Vaulted Deep, a Houston-based waste management and carbon removal company, has secured a $35 million debt facility from Mediobanca, arranged by CFP Energy, to expand its subsurface waste disposal infrastructure across the United States. According to the company, the transaction represents the largest publicly disclosed U.S. commercial debt financing for durable carbon removal secured by long-term purchase contracts. The funding will support new waste disposal sites and additional investments in technology to accelerate infrastructure development.
The financing is supported by Vaulted Deep’s existing waste service agreements and contracted carbon removal revenue, including long-term purchase agreements with buyers participating in Frontier. Frontier is an advance market commitment backed by companies including Stripe, Shopify, and Google, which purchase carbon removal services to support the development of permanent carbon removal technologies.
The facility demonstrates how long-term corporate carbon removal purchase agreements can provide the contracted revenue necessary to secure financing from established financial institutions. Rather than relying exclusively on equity investments or advance customer payments, companies developing carbon removal infrastructure can potentially use these agreements to obtain debt financing for capital-intensive projects.
Vaulted Deep has experienced substantial operational growth as demand for its waste management and carbon removal services increases. The company delivered more than 20,000 tons of carbon removal to Frontier buyers during the first half of 2026, exceeding the total amount delivered throughout 2025.
Since 2023, the company has also increased its weekly waste processing volume sixfold, reflecting the expansion of its infrastructure and the growing adoption of its subsurface disposal technology.
Vaulted Deep develops and operates infrastructure that permanently stores organic waste in stable geological formations deep underground. Its technology offers an alternative to conventional waste disposal methods, including land application, landfilling, and incineration.
The company works with municipalities, industrial operators, and agricultural producers to manage difficult-to-dispose-of organic waste streams. By using deep well injection technology, Vaulted Deep aims to expand waste disposal capacity while reducing potential environmental impacts associated with surface disposal and permanently removing carbon from the atmosphere.
The new financing will accelerate the development of additional facilities through Vaulted Deep’s AI-Accelerated Site Development Platform, which combines proprietary technology with the company’s operational experience in identifying, permitting, and managing underground injection sites.
The platform integrates geological, regulatory, and waste supply information to identify potential development locations. Standardized permitting templates and regulatory guidance are designed to reduce the time required to prepare new projects for construction and operation.
Once a facility becomes operational, monitoring systems and control algorithms help maximize safe disposal capacity. The company intends to use these capabilities to establish a more standardized and replicable development process as it expands nationally.
The debt facility provides another source of growth capital alongside the $48 million in equity financing Vaulted Deep has raised to date and its $8 million XPRIZE Carbon Removal award.
Artio, a carbon insurance provider, also supported the transaction by helping reduce investment risks associated with the underlying carbon removal projects.
Together, the additional financing and technology investments are intended to help Vaulted Deep develop multiple infrastructure projects simultaneously while expanding its existing operations.
KEY QUOTES:
“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. This is a meaningful milestone for Vaulted as we move into the next phase of building infrastructure at a much larger scale.”
Julia Reichelstein, CEO and Co-Founder of Vaulted Deep
“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. Vaulted raising institutional debt to expand their site development capabilities is a great example of this theory in practice.”
Hannah Bebbington Valori, Spokesperson for Frontier
“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.”
Tyler Manchester, Head of Voluntary Carbon at CFP Energy
