Reporting Accountant Firms in London: Guide to Providers (2026)
AC
Acumon Chartered Accountants·12 min read
This practical guide looks at companies providing reporting accountant services in London and the types of assignments they support. It is designed as an overview rather than ranking companies, with the focus on giving useful context for comparison. The selection includes larger companies with broad audit, assurance and capital markets capabilities as well as more focused specialists working with particular transaction types or market segments. Each company differs in the clients it serves, the scope of its reporting accountant work and the wider expertise available around an engagement. The aim is to make those differences clearer so readers can make a more informed choice.
Acumon
Acumon is a UK firm of chartered accountants and registered auditors providing reporting accountant services to companies, corporate groups, regulated organisations, and businesses involved in transactions requiring independent financial reporting.
The firm works with organisations ranging from growing owner-managed businesses and private companies through to larger corporate groups and regulated entities. Reporting accountant engagements are designed to provide independent financial reporting and assurance in support of corporate transactions, regulatory requirements, investment activities, and capital market processes.
Acumon provides reporting accountant services as part of its wider audit, assurance, and advisory offering. Engagements are structured around the financial information and reporting requirements relevant to each transaction, helping companies prepare documentation that meets applicable professional, accounting, and regulatory standards.
Acumon holds a Public Interest Entity (PIE) audit licence, allowing the firm to audit listed companies and other entities subject to enhanced regulatory oversight in the United Kingdom. The firm also maintains audit registrations covering Jersey, the Isle of Man, the Cayman Islands, and the British Virgin Islands, supporting corporate structures that extend across several jurisdictions.
Cross-border transactions and group structures can involve UK operating businesses, overseas subsidiaries, holding companies, and regulated entities. Reporting accountant assignments involving these structures may require coordination of financial information across different reporting environments, particularly where a transaction includes international investors, corporate groups, or entities located in offshore financial centres.
Acumon works with boards, finance teams, business owners, and professional advisers to support reporting accountant assignments while helping organisations maintain appropriate financial reporting processes, governance arrangements, and supporting documentation.
Reporting Accountant Capabilities
Acumon provides reporting accountant services across a range of organisational structures and transaction circumstances.
These include:
UK companies and corporate groups
Owner-managed businesses and growing companies
UK subsidiaries of international groups
Regulated organisations
Private companies and established businesses
Organisations operating across multiple jurisdictions
Reporting accountant engagements are typically led by experienced professionals with direct involvement throughout the assignment.
Regulatory Licences and Registrations
Acumon holds several audit registrations that enable it to support organisations operating across multiple jurisdictions.
These include:
UK statutory audit registration
Public Interest Entity (PIE) audit licence
Jersey audit licence
Isle of Man audit licence
Cayman Islands audit licence
British Virgin Islands audit licence
These registrations support work with organisations and corporate groups that include entities in both the UK and international financial centres.
Core Services
In addition to reporting accountant services, Acumon provides a range of services supporting financial reporting, corporate transactions, assurance, and governance.
These include:
Reporting accountant services
Financial reporting and assurance services
Statutory external audit
Group and subsidiary audits
Public Interest Entity (PIE) audits
Charity and not-for-profit audit
Internal audit and governance reviews
Risk management and compliance support
Reporting accountant work can be delivered alongside discussions with management and professional advisers concerning financial reporting requirements, corporate transactions, governance arrangements, and regulatory obligations.
Acumon provides reporting accountant support for organisations that are:
Preparing for corporate transactions
Raising external investment
Managing new reporting requirements
Operating across multiple jurisdictions
Strengthening financial reporting processes
Preparing for capital market activity
The firm can become involved at an early stage to help ensure that financial information, assurance procedures, and supporting documentation are appropriately prepared for the relevant transaction or reporting requirement.
Address: 1-2 Craven Road, Ealing, London, W5 2UA, UK
Kreston Reeves
Kreston Reeves provides reporting accountant and capital markets advisory services for companies preparing to list on public markets. Its corporate finance team works with businesses seeking admission to markets including the London Stock Exchange, AIM and Aquis.
Reporting accountant assignments cover financial due diligence and the reports required by nominated advisers, corporate advisers and potential investors. The company specifically lists accountant’s reports, long and short form reports, working capital reporting, historical financial information, FPPP work, pro forma information and comfort letters among its capabilities.
Key Facts
Core services: Reporting accountant, IPO support, financial due diligence, capital markets advisory
Markets: London Stock Exchange, AIM, Aquis
Reporting work: Historical financial information, working capital, FPPP, comfort letters
Location: London and South East England
Contact Information
Website: www.krestonreeves.com
Phone: +44 (0)330 124 1399
Address: 2nd Floor, 168 Shoreditch High Street, London, E1 6RA
LinkedIn: www.linkedin.com/company/kreston-reeves
Twitter: x.com/KrestonReeves
PwC UK
PwC provides reporting accountant services through its capital markets assurance practice. Its specialist team operates from London and supports companies undertaking equity and debt capital markets transactions in the UK and internationally.
The reporting accountant role covers private companies preparing for IPOs as well as listed businesses completing acquisitions, disposals, further share issues and other transactions requiring investment circulars. Services include opinions on historical financial information, financial due diligence, working capital work, reporting procedures and comfort letters.
Key Facts
Core services: Reporting accountant, capital markets assurance, IPO support
Address: 1 Embankment Place, London, WC2N 6RH, United Kingdom
LinkedIn: www.linkedin.com/company/pwc-uk
Facebook: www.facebook.com/PwCUK
Instagram: www.instagram.com/pwc_uk
Moore Kingston Smith
Moore Kingston Smith provides reporting accountant services through its transaction services and corporate finance practice. The team supports IPOs, fundraising and transactions involving listed companies, with particular relevance to equity capital markets.
Its reporting work combines financial and tax due diligence with the preparation and review of financial information needed during a transaction. Services include long and short form reports, working capital reports, pro forma financial information and reviews of Financial Position and Prospects Procedures.
Key Facts
Core services: Reporting accountant, transaction services, financial and tax due diligence
Markets: AIM, London Stock Exchange markets, Aquis
Reporting work: Long form reports, working capital, pro forma information, FPPP
Grant Thornton provides reporting accountant services for private companies going public and listed companies undertaking transactions that require an investment circular.
Its transaction advisory team works with management, boards, sponsors and nominated advisers during the financial due diligence and reporting process. Engagements are designed around the financial information and independent reporting needed for IPOs and other public company transactions, with reporting accountant work forming part of the company’s broader capital markets and deals offering.
Key Facts
Core services: Reporting accountant, transaction advisory, financial due diligence
Suitable for: IPOs and listed-company transactions
Stakeholders: Boards, sponsors and nominated advisers
BDO has a dedicated reporting accountant offering within its deal advisory and capital markets practice. The company supports businesses preparing for IPOs on AIM, the London Stock Exchange Main Market and other public-market transactions.
Its reporting accountant work can include historical financial information, long form reports, working capital reviews, FPPP reporting, pro forma financial information and reports relating to forecasts or estimates. BDO can also provide specialist comfort letters where an offering involves US institutional investors.
Key Facts
Core services: Reporting accountant, capital markets, IPO readiness, deal advisory
Markets: AIM and London Stock Exchange Main Market
Reporting work: HFI, working capital, FPPP, pro forma reporting
Additional capability: US offering comfort letters
Location: London, UK
Contact Information
Website: www.bdo.co.uk
Phone: 020 7486 5888
Address: 55 Baker Street London, W1U 7EU, United Kingdom
LinkedIn: www.linkedin.com/company/bdo-llp
Instagram: www.instagram.com/bdo_uk
Saffery
Saffery provides reporting accountant services as part of its transaction services practice. The company supports IPOs and other capital markets transactions where directors, nominated advisers or corporate advisers require independent opinions on financial information.
Its work can involve assurance over historical financial information and forecasts together with broader transaction due diligence. London-based transaction specialists have experience with reporting accountant assignments involving both AIM and Main Market admissions.
Key Facts
Core services: Reporting accountant, transaction services, financial due diligence
Transaction types: IPOs and other capital markets transactions
Markets: AIM and London Stock Exchange Main Market
Address: 71 Queen Victoria Street, London EC4V 4BE, UK
LinkedIn: www.linkedin.com/company/saffery
Instagram: www.instagram.com/saffery_uk
Deloitte UK
Deloitte provides reporting accountant services through its Equity Capital Markets and Transactions practices. The company supports IPOs, significant listed-company transactions, equity fundraising and debt transactions in London and international markets.
Reporting accountant work typically covers historical financial information, long form financial due diligence, Financial Position and Prospects Procedures and working capital reporting. Deloitte can also provide company-side IPO support, transaction management and assistance with accounting issues arising from carve-outs or complex group structures.
Key Facts
Core services: Reporting accountant, IPO readiness, equity capital markets
Reporting work: HFI, long form due diligence, FPPP, working capital
Address: 1 New Street Square, London, EC4A 3HQ, United Kingdom
LinkedIn: www.linkedin.com/company/deloitte
Facebook: www.facebook.com/deloitteuk
Twitter: x.com/deloitteuk
Instagram: www.instagram.com/deloitte_uk
RSM UK
RSM provides equity capital markets reporting accountant services for companies entering public markets and listed companies completing subsequent transactions.
Its London corporate finance practice advises domestic and cross-border companies on IPOs, secondary fundraising and other significant transactions. Reporting accountant support sits alongside wider corporate finance and transaction services, making the company relevant where a listing or public-market transaction requires both independent reporting and broader deal advice.
Key Facts
Core services: Reporting accountant, equity capital markets, corporate finance
Crowe UK acts as reporting accountant for companies listing or undertaking transactions on UK and international public markets. Its London capital markets team covers IPO readiness, admission work and ongoing support for listed companies.
The company has acted as reporting accountant on transactions involving AIM and the London Stock Exchange Main Market. Its work includes financial due diligence and the IPO-related financial deliverables required during an admission process, with the team coordinating with management and other advisers throughout the transaction.
Key Facts
Core services: Reporting accountant, IPO readiness, capital markets advisory
Markets: AIM, London Stock Exchange Main Market, Aquis and international exchanges
Reporting work: Financial due diligence and IPO financial deliverables
Location: London, UK
Contact Information
Website: www.crowe.com
Phone: +44 (0)20 7842 7100
Address: 55 Ludgate Hill, London, EC4M 7JW
LinkedIn: www.linkedin.com/company/crowe-uk
Twitter: x.com/CroweUK
Instagram: www.instagram.com/crowe_uk
Forvis Mazars
Forvis Mazars has a dedicated reporting accountant service within its capital markets and IPO support offering. The company supports businesses preparing for public-market admission and works with nominated advisers and other parties involved in the listing process.
Its reporting accountant work includes accountant’s reports on financial information, long form due diligence, working capital reports, pro forma financial information and consent or comfort letters. The company has financial advisory and capital markets specialists based in London.
Key Facts
Core services: Reporting accountant, IPO support, capital markets, financial advisory
Reporting work: Accountant’s report, long form report, working capital, pro forma reporting
Additional services: Consent and comfort letters
Location: London, UK
Contact Information
Website: www.forvismazars.com
Phone: +44 (0) 20 7063 4000
Address: 30 Old Bailey, London, EC4M 7AU, United Kingdom
PKF Littlejohn provides reporting accountant support through its London capital markets practice. The company works with businesses seeking admission to public markets and has acted as reporting accountant on both Main Market and AIM transactions.
Assignments form part of broader capital markets work that can involve audit, financial reporting and transaction support. The practice is particularly relevant to companies requiring a London-based adviser familiar with the financial reporting and due diligence requirements surrounding public-market admissions.
Key Facts
Core services: Reporting accountant, capital markets, audit, transaction support
Markets: AIM and London Stock Exchange Main Market
Transaction types: IPOs, admissions and other capital markets transactions
Address: 15 Westferry Circus, Canary Wharf, London E14 4HD
LinkedIn: www.linkedin.com/company/littlejohn
Twitter: x.com/PKF_Littlejohn
Instagram: www.instagram.com/pkf.littlejohn
HaysMac
HaysMac provides reporting accountant services for businesses undertaking IPOs and other public-market transactions. Its London team has supported AIM admissions requiring reporting accountant work under London Stock Exchange listing requirements.
The company’s published reporting accountant work covers historical financial information, accountant’s reports, Financial Position and Prospects Procedures, working capital reporting and long form financial and tax due diligence. This work can be combined with advice on corporate structuring and other accounting matters arising during preparation for admission.
UHY Hacker Young’s London practice undertakes reporting accountant assignments for IPOs and other listed-company transactions. Its capital markets work includes due diligence investigations and working capital reporting for companies preparing for admission or completing transactions after listing.
The company has experience acting as reporting accountant on AIM transactions and combines this role with audit, financial reporting and corporate finance capabilities. It also works with companies that have international operations and cross-border financial reporting requirements.
Gerald Edelman provides reporting accountant work as part of its corporate finance and IPO support services. The London practice supports companies preparing to list with financial reporting, transaction advice and regulatory work.
The company has acted as reporting accountant on admissions to the London Stock Exchange Main Market and Aquis. Reporting accountant services can be combined with wider IPO planning, financial and tax due diligence, fundraising support and other corporate finance work, giving management a single advisory team for several aspects of a transaction.
Choosing a reporting accountant company in London depends on factors such as business size, sector, process maturity and the regulatory requirements surrounding the engagement. Some companies combine reporting accountant work with wider audit, assurance, tax and capital markets support, while others concentrate on narrower transaction or market-specific assignments. The right partner should provide independent assurance while offering practical actions that help reduce risk and strengthen operational resilience. The most suitable option will therefore depend on the complexity of the transaction, the reporting requirements involved and the level of specialist support needed. This guide is intended to provide neutral context for comparing different companies and identifying a suitable fit.
AC
Written by the Acumon team
Acumon is an ICAEW-registered firm of chartered accountants and registered auditors
based in London, with offices in Pitstone, Aylesbury and Bournemouth. Need advice on
anything covered here? Talk to us.
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