Legal & transaction advisory

The legal platform for venture-backed companies, investors and entrepreneurs.

Partner-led, technology-enabled counsel to founders, venture capital funds and entrepreneurs, from first cheque to exit and everything in between.

Venture financingM&ARestructuringGeneral counsel
>50financings a year
>$2.5bnaggregate transaction value
15+years of specialised venture and transactional experience

Some of our amazing clients

Felix CapitalEarlybirdHakkawiseAtlantic LabsAgainONSIMamedicaSplash TechnologyLucidLiteracy CapitalSednaBetty44pixelsUnusual GroupRockleyNewOrbitTenzoOnReSymfosCovrStubble & CoEvee184Biocol LabsKrowd
Who we are

Trusted advisors to ambitious companies and their investors.

15+ years of specialised venture and transactional experience, and more than 100 transactions across the UK, Europe, USA and APAC.

Partner-led

Senior international law firm and in-house general counsel experience on every matter.

Entrepreneur & VC focused

Advising founders, venture capital funds and growth companies.

Technology enabled

Lean, agile teams focused on execution and delivery, powered by technology.

Full lifecycle partnership

We are your partner from first cheque to exit and everything in between.

We build long-term partnerships with our clients so we can be there through every inflection point of the business, not just the next transaction.

01

Start-up

Formation, founder arrangements and early-stage documents

02

Financing

Equity and debt rounds, pre-seed to late stage

03

Growth

Commercial contracts, incentives and governance

04

M&A

Disposals, acquisitions and buy-and-build

05

Restructuring

Reorganisations, bridge funding and recapitalisations

Track record · VC financing

Over fifty financings a year, on both sides of the table.

>50deals a year
$1bn+in capital raised over the last two years
Seed → Fevery stage from pre-seed to Series F
Both sidesacting for investors and companies

Long-term partners to founders and VC funds, not one-deal advisers.

Roixon Advisory’s engagement, experience and internal entrepreneurial instinct are unmatched. A truly trusted advisor, with us every step of the way as we have scaled.
Benjamin HayCOO, ONSI
ONSI
Track record · M&A

Founder exits and acquisitions, run by a partner throughout.

Sell and buy sideacting for founders, management teams, venture-backed companies and investors
Start to finishthe same senior lawyer from heads of terms to completion

Founder exits

Sales to trade, PE and strategic buyers, including Splash Technology to RubyPlay.

Buy-and-build

Bolt-ons and platform acquisitions for corporates and PE, including Hakkawise on Arkive.

Cross-border

UK businesses sold to US, European and Australian buyers, including Symfos to KatRisk.

Restructuring

Demergers, pre-sale reorganisations and distressed acquisitions.

It would have been an impossible mountain to climb without you and the Roixon Advisory team. Thank you for the 100% availability at all hours and dedication to reaching our shared goals.
Adam WilsonCEO, Splash Technology
Technology enabled

Senior lawyers on the judgement calls. Technology on the burn and churn.

Lean and agile teams, focused on execution and delivery, working the way our clients do and using technology for faster, more accurate results.

Our technology stack

We work the way our clients work.

We use technology wherever possible to deliver faster, more accurate transaction processes, led by senior teams.

  1. Roixon Proprietary DocsOver a decade of venture financing and M&A know-how, optimised for deal execution
  2. Tailored Roixon Specific OSAn operating system to triage, process and manage matters more effectively
  3. E-signature integrationExecution and signing management at scale
  4. Intra-deal document managementIntegrated, AI-enabled document management and processing for faster, more accurate drafting
  5. Slack / WhatsAppReal-time channels with clients and deal teams
  6. Data-room managementSecure, integrated data rooms and document sharing
Workflow automation
AncillariesDocuSign and signing managementCap table maintenance
2025 year in review

2025 in numbers.

56Financings closed
$520m+Aggregate capital raised
Plus multiple
  • M&A: disposals and bolt-ons
  • Venture and senior debt
  • Joint ventures
  • Strategic commercial transactions
  • Restructurings
Rounds advised on in 2025
Pre-seed
Seed
Series A
Series B
Series C
Series D
Series E
Service areas

Three ways we work with you.

External counsel

Trusted advisers to venture-backed companies and their investors on:

Equity and debt fundraisingM&AStrategic partnershipsGeneral commercial and corporateRestructuring

General counsel

We partner with the management teams of venture-backed companies and venture capital investors, providing long-term support that scales with our clients.

Legal operations

External consultants to venture-backed growth companies on their legal operations, from advisory through implementation to scaling.

Illustrative clients

Trusted by leading founders and funds.

Felix Capital
Earlybird
Hakkawise
Atlantic Labs
Again
ONSI
Mamedica
Splash Technology
Lucid
Literacy Capital
Sedna
Betty
44pixels
Unusual Group
Rockley
NewOrbit
Tenzo
OnRe
Symfos
Covr
Stubble & Co
Eve
e184
Biocol Labs
Krowd
Senior team

The people on your deal.

Ciaran Rooney

Ciaran Rooney

Founder & Managing Partner

Founder and managing partner of Roixon Advisory. Over 15 years advising and being part of senior management teams of disruptive venture-backed businesses and VC investors. Over $2.5bn of financings and exits, IPOs, business-transforming partnerships, joint ventures and licensing deals. Solicitor of England and Wales.

Changing the paradigm of what it means to be a GC. He is a lawyer and an entrepreneur at the same time.Legal Business
Daniel Rose

Daniel Rose

Partner & Head of M&A

Leads Roixon’s M&A practice, advising founders, management teams and investors on exits, acquisitions and buy-and-build. Recent deals include Splash Technology’s sale to RubyPlay and Hakkawise’s acquisition of Arkive. Also acts as General Counsel to Unusual Group and Mamedica, bringing an operator’s view to every deal. Solicitor of England and Wales.

Buying distressed businesses means moving fast and making calls. Daniel is brilliant at both. He thinks like a buyer, not just a lawyer.YY Yau · Founder, Hakkawise
Contact

Let’s build what’s next.

Ciaran RooneyFounder & Managing Partner
ciaran@roixon.com
Daniel RosePartner & Head of M&A
dan@roixon.com