December is usually a quieter month for UK dealmaking. Teams slow down, inboxes thin out and attention shifts to year-end planning. But for some UK companies, there was even more to celebrate in the holiday season.

In December 2025, 122 UK companies raised new funding, closing out the year with fresh capital to hire, expand and invest. From defence tech and AI infrastructure to biotech, energy and logistics, these are some of the most commercially interesting UK raises we tracked last month.

Major UK funding rounds in December

Roark Aerospace – £156.6m (Series B)

Autonomous defence and drone detection

One of the largest UK raises of the year. London-based Roark Aerospace secured £156.6m to scale its autonomous drone detection network across major global cities.

Roark’s AI-powered “Aero-Ark” platform provides real-time detection of low-altitude drones – an increasingly urgent challenge as commercial and consumer drone usage accelerates. The funding will support rapid international expansion and further development of its global sensing infrastructure, positioning Roark as a critical player in urban security and airspace governance.

Fuse Energy – £52.2m (Series B)

Decentralised renewable energy

Founded by former Revolut executives, Fuse Energy closed £52.2m at a $5bn valuation after reaching $400m ARR.

Fuse is building a vertically integrated renewable energy platform, combining asset development, consumer energy supply and decentralised grid balancing. The new capital will fund expansion into the US and Europe, alongside the launch of consumer hardware products designed to make local energy generation accessible beyond single-home owners.

Sokin – £37.3m (Series B)

Global business payments

London-headquartered fintech Sokin raised £37.3m to accelerate UK-led expansion across Asia, the Middle East and South America.

Sokin helps businesses manage cross-border payments and treasury operations across 70+ currencies and 170 countries. The funding will support new regional licences, banking partnerships and the build-out of its embedded finance infrastructure.

Nu Quantum – £45m (Series A/B)

Distributed quantum computing

Cambridge spin-out Nu Quantum secured approximately £45m in December to accelerate its quantum networking technology.

Rather than building ever-larger single quantum processors, Nu Quantum focuses on connecting multiple systems into distributed architectures – a critical step toward practical, utility-scale quantum computing. The funding supports Project Hyperion, a major UK-led initiative backed by industry and government partners.

Qargo – £24.6m (Series B)

Agentic AI for logistics

UK-based logistics software company Qargo raised £24.6m to scale its AI-driven transport management platform across Europe.

Qargo automates route planning, subcontracting and invoicing, helping logistics operators reduce empty running by up to 30%. The funding will be used to deepen its agentic AI capabilities and expand its commercial team.

KatKin – £37.3m (Series C)

Premium pet nutrition

London-based KatKin secured £37.3m to scale UK manufacturing, expand internationally and develop therapeutic nutrition products. The brand has already delivered over 100 million meals to UK households.

Oboe – £11.9m (Series A)

AI-powered personalised learning

Founded by former Spotify and Anchor executives now based in London, Oboe raised $16m (£11.9m) led by a16z to scale its AI-generated personalised learning platform.

We don’t just track the funding

The 122 UK companies funded in December are some of the most active buyers heading into 2026.

At Honch, we go beyond funding announcements. Every funded UK company comes with freshly researched decision-makers across marketing, finance, HR and tech, helping commercial teams engage while budgets are open and priorities are being set.

Why UK funded companies convert:

• Budgets unlock immediately after investment
• New senior hires reassess suppliers
• Scaling teams actively look for new tools and partners

In 2025, Honch tracked 1,225 UK companies raising funding, providing data-as-a-service to help commercial teams target organisations at the exact moment budgets unlock and buying decisions are made. The outlook for 2026 looks cautiously better, not noisier. Fewer speculative rounds, more capital going into infrastructure, AI, energy, security and life sciences, and stronger pressure on funded companies to turn growth into revenue.

That means better-qualified opportunities rather than inflated volume. We’ll be tracking the money throughout the year – every UK funding round, every senior hire and every signal that shows where spend is about to follow – so our clients can stay ahead of the market and engage first, while intent is highest.

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