We help UK-listed companies meet and exceed their governance and financial reporting requirements

One Advisory is the smart choice for today’s Plcs

At One Advisory, our purpose is simple: to empower London’s listed companies to thrive.

Wherever you are on your journey, be that a growing private company ready to embark on your IPO pathway, or an established Plc contemplating a corporate transaction or navigating the latest changes to the financial reporting standards or corporate governance codes, we’re the experts who can help. At One Advisory, our mission is to allow you to focus on what you do best: growing your business.

Since 2006, our team has built deep and trusted relationships with the City’s leading capital market advisors. Over the years, we have advised and supported more than 400 Plc clients with their regulatory and reporting requirements across multiple sectors and situations, giving us unrivalled experience in guiding businesses through their listed journey.

Our knowledgeable team of professionals comprising highly skilled accountants and governance professionals are capital market specialists with a thorough understanding of Plc regulatory and reporting frameworks.

Browse our Financial Reporting & Transaction Advisory, Governance and Project Management pages to find out how we can help you, or contact us here and see how we can assist you on your journey.

IPO Engagements since 2021

With you on your journey

Who we work with

Expert Solutions

Explore our comprehensive solutions designed to guide you through your governance and financial reporting requirements with confidence and ease.

IPO and Capital Markets

Navigating the IPO process can be complex, especially with accounting and financial reporting challenges. We will guide you through this journey, ensuring clarity and efficiency, while collaborating with your other IPO advisors.

IFRS Reporting and Technical Accounting

Companies listed on the main market of the London Stock Exchange or AIM are required to prepare their accounts in accordance with IFRS. Discover how our team of experts can assist you with this process.

Accountancy

Companies are legally required to prepare financial statements and it’s crucial to ensure that they are fully compliant. See how we can support you in meeting these obligations.

Financial Reporting Valuations

We specialise in financial reporting valuations, ensuring precise assessments of debt and equity instruments. Our expertise spans various standards, including share option valuations under IFRS 2, utilising both Monte Carlo simulations and the Black-Scholes model, the valuation of derivatives under IFRS 9 and the valuation of intangible assets under IFRS 3.

Outsourcing

We understand that one size doesn’t fit all, which is why we offer flexible options, including a full retainer service and a time-spent basis package. These cover everything from management accounts and board packs to day-to-day transaction support.

Provision of named Plc Company Secretary

One Advisory has been engaged by London’s Plcs to provide a fully-outsourced company secretarial function, as named company secretary, for more than ten years.

Board and Committee Support

End-to-end Plc board and committee support, from preparation of forward agenda planners to drafting Plc quality minutes of each meeting.

MAR Compliance

Our MAR Compliance services ensure that your Market Abuse Regulation (MAR) processes, procedures and records are maintained in accordance with MAR and best practice.

IPO Readiness and Support

Our Governance team plays a critical role in preparing the board for this new environment, advising on the framework, policies and procedures.

Annual Report Review and Support

We advise on many annual reports each year across a variety of sectors, which in turn gives us insight into emerging market practice and trends.

Corporate Governance Reviews

Our tailored gap analysis will provide you with focused, pragmatic advice as to how your current practices measure up, together with our recommendations.

Shareholder Meetings

Our Governance team can provide end-to-end management of your annual general meeting (AGM) and other general meetings.

Entity Management

Maintain your statutory books and registers, monitor filing deadlines and prepare and submit the necessary Companies House forms and filings.

Executive Share Option Administration

Our executive share option (ESO) administration services will help you navigate the complex web of regulatory and filing requirements that surround securities instruments.

IPO Project Management

We offer expert IPO Project Management to streamline the complex IPO process. We handle regulatory, financial, and governance challenges, allowing you to focus on growing your business and delivering returns.

Corporate Transaction Support

We offer expert project management for corporate transactions, such as acquisitions or disposals, ensuring timely and budget-compliant completion with minimal disruption. Our structured approach and industry knowledge provide the support and confidence needed to navigate technical challenges.

De-listing Project Management

We offer expert guidance for de-listing from the London Stock Exchange, handling complex regulatory requirements to ensure a smooth and compliant process. Our support helps navigate changes in strategy, cost reduction, or private equity opportunities effectively.

Implementation and Integration of Financial Reporting and Governance Processes

We enhance your business’s success by implementing rigorous financial reporting and governance processes. Our expertise ensures regulatory compliance and robust corporate governance, saving time and costs while laying a strong foundation for your future.

Don’t take our word for it, hear from those who know us best

”IPOs are complicated and can be hugely distracting for management teams. One Advisory are experienced and technically excellent whilst also being sympathetic to a resource constrained finance team. Time and again we hear from management teams how One Advisory have taken ownership of critical workflows and delivered the required information seamlessly, freeing management to devote more time to our Sales and Broking teams to deliver a successful IPO of their business.
David Foreman, Deputy Head of PLC AdvisoryZeus

”The One Advisory team has supported a number of clients with an in-depth knowledge of IFRS and Company Law, across a broad range of technical areas – and have provided specialist accounting advice to private and listed companies across a diverse range of sectors, including GAAP analysis, preparation of financial statements and disclosure reviews. We would recommend One Advisory to companies seeking to IPO on the UK market.
Mitesh Patelia, PartnerCrowe

”One Advisory’s experience and technical expertise in delivering on an IPO engagement of companies looking to list on the main market or AIM is excellent. We worked closely with One Advisory on a main marketing listing and found One Advisory to take ownership of critical workstreams, which included the preparation of the historical financial information and the FPPP memo. We would recommend One Advisory to any company that is looking to IPO in the UK.
RSM, PartnerRSM

”Our Nomad recommended that we engage with Matt and the Governance team at One Advisory early on in our IPO timetable and I’m so glad that we did. Their advice and support as we transitioned AOTI from a private US company onto AIM was invaluable, especially in guiding our adoption and embedding of the appropriate governance frameworks. The One Advisory team were always on hand whenever needed and quickly earned the trust and confidence of AOTI’s management team. We are pleased to have retained One Advisory as our Governance and CoSec advisers post-IPO and we look forward to working together on our journey as a London listed company. I would have no hesitation in recommending One Advisory’s services to any business either on or seeking to join the LSE.
Doug Lefort, Non-Executive ChairmanAOTI, Inc

”The IPO process was new for most of our team and we were grateful for the work One Advisory did for us to enable us to prepare all of the documents that were required on a tight timeline. They are a team of experts in what they do and we have gained a lot of knowledge from working with them during this process. I would recommend any company seeking a listing in London to engage with One Advisory early on in the process.
Mark Williams, Former CEOOcean Harvest

”One Advisory's finance team have assisted us for a number of years on complex financial reporting requirements including PPAs, IFRS impact assessments and advice on specific IFRS standards, accounting for debt instruments (with embedded derivatives) and drafting IFRS and FRS 101 statutory accounts templates for multiple entities. I would have no hesitation in recommending One Advisory to companies dealing with complex reporting requirements, particularly those that arise in private equity fund structures following changes in ownership.
Richard Rose, CFOHorizon Energy

”It was our nomad that recommended that we speak to One Advisory at the outset of our IPO journey and I’m thankful, that we did. Their IPO Finance Support team were extremely professional and efficient throughout the transaction, particularly given the timescales we set for listing, as well as our recent acquisition activities that added complexity during our due diligence phase. The team at One Advisory were also very responsive and great people to deal with so we would have no hesitation whatsoever in recommending their HFI and FPPP Services as well as their IPO Project Management capabilities to other companies looking to IPO in London.
Chris Day, Former CFOLords Group Trading Plc

”One Advisory came highly recommended for delivering complex financial workstreams for IPOs, and I’m pleased to say that they absolutely delivered. They hit the tight timescales that we were working towards, with professionalism as well as personality. I would have no hesitation in recommending their services to other companies looking to IPO. One Advisory’s Governance team also provided valuable advice and support pre-IPO and I’m pleased to have retained them as our Company Secretary post-IPO, and I look forward to continuing to work together on our next chapter as a plc.
Dan Walden, CFOProcook Group Plc

”One Advisory always go that extra mile to help us, especially when our reporting deadlines are approaching. They have a flexible and pragmatic approach and listen to their clients.
Kurt Budge, Former CEOBeowulf Mining Plc

”I was recommended to speak to One Advisory by our Nomad in September, three and a half months before the AIM IPO date, as they said One Advisory will be able to deliver the complex workstreams within the tight timetable that had been set. I have to say that they absolutely delivered, hitting all of the milestones set with both professionalism and personality. CFOs are always forewarned ahead of an IPO of the significant workloads involved in the process, but I honestly cannot imagine it being possible without the assistance of One Advisory. We would have no hesitation whatsoever in recommending their IFRS conversion and FPPP Services to other companies looking to IPO in London. One Advisory’s Governance team also provided valuable advice and support pre-IPO and we’re pleased to have retained them as our Company Secretary post-IPO.
Neil Evans, CFOFacilities by ADF Plc

”The One Advisory Financial Reporting Team demonstrated exceptional professionalism and support throughout our relisting process. Despite a tight timeline, which included significant amendments along the way, they efficiently developed a comprehensive working capital model, prepared our FPPP for the expanded Group, conducted the HFI for a target company, and assembled our Proforma of Net Assets for the Admission Document. Their expertise and dedication were evident, making them a pleasure to work with, and they interacted exceptionally well with the Reporting Accountants. If you're considering listing or relisting on the stock exchange, I highly recommend their financial reporting services—they’ve been an invaluable partner for us.
Elizabeth Lake, CEOEARNZ Plc

”ONE Advisory did an outstanding job managing our HFI and FPPP workstreams during our IPO process. Their expertise and professionalism ensured everything was executed smoothly and efficiently. We highly recommend their services to any other client navigating an IPO.
Heidi Giles, CFOOptima Health Plc