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Commonwealth Fusion Systems @cfs.energy · 3h

"SPARC was designed with the intent not to be connected to the grid but to have 13 of the 17 systems you need in a power plant to show the world that we have a near-scale fusion machine that can work as a power plant... 1/4

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Commonwealth Fusion Systems @cfs.energy · 01/10/2026

In a one-day sprint 10 years ago, researchers at @mit.edu helped chart the CFS path to commercializing fusion energy — even before CFS was actually founded. 1/5

The inside of MIT's Alcator C-Mod tokamak

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Commonwealth Fusion Systems @cfs.energy · 30/09/2026

2/4 Today CFS took an important step toward meeting that need, announcing an agreement to purchase more than 10,000 km (3 GA-m) of high-temperature superconducting (HTS) tape from Fujikura Ltd. It’s the largest single purchase order for HTS tape, a critical component of our breakthrough magnets.

CFS CEO and Co-founder Bob Mumgaard shaking hands with Naoki Okada, Director, President, and CEO of Fujikura Ltd

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Commonwealth Fusion Systems @cfs.energy · 29/09/2026

“Think about what [fusion] means in a technological race. Power is the thing that powers the next economy, right? All the geostrategic strife we have right now is about power in the form of natural resources... 1/5

CFS CEO and Co-founder Bob Mumgaard speaking at the Heatmap News House during Climate Week NYC 2026.

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Commonwealth Fusion Systems @cfs.energy · 25/09/2026

3/3 Our team in action, including CEO and Co-founder Bob Mumgaard with @axios.com, Chief Global Affairs Officer Jennifer Ganten with @cleanaircatf.bsky.social, Chief Engineer of ARC Conceptual Design Alex Creely with @xprize.org, and VP of Plasma Physics Phil Snyder with @columbiaseas.bsky.social

CFS CEO and Co-founder Bob Mumgaard with Axios

CFS Chief Global Affairs Officer Jennifer Ganten with Clean Air Task Force

CFS Chief Engineer of ARC Conceptual Design Alex Creely

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Commonwealth Fusion Systems @cfs.energy · 24/09/2026

Some big progress advancing fusion energy in the United States today: the introduction of the American Leadership in Fusion Act, a bill with bipartisan backing that would hasten the day that the country could benefit from this new source of energy. 1/5

Aerial view of Commonwealth Fusion Systems' SPARC facility in Devens, Massachusetts.

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Commonwealth Fusion Systems @cfs.energy · 23/09/2026

We’re glad to reveal that Commonwealth Fusion Systems has made it on to the 50 by 2050 list, a collection of companies tackling the physical world’s hardest challenges — areas like agriculture, transportation, industry, critical resources, computing, and our own business, power generation. 1/3

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Commonwealth Fusion Systems @cfs.energy · 21/09/2026

We're looking forward to being part of the conversation this week at #ClimateWeekNYC and introducing our clean energy technology to anyone who's not up to speed on fusion. 1/5

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Commonwealth Fusion Systems @cfs.energy · 02/09/2026

CFS is gearing up for SPARC’s dry dress rehearsal (DDR), firing up our tokamak’s support systems. In parallel with tokamak assembly, we're validating critical support systems like power and cooling under real operating conditions. 1/2

A CFS team member works inside the cryogenic plant inside Commonwealth Fusion Systems' SPARC fusion facility

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Commonwealth Fusion Systems @cfs.energy · 27/08/2026

Big, world-changing technologies don't happen in a flash. They're built on days, then months, and then years of steady progress toward a singular goal. When we turn on our #SPARC tokamak and generate net fusion energy, it may feel like an overnight success to those who haven't tracked us. 1/3

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Commonwealth Fusion Systems @cfs.energy · 25/08/2026

The future of fusion isn't built all at once. As #SPARC moves closer to operation, our team is commissioning the systems that make fusion possible — 1/4

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Commonwealth Fusion Systems @cfs.energy · 06/08/2026

What's different now about commercializing fusion energy compared to past efforts? Three things, CFS CEO and Co-founder Bob Mumgaard told Adele Peters of @fastcompany.com. 1/5

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Commonwealth Fusion Systems @cfs.energy · 05/08/2026

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

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Commonwealth Fusion Systems @cfs.energy · 03/08/2026

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

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Commonwealth Fusion Systems @cfs.energy · 30/07/2026

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

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Commonwealth Fusion Systems @cfs.energy · 13/07/2026

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

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Commonwealth Fusion Systems @cfs.energy · 08/07/2026

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

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Commonwealth Fusion Systems @cfs.energy · 02/07/2026

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

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Commonwealth Fusion Systems @cfs.energy · 25/06/2026

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

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Commonwealth Fusion Systems @cfs.energy · 10/06/2026

“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

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Commonwealth Fusion Systems @cfs.energy · 04/06/2026

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

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Commonwealth Fusion Systems @cfs.energy · 20/05/2026

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

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Commonwealth Fusion Systems @cfs.energy · 01/05/2026

“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

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Commonwealth Fusion Systems @cfs.energy · 28/04/2026

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

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Commonwealth Fusion Systems @cfs.energy · 24/04/2026

“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

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Commonwealth Fusion Systems @cfs.energy · 21/04/2026

The Boundary Collaborators Workshop lets us and collaborating researchers tackle these challenges. That’s important work as we prepare to operate SPARC and explore new boundary physics options for ARC. 6/6

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Commonwealth Fusion Systems @cfs.energy · 21/04/2026

But clever physics techniques let us lower that heat to bearable levels. In practice, how well we manage heat at the plasma’s edge strongly influences how well the fusion process works in the plasma core. 5/6 #FusionEnergy #physics

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Commonwealth Fusion Systems @cfs.energy · 21/04/2026

SPARC & ARC will produce energy by combining the particles in superhot fusion fuel called a plasma. The plasma core is the hottest part, at >150 million degrees Celsius. But the temperature will drop toward the edge of the plasma, a region that’s the focus of a specialty called boundary physics. 3/6

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Commonwealth Fusion Systems @cfs.energy · 21/04/2026

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 🔌💡

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Commonwealth Fusion Systems @cfs.energy · 03/04/2026

4/4 As CFS CEO and Co-founder Bob Mumgaard puts it:

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Commonwealth Fusion Systems @cfs.energy · 03/04/2026

Humanity will ultimately benefit from a commercial fusion market in which companies tackle different approaches to fusion technology in parallel. That's why this partnership between CFS and Realta Fusion matters. 🧵 1/4 #FusionEnergy

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Commonwealth Fusion Systems @cfs.energy · 02/04/2026

CFS announced today we’ll design and build high-temperature superconducting (HTS) magnets for Realta Fusion in a long-term strategic partnership that’ll benefit both companies’ efforts to bring this new form of clean, affordable energy to the electricity grid. 1/4 #PowerMoves

The WHAM project at UW Madison with magnets supplied by CFS

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Commonwealth Fusion Systems @cfs.energy · 30/03/2026

3/5 That’s because we need to do a heap of prep work for each one, on top of the fact we'll need to thread each through a set of nine D-shaped toroidal field (TF) magnets before we can weld the two assemblies together. #Energy

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Commonwealth Fusion Systems @cfs.energy · 30/03/2026

With both halves of the SPARC vacuum vessel now inside Tokamak Hall, the donut shape of our tokamak is starting to make more visual sense. 1/5 #FusionEnergy

The second half of the vacuum vessel of CFS' SPARC tokamak

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Commonwealth Fusion Systems @cfs.energy · 27/03/2026

3/6 As part of CERAWeek, CFS CEO and Co-founder Bob Mumgaard sat down with Lucia Tian and Marc Spieler, two of our close working partners at Google and NVIDIA, to discuss how we're thinking about scaling fusion energy and how our technology and AI benefit from each others' advancements.

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Commonwealth Fusion Systems @cfs.energy · 06/03/2026

...And then there were two. Our D-shaped toroidal field (TF) magnets are the first of SPARC's three magnet types that we're installing, which is why our team is heads-down finishing and shipping these out of our magnet factory. 1/4 #SPARC

Two of SPARC's toroidal field magnets mounted inside Commonwealth Fusion Systems' Tokamak Hall.

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Commonwealth Fusion Systems @cfs.energy · 05/03/2026

Read CFS CEO and Co-founder Bob Mumgaard's full interview with Zawya here: www.zawya.com/en/projects/... #FusionEnergy #Energy

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Commonwealth Fusion Systems @cfs.energy · 03/03/2026

What does the path to commercial fusion energy actually look like? ⚡️ CFS Chief Science Officer and Co-founder Brandon Sorbom recently spent time with the r/fusion community as part of an AMA to answer exactly that. Here are some of our favorite insights on ARC, AI, and more 👇. 1/7

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Commonwealth Fusion Systems @cfs.energy · 05/02/2026

On a panel at #WEF26 discussing whether humanity should bet on moonshots, CFS CEO and Co-founder Bob Mumgaard didn't shy away from challenging skepticism. 1/5

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Commonwealth Fusion Systems @cfs.energy · 28/01/2026

7/7 “If you wait until fusion is obvious, you’re at the back of the queue,” Rick said. Added Jennifer, “Getting regulation right makes a country an attractive market for deployment. It lowers cost, reduces timelines, and signals seriousness.”

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Commonwealth Fusion Systems @cfs.energy · 28/01/2026

5/7 ⚡ CFS Chief Marketing Officer Joe Paluska joined a panel discussion with The Female Quotient to discuss accelerating AI innovation while enabling a growth-oriented future. Says Joe, “Fusion is the technology of our generation. The world will be completely different before and after fusion.”

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Commonwealth Fusion Systems @cfs.energy · 28/01/2026

3/7 “This idea of a moonshot being rare, or a question whether we should do it at all, is misguided,” Bob said. Human history is marked by big jumps in tech that looked unreasonable at the time: the green revolution that bred the crops that feed today’s billions, electricity that lights the world.

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Commonwealth Fusion Systems @cfs.energy · 28/01/2026

2/7 ⚡ CFS CEO and Co-founder Bob Mumgaard challenged the bad rap big “moonshot” projects can get, speaking alongside Scripps Institution of Oceanography Director Meenakshi Wadhwa, Flagship Pioneering CEO Noubar Afeyan, and LLNL Director Kimberly Budil.

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Commonwealth Fusion Systems @cfs.energy · 23/01/2026

At #WEF26 this week, it was clear fusion energy is moving steadily toward the grid and that countries should act now to benefit from its clean, safe, secure power. Here’s advice top CFS executives shared about areas like regulations and supply chains at the conference in Davos, Switzerland. 🧵1/4.

A screenshot of a newspaper headline: "Commercial fusion ow within reach"

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Commonwealth Fusion Systems @cfs.energy · 17/01/2026

We’re on a mission to deliver #FusionEnergy to the grid at scale. To every tech-savvy attendee who stopped by our booth (and grabbed a custom tattoo): Thank you for being part of the journey.

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