The global battery factory boom was supposed to follow a simple script: demand rises, factories get built, supply catches up. In early 2026, the reality is far messier. A single week in March set the story's terms, but April has added several new plot twists: Stellantis is exiting its stake in NextStar, Samsung SDI just extended a $1.05 billion loan to keep StarPlus Energy alive, and the UK handed Tata's Agratas gigafactory £380 million in government funding. The shakeout is deepening. In Windsor, Ontario, the Stellantis-LG Energy Solution joint venture NextStar Energy hit one million battery cells barely four months after launching production. Across the Atlantic, Automotive Cells Company (ACC) confirmed it halted two planned gigafactories in Italy and Germany. And now, in early April 2026, reports indicate Stellantis is moving to exit its NextStar stake entirely, leaving LG Energy Solution as sole owner. These aren't isolated events. They reflect a structural divide in how different regions and companies are approaching the enormous capital bets required to electrify transportation — and the fault lines are getting sharper. AI-generated image Modern battery gigafactories require billions in capital and years of construction before producing a single cell June 2026 Update This article has been refreshed with the latest ownership and infrastructure signals: LG Energy Solution's full control of NextStar is now the baseline, StarPlus remains funded while ESS and LFP plans carry more weight, Agratas has both UK grant support and local road approval in Somerset, and the Northvolt story has shifted toward Lyten's restart test rather than a clean European manufacturing recovery. June 2026 status check The Shakeout Is Now About Who Can Use Finished Buildings The latest factory news points in a narrower direction than the 2021 boom. Capital is still available for battery plants, but it is being pulled toward facilities that already have power, permits, customers, or a second use case. NextStar has a running Windsor plant, StarPlus has a Kokomo footprint that can lean toward ESS, Agratas has government support plus local road approvals, and Lyten has Northvolt assets that must be restarted line by line. 45 GWh NextStar target capacity in Windsor at full ramp $1.05B Samsung SDI loan exposure tied to StarPlus Energy £380M UK funding package for Tata Agratas in Somerset H2 2026 Lyten's stated target for commercial cell deliveries from restarted Swedish assets NextStar is the cleanest example. The Windsor site is no longer just a Stellantis vertical-integration story. LG Energy Solution's full ownership makes it a supplier-led factory with an anchor customer and a clearer path to sell across EV and storage markets. That lowers governance friction, but it also shows how automakers are stepping back from balance-sheet-heavy cell manufacturing when demand is uneven. StarPlus is less settled. Samsung SDI's loan extension keeps the Kokomo project alive while the facility weighs EV, ESS, and LFP production priorities. The practical readout is that Indiana battery capacity may survive because storage demand is stronger and more flexible than the original EV-only ramp assumed. Agratas is the opposite case: it is still a construction and execution story, not a rescue story. The UK grant and Somerset road approval reduce site risk for the Bridgwater factory, which is meant to serve Jaguar Land Rover and other Tata demand. That does not remove market risk, but it gives Britain one of the few large European battery projects with fresh public backing and visible civil works momentum. Lyten's Northvolt restart is the hardest test. Buying the assets was only the first step. The real question is whether a lithium-sulfur startup can run inherited lithium-ion plants, keep customers engaged, and turn idle European capacity into deliveries before the next funding window closes. Sources: NextStar Energy news archive , NextStar ownership announcement , BBC on Somerset ring road approval , DOE StarPlus loan office note , and Lyten Sweden acquisition update . Canada's Big Moment Turned Into Stellantis's Exit NextStar Energy's 4.2-million-square-foot plant in Windsor, Ontario, reached a symbolic milestone in early March 2026: one million battery cells produced since commercial operations began in November 2025. The facility, backed by CA$5 billion in investment from Stellantis, LG Energy Solution, and Canadian government subsidies, employs 1,300 workers and holds ISO certification for both EV and energy storage cell production. The plant is Canada's first commercial-scale EV battery factory. It produces pouch-format cells using LG Energy Solution's chemistry and manufacturing know-how, feeding Stellantis assembly plants across North America. When fully ramped, the facility targets roughly 45 GWh of annual output, enough to supply batteries for approximately 600,000 electric vehicles per year. AI-generated image NextStar Energy's Windsor, Ontario facility is Canada's first commercial-scale EV battery plant The speed of the ramp matters. One million cells in roughly four months suggests NextStar's production lines are stabilizing faster than many skeptics predicted. But the factory's ownership picture shifted dramatically in April 2026, when reports emerged that Stellantis is withdrawing from the joint venture and transferring its stake to LG Energy Solution. LG would then own the facility outright. The logic is Stellantis's: after recording $26.5 billion in EV-related writedowns in its most recent financial disclosures, the automaker is shedding capital-intensive battery investments and refocusing on vehicle assembly and software. For LG Energy Solution, taking sole control of a functioning Canadian factory with government backing is likely attractive. The facility's production targets, employees, and ISO certifications remain unchanged by the ownership shift — the cells still go into Stellantis vehicles under supply agreements. But it signals a clear pivot away from the vertically integrated model that dominated automaker battery strategy from 2020 to 2024. NextStar Energy: Updated Facts (April 2026) Ownership (as of April 2026): LG Energy Solution (sole owner, pending close) Location: Windsor, Ontario, Canada Investment: CA$5 billion Facility Size: 4.2 million sq ft Employees: 1,300 direct (target: 2,500) Production Start: November 2025 Milestone: 1 million cells (March 2026) Target Capacity: ~45 GWh/year at full ramp ACC Pulls the Plug on Italy and Germany While Canada's plant keeps running, Europe's battery manufacturing ambitions continue to erode. Automotive Cells Company, a joint venture between Stellantis, TotalEnergies, and Mercedes-Benz, confirmed in March 2026 that it has definitively halted planned 8 GWh gigafactories in both Italy and Germany. The company will instead focus its resources on expanding its existing French plant in Billy-Berclau/Douvrin, which is being scaled toward 28 GWh of capacity. ACC's retreat follows a string of setbacks. The company paused construction at the Italian and German sites in mid-2025, citing "market conditions" and the need to pivot from NMC chemistry to LFP cells, which Chinese manufacturers produce at dramatically lower cost. That pivot requires entirely different production equipment, effectively invalidating much of ACC's original investment in manufacturing tooling. The underlying problem is straightforward: European battery makers cannot compete on cost with Chinese producers. CATL, BYD, and a dozen second-tier Chinese manufacturers have spent over a decade optimizing LFP cell production. They benefit from lower labor costs, massive government subsidies, cheap electricity, and deeply integrated domestic supply chains for cathode and anode materials. A European startup trying to replicate that cost structure from scratch faces enormous headwinds. ACC's French facility remains operational but faces its own challenges. Output has been be