorizing fuel receipt and restart preparations.

Holtec's dual-unit Pioneer 1 & 2 project at Palisades wins a $400M DOE First Mover award to support first-of-a-kind SMR-300 deployment in the U.S.

Receives a $1.52B conditional loan guarantee from the DOE to support the restart of the Palisades plant.

Acquires the Palisades Nuclear Generating Station in Michigan with plans to restart it - the first attempted nuclear restart in U.S. history.

Formally launches development of the SMR-160, Holtec's initial light-water small modular reactor design.

Expands into nuclear plant decommissioning services, eventually acquiring multiple retired nuclear sites.

HI-STORM dry cask storage system enters widespread commercial deployment, becoming the industry standard for spent fuel storage.

Kris Singh founds Holtec International to provide nuclear fuel storage and handling solutions.