Aug 11, 2025 · 38m · sourcery
How The Rarest Company On Earth Raised $75M from Altimeter · Sourcery with Molly O'Shea
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gold bands on the timeline = statements, start to end. Hover to read, click to jump. CC turns on captions
In this episode of Sourcery hosted by Molly O'Shea, Vulcan Elements CEO John Maslin discusses the company's $65 million Series A funding round and its mission to build a sovereign U.S. supply chain for rare earth magnets critical to national defense, robotics, and high-performance technology.
How this conversation actually went
Every chapter scored 0–10 on four independent dynamics. Hover any point for the reasoning behind the score. Molly holds 20.1% of the talking time here. How this is scored →
Molly as informed peer 4.1 Guest teaching 5.5 Guest disagreement 0.1 Molly pushing back 0.1
speaking balance: gold is Molly, purple is the guest (3 minute bins)
Sharpest disagreement ▶ 32:07 Doomed copy-paste China critique
John forcefully rejects conventional approaches to US manufacturing, stating that anyone attempting to blindly copy and paste China's model into the US is completely doomed.
Hardest push from Molly ▶ 8:07 Kalshi market odds pushbackMolly challenges the optimistic narrative on domestic reindustrialization by introducing Kalshi prediction market data showing only 22% odds of Trump hitting manufacturing GDP targets.
Biggest teaching moment ▶ 19:24 Magnet production technical breakdownJohn gives an intricate breakdown of rare earth metallurgy, teaching Molly the exact physics and chemistry steps from strip-casted flake to hydrogen decrepitation and magnetic alignment.
Molly holds their own ▶ 8:07 Data-backed reindustrialization queryMolly displays strong domain prep by citing macroeconomic manufacturing statistics and current GDP baseline percentages directly to the guest.
the scores for every segment, with the reasoning behind each
| Chapter | Topic | Molly as informed peer | Guest teaching | Guest disagreement | Molly pushing back | Why |
|---|---|---|---|---|---|---|
| Show Title Sequence and Facility Tour Montage | 3 | 2 | 0 | 0 | Molly introduces John Maslin and sets up the discussion around Vulcan Elements' $65M Series A fundraise. John explains the syndicate dynamics and rapid 4-week term sheet execution in a friendly, collaborative tone. | |
| The Origin of Vulcan Elements and the 21st-Century Tech Triad | 3 | 6 | 0 | 0 | Molly asks foundational questions regarding Vulcan Elements' mission. John educates her on the tech triad metaphor comparing semiconductors, batteries, and rare earth magnets to the human body. | |
| America's Re-Industrialization and Historical Lessons | 6 | 5 | 0 | 2 | Molly demonstrates strong prep by citing specific Kalshi prediction market odds and manufacturing GDP percentages to probe reindustrialization realism. John responds with historical precedents and Marco Rubio's testimony. | |
| Decoupling Supply Chains: Material, Equipment, and Ecosystem | 4 | 7 | 1 | 0 | Molly asks what decoupling means in practice. John reframes the problem, explaining that rare earths are an equipment and refining bottleneck rather than a mining availability problem. | |
| Sponsor Segment: Brex Financial Stack for Startups | 4 | 4 | 0 | 0 | Following a sponsor read, Molly asks about domestic talent and SMBs. John praises American technicians, multi-generational welders, and the cultural shift making manufacturing attractive to younger generations. | |
| Assembling the Vulcan Team and Selecting North Carolina's Research Triangle | 4 | 5 | 0 | 0 | Molly asks how Vulcan recruited its team and chose North Carolina. John details their 4-parameter geographic criteria and highlights key leadership hires from SpaceX and the Pentagon. | |
| Sponsor Segment: Turing Intelligence AI Systems | 4 | 8 | 0 | 0 | Molly asks for a technical facility walkthrough. John gives a step-by-step masterclass on manufacturing rare earth magnets from strip-cast flakes to hydrogen decrepitation, jet milling, magnetic pressing, and sintering. | |
| Physical Magnet Demonstration and Multi-Industry Hardware Use Cases | 4 | 6 | 0 | 0 | Molly prompts a breakdown of magnet use cases across hardware sectors. John conducts a physical demonstration showing flux density holding 150x weight and showcases drone motor assemblies. | |
| Current Production Milestones, Execution Speed, and DOD Contracts | 4 | 5 | 0 | 0 | Molly asks about current operational output and DOD contract wins. John details how preparatory utility work enabled rapid magnet production four months after opening despite China's export ban. | |
| Overwhelming Customer Demand and Pilot Facility Capacity | 4 | 5 | 0 | 0 | Molly inquires about handling customer demand and capital expenditure. John describes pilot capacity being oversubscribed 15x and emphasizes an aggressive culture of capital efficiency and scrappiness. | |
| Overcoming Decoupling Equipment Sourcing and Investor Alignment | 4 | 5 | 0 | 0 | Molly asks about decoupled equipment costs and working with investor Eric Kreisman. John details co-developing machinery with domestic partners and utilizing high-profile geopolitical advisors. | |
| Industry 4.0: AI Data Lakes and Recipe Optimization in Manufacturing | 5 | 6 | 1 | 0 | Molly asks about Vulcan's next-gen approach and ties in sponsor Turing on AI agents. John strongly rejects copying Chinese manufacturing models and details how Vulcan uses proprietary analytics labs to optimize magnet recipes. | |
| 12-Month Roadmap, Defense Mandates, and NDAA Country of Origin Mandates | 4 | 7 | 0 | 0 | Molly asks for the upcoming 12-month milestones. John outlines commercial facility expansion and educates on strict NDAA Section 844 provenance mandates taking effect in January 2027. |
Statements from this episode (30)
Vulcan Elements Raises $65M Series A Led by Altimeter
“So we're excited to announce that we have raised a sixty-five million dollar Series A bringing us up to a total investment to date of seventy-five million dollars. This round is led by Altimeter, so Brad Gerstner and Eric Kreisman, major participation from Raj…”
Vulcan Elements closed its Series A term sheets in four weeks
“We were able to go from initial conversations to sign term sheets in about four weeks.”
Maslin: China Produces Up to 94% of Rare Earth Magnets, US Under 1%
“China was producing over 90, up to 94% of the global supply and the US was producing less than one percent.”
Maslin: Autonomous Vehicles, AI Data Centers, and Robotics Require Rare Earth Magnets
“When you think about the next generation technologies that will define the 21st century, whether that's Autonomous vehicles or robotics or the data centers that enable AI, drone technology. All of that has to have a rare earth magnet turning that motor, sensor…”
Maslin: Every moving piece of US defense hardware requires rare earth magnets
“When you think about national security, every satellite, every drone, every missile, every tank, every ship, every submarine, every piece of hardware that moves, that the defense department uses, needs a rare earth magnet.”
Vulcan CEO John Maslin is bullish on manufacturing under Trump
“I'm bullish. I think he's already doing it. I can think of a couple of projects, you know, personally in the rare space where we can really put our thumb on the scale and make that happen. I think it's going to take an entire government and industry coalition …”
China mines 60% of rare earths but manufactures 94% of magnets
“Today, China mines 55 to 60% of the rare earths. They manufacture 90 to 94% of the magnets. They're actually importing the difference.”
Maslin: Virtually 100% of Magnet-Making Equipment Comes from China
“If China manufactures, 94% of the global supply of these magnets, where do you think all of the equipment to make those magnets comes from? It's virtually a hundred percent.”
Vulcan co-developed the first 21st-century US magnet-making equipment
“So what we had to do is we had to actually co-develop some of the first pieces of magnet making equipment in the United States in the 21st century.”
Maslin: The US has sophisticated multi-generational manufacturing talent across key states
“When you look at the SMBs, those mom and pop shops that have been doing CNC machining or welding or any other type of metal work for the last 25 years, we have incredibly sophisticated technicians in this country. We have second, third, fourth generation welde…”
Maslin: DC and Silicon Valley signaling is making industrial trades attractive again
“Through things like re-industrialization, that conference, and just all of the signaling that DC cares about this, that Silicon Valley cares about this, we're making it sexy again to some fourteen-year-old, some eighteen-year-old who says, I want to go and bui…”
Maslin: Vulcan co-founder opened one of first US magnetics labs in 20 years
“My co-founder, he's a PhD in electrical engineering with a focus on magnetics. He opened one of the first rare with magnetic slabs in the United States in two decades. Down at the University of Central Florida.”
Maslin: Vulcan Elements will pick commercial manufacturing site within months
“So one thing that we're doing with this fresh set of capital is we're moving to commercial scale. We're completing a multi-state site search right now. We're gonna be making that determination here over the next couple of months.”
Maslin: Magnet manufacturing cannot simply be turnkey push-button automated
“This is very sophisticated, advanced manufacturing. People tend to think this is buy a piece of equipment, press a button, make a magnet. That is not the case. You need to understand how every step is coupled to the next, and you need to make sure that your ra…”
Maslin: Rare earth magnets hold up to 150 times their weight
“These magnets can hold up to a 150 times their weight.”
Maslin: MP Materials operates North America's only scaled rare earth mine
“In MP materials, they operate the only scaled rare earth mine in North America right now.”
Maslin: U.S. rare earth industry needs multiple 10,000-ton facilities
“That said, we need several 10,000 ton facilities. We need several companies going and creating competition and innovating and doing this better and faster and cheaper.”
Maslin: Vulcan Elements produced and shipped magnets within four months
“And in four months, we are already producing magnets. We are making magnets and shipping them to customers qualifying them with customers across our disk drives for data centers that enable AI, automotive applications. Drones, robotics several different defens…”
Maslin: Vulcan Elements won DOD contracts across every military branch
“One thing that we're really proud of here is we've won several DOD contracts over the line, over the last nine months with every branch of the military, top priority programs, making sure that the defense industrial base has the material that it needs to go an…”
Maslin: Vulcan Elements had 500 applicants for five roles without marketing
“You know, the last five positions that we've filled, we had over 500 applications and that's with zero marketing.”
Maslin: Vulcan Elements booked over 95% of pilot facility capacity a year ago
“We actually sold it out over 12 months ago over 95% capacity, leaving a little bit for, you know, samples for customers that we really want to go and work with.”
Maslin: Vulcan Elements bought main factory equipment at 20 cents on dollar
“Some of the pieces of equipment, one of the main pieces of equipment, we were actually able to get at auction at 20 cents on the dollar, and then we refurbished it. It works perfectly. We use it every single day.”
'Chip War' author Chris Miller advises Vulcan Elements
“Chris Miller the author of Chip Wars. He's been a phenomenal advisor for a year.”
Maslin: Former Trump Deputy NSA Nadia Shadlow Advises Vulcan Elements
“Another phenomenal advisor we have is Nadia Shadlow. She's a senior fellow at the Hudson Institute. She was the deputy national security advisor for strategy under the first Trump administration.”
Maslin: Copy-pasting Chinese manufacturing methods to the US will fail
“If you're just copying and pasting China into the United States and trying to build a manufacturing business around that, you are doomed. You will absolutely fail because when you think about the unit economics, labor costs, Environmental regulations. Permits.…”
Maslin: Vulcan feeds manufacturing data into AI models within an hour
“We have a full analytics and characterization lab where within an hour of every step of the process, we're feeding that data into our own models and then training them to tell us Hey, maybe run that piece of equipment for 10 more minutes or at 10 degrees hotte…”
Maslin: Humanoid robotics reaching planned volumes could 10x global rare earth magnet demand
“If we hit the volumes that companies like Optimus or Figure AI are discussing, that could 10 X the global demand for rare earth magnets by themselves, not even touching on the other industries that are going exponential, like drones or cars”
Maslin: Vulcan Elements aims to 5x-20x factory output using software in a few years
“We're collecting all of that data, we're building out our software team, and we're thinking about how we actually implement that into our facilities so that we can five, 10, 20 X our output with the same type of machinery in a couple of years.”
DOD rules ban Chinese magnets in defense hardware by 2027
“If you look at section eight, 44 of the fiscal year, 21, NDAA, they actually banned the use of Chinese magnets and there have been follow on addendums that say by January first of 20, 27, you need any company that sells to the DOD. If there's a magnet, which i…”