Vaulted Deep

Vaulted Deep

Biomass carbon removal via deep injection

Overview

Vaulted Deep provides waste management services and sells permanent carbon removal credits. It uses a proprietary slurry-injection method to bury biomass waste deep underground, turning wastes like biosolids and food waste into a slurry that is injected about a mile down into porous rock layers to achieve long-term storage. The process also prevents methane and other pollutants from being released by landfilling or incineration, and revenue comes from waste disposal fees plus verified carbon credits sold through a large buyer coalition led by Frontier. The company differentiates itself by using Advantek’s decades of oil-and-gas deep-well injection know-how and infrastructure to scale quickly, and its goal is to provide practical, scalable deep-geologic carbon removal that helps customers meet climate targets.

Funded Recently
Significant Headcount Growth

About Vaulted Deep

Simplify's Rating
Why Vaulted Deep is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Industrial & Manufacturing

Energy

Financial Services

Company Size

51-200

Company Stage

Debt Financing

Total Funding

$75.3M

Headquarters

Houston, Texas

Founded

2023

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Simplify's Take

What believers are saying

  • Vaulted raised $35 million debt from Mediobanca on September 21, 2026.
  • It delivered over 20,000 tons to Frontier buyers in first-half 2026, topping all 2025.
  • Google and Microsoft contracts extend demand, while Colorado and nationwide site plans expand.

What critics are saying

  • EPA still reviews Monarch Fields permits in 2026; denial blocks Vaulted's expansion plan.
  • Accomack County killed Vaulted's Virginia project in January 2026 after zoning backlash.
  • A groundwater contamination event would crater permits, buyer trust, and Microsoft and Frontier revenue.

What makes Vaulted Deep unique

  • Vaulted Deep uses proven deep-well slurry injection, not speculative carbon chemistry.
  • Its Frontier contracts and waste fees finance infrastructure, unlike credit-only CDR startups.
  • Advantek's decades-old Kansas and California operations give Vaulted rare permitting and execution depth.

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Funding

Total Funding

$75.3M

Above

Industry Average

Funded Over

3 Rounds

Debt funding comparison data is currently unavailable. We're working to provide this information soon!
Debt Funding Comparison
Coming Soon

Benefits

Hybrid Work Options

Growth & Insights and Company News

Headcount

6 month growth

↑ 69%

1 year growth

↑ 69%

2 year growth

↑ 64%
Carbon Market Pulse Limited
Sep 21st, 2026
US biomass burial developer secures $35 mln in debt to expand national buildout « Carbon Pulse

This page is intended to be viewed online and may not be printed. As per our terms and conditions, the republication or redistribution of Carbon Pulse content can result in the suspension or termination of your subscription.

PR Newswire
Sep 21st, 2026
Vaulted Deep secures $35 million in debt financing to expand nationwide.

Vaulted Deep secures $35 million in debt financing to expand nationwide. Sep 21, 2026, 09:05 ET New financing from Mediobanca and facilitated by CFP Energy will support new waste disposal sites across the country and continued investment in technology to accelerate site development HOUSTON, Sept. 21, 2026 /PRNewswire/ - Vaulted Deep, a waste management company building subsurface infrastructure for organic waste, today announced a $35 million debt facility from Mediobanca to expand its national buildout. The financing, arranged by CFP Energy, a leading provider of market-based energy transition solutions, is the largest publicly disclosed U.S. commercial debt deal in durable carbon removal to be secured by long-term purchase contracts. It demonstrates how such contracts can help companies borrow from mainstream lenders to build physical infrastructure. The facility was supported by Vaulted's waste service agreements and contracted carbon removal revenue, including its set of offtakes with Frontier buyers. Frontier is an advance market commitment backed by companies including Stripe, Shopify, and Google. Vaulted delivered more than 20,000 tons of carbon removal to Frontier buyers in the first half of 2026, surpassing the total amount delivered in 2025. Since 2023, the company has also increased weekly waste volume sixfold, reflecting its ability to scale operations alongside demand. "Waste operators across the country need new options as traditional disposal options become limited. This financing lets us take on more projects and invest in the tools that help us evaluate and develop new sites faster," said Julia Reichelstein, CEO and Co-Founder of Vaulted Deep. "This is a meaningful milestone for Vaulted as we move into the next phase of building infrastructure at a much larger scale." The new capital will help Vaulted advance more projects through its AI-Accelerated Site Development Platform, which combines proprietary technology and operating experience across site discovery, permitting, and injection operations. Geology, regulatory, and waste-supply data narrow the search for candidate sites while standardized templates and regulatory guides speed up the path to permitting. Once a site is running, monitoring and control algorithms maximize safe disposal capacity. Together, these tools make new sites faster to open and easier to replicate. "Frontier's theory of change is that robust demand for carbon removal, in the form of large, multi-year offtake agreements, gives companies the ability to raise the capital required to build and expand their businesses," said Frontier spokesperson Hannah Bebbington Valori. "Vaulted raising institutional debt to expand their site development capabilities is a great example of this theory in practice." Tyler Manchester, Head of Voluntary Carbon, CFP Energy said: "By facilitating these types of transactions, we connect institutional capital with innovative climate technologies, helping accelerate the deployment of high-integrity carbon removal solutions. It reflects growing investor confidence in these solutions, driven by rising demand from corporate buyers seeking permanent pathways to support net-zero commitments and long-term climate strategies." The facility adds a new source of growth capital alongside the $48 million in equity Vaulted has raised to date and its $8 million XPRIZE Carbon Removal award. The capital positions Vaulted to advance multiple infrastructure projects as it builds beyond its existing operations. Artio, a leading carbon insurance firm, supported the transaction by helping to de-risk the investment, as part of its wider work to unlock capital for high-quality carbon projects. About Vaulted Deep Vaulted Deep builds and operates subsurface infrastructure for organic waste, creating a scalable alternative to land application, landfilling, and incineration. Using proven deep well injection technology, the company stores waste deep underground in stable geologic formations. It works with municipalities, industrial operators, and agricultural producers to expand disposal capacity for hard-to-manage waste streams. By placing the waste deep underground, Vaulted reduces potential impacts on local land, air, and water that can come with surface disposal, while permanently removing carbon. Its infrastructure is permitted, operating, and designed to scale. Learn more at vaulteddeep.com. About CFP Energy CFP Energy is a leading specialist in carbon and environmental markets, helping large organisations navigate complex regulatory environments and volatile market conditions. With 20 years of experience and 9 offices across Europe, CFP Energy has built deep expertise across all major compliance carbon markets, including the EU and UK ETS. Alongside access to environmental markets, CFP Energy offers a broader suite of services across gas and power, as well as voluntary carbon, biofuels and financial products. Through tailored market access services and financial solutions, the company acts as a strategic partner, helping businesses unlock liquidity, support investment and drive commercial growth throughout the energy transition. SOURCE Vaulted Deep

Axios
Sep 21st, 2026
Vaulted Deep secures $35M debt financing from Mediobanca for US carbon removal expansion

Vaulted Deep, a carbon removal company, has secured up to $35 million in debt financing from Italian bank Mediobanca to expand its operations in the United States. The deal marks a notable development for the carbon removal sector, where this type of financing has been uncommon until now. The funding will support Vaulted Deep's buildout efforts across the country as it scales its carbon removal technology and infrastructure.

InnovationMap
Jul 8th, 2026
Venus Aerospace closes $91 million Series B to scale hypersonic engine.

Venus Aerospace closes $91 million Series B to scale hypersonic engine. Jul 8, 2026, 8:15 am Houston-based Venus Aerospace has closed a $91 million Series B round and plans to scale the production of its hypersonic engine. The round was led by Houston-based Mercury Fund with participation from Lockheed Martin Ventures, MESH, PEAK6, Draper Associates, Starboard Star Venture Capital, Green Sands Equity and other investors, according to a news release. The investment comes about a year after Venus completed the first U.S. flight test of its high-thrust rotating detonation rocket engine (RDRE). The engine is expected to enable vehicles to travel four to six times the speed of sound from a conventional runway and is about 15 percent more efficient than traditional alternatives, according to the company. Venus Aerospace says the latest round of funding will allow it to move the RDRE from demonstration to deployment and meet customer requirements for the near-term defense and space industries. The company says that the reusable RDRE is designed with a "common propulsion architecture" that can work for multiple industries and mission types. "This financing marks an important step in moving Venus from breakthrough demonstration to scaled capability," Sassie Duggleby, co-founder and CEO, said in the news release. "Our customers need propulsion systems that go farther, can be produced reliably and are built on supply chains they can trust. We are advancing that capability with American engineering and manufacturing talent to strengthen U.S. defense, expand space access and support the future of high-speed flight." Venus Aerospace raised a $20 million Series A in 2022, led by Wyoming-based Prime Movers Lab. At the time, the company said it would put the funding toward three main technologies: a next-generation rocket engine, aircraft shape and leading-edge cooling system. The company also picked up an investment from Lockheed Martin Ventures, the investment arm of aerospace and defense contractor Lockheed Martin, in November 2025 - in addition to funding from other investors over the years. "Since our initial investment, Venus has progressed very quickly in its technology development," Chris Moran, vice president and general manager of Lockheed Martin Ventures, added in the release. "Our reinvestment in Venus recognizes Venus' accomplishments to date and focus on speed to manufacture, cost management and reduction of supply chain constraints. Venus is working effectively to position its propulsion system for the production scale required by defense programs." "Venus is exactly the kind of company Houston capital should be backing," Blair Garrou, co-founder and managing partner at Mercury Fund, added in the release. "It combines multiple frontier technologies, domestic manufacturing and clear commercial and national security relevance. We believe this team is positioned to lead an important new chapter in defense and space, and we are proud to support a company building breakthrough technology here in Texas." Venus Aerospace and Houston clean tech startup Vaulted Deep were named to the World Economic Forum's Technology Pioneers community earlier this summer. Read more here.

PR Newswire
May 19th, 2026
Vaulted Deep named to 2026 CNBC Disruptor 50 as waste tonnage grows 200% year-over-year

Vaulted Deep, a waste management company building subsurface infrastructure for organic waste, has been named to CNBC's 2026 Disruptor 50 list. The Houston-based startup is introducing the first new major disposal pathway for hard-to-manage organic waste in decades. The company's Great Plains facility in Kansas has seen managed waste tonnage grow nearly 200% year-over-year in Q1 2026. Using deep well injection technology, Vaulted stores waste in stable geological formations thousands of feet underground, offering an alternative to landfilling, land application and incineration. Vaulted has raised $48 million from investors including Prelude Ventures, Lowercarbon Capital and Earthshot Ventures. The company is expanding across California and Colorado, with permits filed for several new sites as it builds towards a national infrastructure footprint.

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