Our first three achievements as part of the @departmentofenergy.bsky.social (DOE)’s Milestone-Based Fusion Development Program centered on our SPARC fusion demonstration machine. Now we’ve attained the next two DOE milestones — this time recognizing SPARC’s successor, ARC. 1/6 #FusionEnergy #Energy

If you want to literally build the future, we're holding a hiring day on Saturday, August 15 for production technicians who can help our work in fusion energy innovation. It’ll be at CFS headquarters in Devens, Massachusetts. 1/3

Today, CFS announced another major advance in our fusion energy push: we raised an additional $1 billion in funding. This is the largest investment round in commercial fusion worldwide since our $1.8 billion funding round in 2021, bringing our total capital raised to $4 billion. 1/4 #FusionEnergy

“It’s been one of the largest private backings of any energy company. It really is an enabler of our ability to go fast. In many ways we look like a SpaceX-type structure — we’re integrated, do a lot of work ourselves, with iteration very quickly and in parallel..." 1/3

CSIS Economic Security and Technology Department@est.csis.org · 2w ago

The $3 Billion Bet on Fusion Bob Mumgaard says @cfs.energy has raised about $3 billion from long-term investors who see fusion's enormous market potential. The demand is there—the challenge is advancing the technology. Watch: tinyurl.com/ykcx92ty

🔴 Live now! Betting on America "Is the United States Winning the Fusion Race?" Featuring Bob Mumgaard, Co-Founder and CEO of @cfs.energy @navingirishankar.bsky.social asks whether fusion can usher in virtually limitless clean energy—and whether the US will lead the way.

Is the United States Winning the Fusion Race? Featuring Bob Mumgaard, Co-Founder and CEO of Commonwealth Fusion Systems | Betting on America | CSIS Events

Bob Mumgaard, co-founder and CEO of Commonwealth Fusion Systems, joins Navin Girishankar to discuss whether fusion can usher in an era of virtually limitless clean energy—and whether the United…

tinyurl.com

South Korea as future key fusion supply chain country: www.mk.co.kr/en/it/12099437 interview with CEO of @cfs.energy #fusionenergy

"South Korea will be a 'top five' country in the global fusion supply chain." Bob Mumgard, CEO of Co.. - MK

"South Korea will be a 'top five' country in the global fusion supply chain." Bob Mumgard, CEO of Commonwealth Fusion Systems (CFS), the world's largest private fusion company, pointed to South Korea ...

mk.co.kr

In the last year, investors brought $4.5 billion of new funding to fusion companies, dwarfing governmental fusion budgets, according to the newest @fusionindustry.bsky.social yearly report on the industry. 1/4

It's been a busy six months at Commonwealth Fusion Systems (CFS). In the newest of our twice-yearly video updates, CEO Bob Mumgaard discusses how dry dress rehearsal is occurring in parallel with #SPARC assembly, and shares other recent progress: 1/3

In its 250 years, America has created some of the most influential innovations in human history. Now, almost 60 years after putting a man on the moon, we’re on the cusp of bringing a star to Earth. 1/2 #America250 #IndependenceDay #AmericanInnovation

The @ukaeaofficial.bsky.social has established a program to test technology that’s crucial for producing fusion fuel — and CFS will be the first organization to take advantage of it. Today, we announced this new collaboration with the UKAEA’s Lithium Breeding Tritium Innovation (LIBRTI) program. 1/4

We’re live with our second AMA (as me anything) on Reddit — this time a Q&A with four physicists who co-authored the five peer-reviewed papers that lay the physics foundation for our ARC fusion power plant. 🧵1/3 www.reddit.com/r/fusion/com... #FusionEnergy #Physics #AMA

"I don’t believe fusion would happen without welders. Welding is basically materials science practiced in reality." – Lex Palmer, CFS Welding Engineering Manager 1/5

It’s time for another Reddit Ask Me Anything (AMA) — only this time it’s more of an Ask Us Anything. From 9:30–11:30 a.m. ET on June 30, four of our physicists will answer your questions on our five new peer-reviewed papers about the physics basis of our ARC fusion power plant. 1/5 #FusionEnergy

Today - live from the first Fusion Supply Chain Trade Show - we're launching the 2026 Fusion Industry Supply Chain Report. Read the full report here: fusionindustryassociation.org/news/from-th... Press Release: fusionindustryassociation.org/fia-launches...

So how do you confine a superhot, 100M°C fusion plasma? With superstrong magnets, of course. 🧲 1/3 #SPARC

Installing SPARC's third superstrong TF magnet #SPARC #Magnets #FusionEnergy

YouTube video by Commonwealth Fusion Systems

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We’re glad to see the @cleanaircatf.bsky.social launch the Materials Database for Fusion (MatDB4Fusion) effort with a strong public-private international steering committee. 🧵 1/3 Announcement: www.catf.us/2026/06/catf... #FusionEnergy

CATF announces Steering Committee to guide global fusion materials database MatDB4Fusion

Clean Air Task Force today announced the formation of the Steering Committee for the International Working Group on Materials Database for Fusion.

catf.us

"One of the nice things about this technology is that when you look at the fundamentals behind it, there's not a lot of barriers to scaling..." 1/3 #FusionEnergy #Energy

“Support from the government would be essential … otherwise we fall into the trap we’ve fallen into many times before, where the U.S. seeds innovation with an 's' and then cedes it with a 'c'.” 1/3

Our eyes, ears, and fingertips are good for figuring out a lot of what’s going on around us. But to understand the inner workings of a fusion energy machine, you need more than human senses. That’s where diagnostic equipment comes into play. Here’s how we use diagnostics at CFS. 1/6

On Thursday, we published five peer-reviewed papers that set the plasma physics foundation for our ARC fusion power plant, tackling the challenges and showing no showstoppers. 1/2

Today, we laid the physics foundation for our ARC fusion power plant. ⚛️ With 5 deeply researched papers — validated by independent peer review and published in the Journal of Plasma Physics from @universitypress.cambridge.org — we’ve shown we've nailed the science of producing fusion power. 1/7

Today we announced a new strategic agreement with the Singapore-based @astarsg.bsky.social. This 5-year collaboration is designed to develop technologies for commercial fusion power plants. 1/7 #FusionEnergy

100 million degrees Celsius. That how hot our plasma will be after our SPARC fusion demonstration machine begins operations in 2027. With both halves of our vacuum vessel now inside tokamak hall, we’ve begun readying them to host the most intense conditions in the solar system. 🧵 1/3 #FusionEnergy

100 million degrees: Step inside the heart of SPARC

YouTube video by Commonwealth Fusion Systems

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From @bengeman.bsky.social: Commonwealth Fusion Systems announces new step toward making U.S. fusion real www.axios.com/2026/04/28/c...

Commonwealth announces new step toward making U.S. fusion real

It has formally filed a request with grid operator PJM to connect its planned power plant in Virginia.

axios.com

“Over and over we meet long-term milestones, like securing our supply of high-temperature superconducting (HTS) tape, delivering our first prototype magnet, building a factory, and taking delivery of long-lead equipment,” said CFS Chief Commercial Officer Rick Needham... 1/4

Today we announced a new major step in our commercialization effort: We’ve applied to plug our first ARC fusion power plant into the grid. This crucial move shows that CFS is successfully navigating the complexities of delivering power, not just generating it. 1/5 #PowerMoves

“Fusion uses tritium, but it also makes it as it goes. It’s sort of like a sourdough starter. You use it and then regenerate it— that’s been shown to work in various labs. So to do it, you need a little bit of starter. Right now, that starter comes mostly from fission power plants.” 1/5

We just wrapped up our second Boundary Collaborators Workshop — a conference that lets Commonwealth Fusion Systems (CFS) experts meet with peers from universities, national labs, and companies whom we invite over to dig into the physics of our fusion machines. 🧵 1/6 #FusionEnergy #physics 🔌💡

"Unlocking fusion energy is not simply a technological milestone, but it is the foundation of energy security, economic competitiveness, and geopolitical power in the twenty-first century,” concludes the @csis.org. 1/3 #FusionEnergy

It’s time for a new inside look at the #SPARC facility, where we're about 75% done building our machine to demonstrate fusion energy’s commercial viability. 1/4