Greenjets and Valarian close $90 million in Series A funding

In the space of a single week, two MD One Ventures portfolio companies have closed Series A rounds totalling $90 million — a clear signal of the depth of investor conviction now behind UK-built national security technology, and of the calibre of the founders building it.

Greenjets: $40 million Series A led by Blossom Capital

Greenjets, the UK-based aerospace technology company developing propulsion systems, aircraft platforms and launch technologies, has announced a $40 million Series A led by Blossom Capital, with participation from the NATO Innovation Fund (NIF), the National Security Strategic Investment Fund (NSSIF), and existing investors including Tanglin Venture Partners, z21 Ventures and Coalition Ventures.

Greenjets is building one proprietary technology stack — spanning electric ducted fans, high-speed air platforms, VTOL aircraft, turbofan engines and launch systems — designed, developed and built in the UK. Days before the round closed, Greenjets was selected by the UK Ministry of Defence under the LCADE programme to develop a British low-cost drone interceptor, with demonstration trials later this year.

The funding scales Greenjets from 12,000 to nearly 70,000 sq ft of UK facilities, grows the team from 160 to more than 250, and takes the company from development to the production of thousands of systems over the next twelve months.

MD One first backed Greenjets at its earliest stage, when the company was a small team with a conviction that the UK could build sovereign propulsion at scale.

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Anmol Manohar, Founder and CEO, Greenjets
"We believe capital should follow proven capability, and not the other way around. This round comes after three years of rigorous R&D, validation and low-volume production. It now enables rapid growth – in production, international expansion, product expansion."

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Valarian: $50 million Series A led by NEA

Valarian, the sovereign infrastructure company providing workload-level governance, compartmentalisation and operational control for the AI systems on which governments and regulated institutions depend, has closed a $50 million Series A led by New Enterprise Associates (NEA) — the firm's first defence and dual-use investment in Europe — taking total funding to $70 million.

The round drew participation from Lightbank, XTX Markets, Sequel, LitVC and angel investors including Gokul Rajaram and Nikesh Arora, and carried public endorsement from the UK Government.

MD One backed Valarian at seed, on the thesis that as capital flowed to AI models, control of the environment those models operate inside would determine who actually holds sovereignty. That thesis is now consensus.

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Max Buchan, Founder and CEO, Valarian
"The intelligence layer of Western institutions is consolidating: quietly, contract by contract, department by department, into systems those institutions do not control. We built Valarian because sovereignty isn't a feature you can add later. It's architecture you have to build from the ground up."

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A defining week for the portfolio

Together, these rounds represent more than $90 million of new institutional capital into two MD One portfolio companies in a single week, led by two of the most respected names in venture — and validated by the NATO Innovation Fund, NSSIF and the UK Government.

Both companies were backed by MD One at the earliest stages of their journey. Both are building sovereign capability the UK and its allies cannot afford to import. And both demonstrate the core of the MD One thesis: that Europe's national security depends on domestic capital backing domestic capability, early.

Huge congratulations to Anmol, Max, and both teams.

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About MD One

Founded in 2021 as Europe's first National Security specialist VC, MD One Ventures is a Venture Capital firm, investing in Pre-Seed to Series A National Security technology companies.

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