Because reputations matter

Greenbrook is a corporate and financial communications firm with a focus on the investment industry and special situations.

We work with dedication and discretion, providing clients with bespoke communications advice to support their business objectives.

A deep understanding of
our clients is fundamental

Corporate and Financial Communications
With decades of experience working across sectors and with high profile organisations, Greenbrook provides advice to companies and individuals on all aspects of their communications.

Financial Services and Alternative Investment
Greenbrook has specialist expertise in financial services, asset management and the alternative investment industries. A deep understanding of the complexities and nuances of these industries is integral to delivering the most valuable advice. Greenbrook’s service includes advising clients on fundraising, launches, transactions, portfolio company situations and litigation issues.

Because each organisation
and situation is unique

Greenbrook offers sophisticated communications advice. Based on considerable experience and proprietary research, it is tailored to fully address the complexities of each situation.

The team has a comprehensive understanding of our clients’ practices, objectives and their position in the wider marketplace, delivering an optimal communications service.

We believe that research and planning are vital — by preparing thoroughly, we maintain the ability to respond swiftly to unexpected developments. This approach significantly mitigates levels of reputational risk.

Delivering value through a bespoke,
comprehensive communications strategy

Greenbrook takes a comprehensive approach to communications, working alongside clients to deliver maximum value.

Our areas of expertise include:


Alternative Asset Management
Greenbrook is specialised in communications across alternative asset classes including private equity, venture capital, growth capital and hedge funds. The team also has extensive experience of working with distressed investors, turnaround specialists, debt platforms and real assets including real estate, infrastructure and energy.

Special Situations and Crisis Communications
The team is adept at handling complex and sensitive situations as they arise. Greenbrook advises on a full range of corporate issues, including succession management, financial reporting, debt re-structuring, ownership changes and legal disputes.

Greenbrook offers leading expertise in managing communications for individual capital raising efforts across asset classes, devising strategies to support the investment case throughout the process. The team has advised on some of the most successful private equity fundraisings since the financial crisis.

IPOs and P2Ps

Greenbrook offers comprehensive communications services to support financial transactions, both domestic and cross-border. We have co-coordinated international communications campaigns for multi-billion dollar acquisitions and disposals.

Internal Communications
We offer guidance and material support for internal communications and employee engagement.

Individuals and Entrepreneurs
Greenbrook advises individuals on their personal communications strategies and public relations.

We ensure our clients are well equipped to present their organisation in the best way possible and offer intensive one-to-one sessions or group training as needed.

Digital Strategy
Digital, online and social platforms have transformed the media industry, generating an infinite forum for content. Whether the strategy is to engage with or leverage these media platforms, Greenbrook advises on the optimal approach to support individual business' goals.

Websites, Annual Reports and Marketing Materials
Greenbrook offers advisory and execution services on websites, annual reports and marketing materials - from research and drafting to design and brand.

Corporate Social Responsibility and Environmental Social Governance
Greenbrook advises clients on communications strategies to support their CSR and ESG implementation.

Public and
Regulatory Affairs

Greenbrook collaborates with partners to ensure that our clients are receiving the best possible public and regulatory affairs advice, which is coordinated with the overall communications approach.

The senior team

Andrew Honnor

Andrew Honnor
Managing Partner

Andrew, Greenbrook's Managing Partner, founded the firm and brings over 20 years of financial, corporate and political communications experience to Greenbrook. He started his career working on political campaigns in both the UK and United States and was formerly a UK Government Special Advisor.

Over the last two decades he has worked on numerous communications campaigns and advised firms including British Airways, Goldman Sachs, RBS and News Corporation. Andrew has developed leading expertise in advising global investment businesses on all areas of communications and risk management.

He is an expert on issues such as exit and investment activity, fundraising, partnership issues, advice to portfolio companies, tax investigations, judicial inquiries, and civil/criminal proceedings.

Prior to founding the business in February 2012, Andrew was a member of the Executive Committee at News International, advising the company following the phone hacking crisis.

Charlotte Balbirnie

Charlotte Balbirnie

Charlotte has over 13 years’ experience in financial and corporate communications.

Previously, she worked at M:Communications where she focused on reputation management, litigious situations, issues management, transactions, corporate governance and digital communications.

She has advised a broad range of both private and listed companies in the UK and internationally. Her sector experience is diverse, with a focus on financial services, asset management, investment banking and corporate finance.

Prior to this, Charlotte worked at Bell Pottinger’s Corporate & Financial practice.

Georgiana Brunner

Georgiana Brunner

Georgiana brings over a decade of experience in corporate, consumer and financial communications. She previously held a senior position within the communications team at leading private equity firm Apax Partners, where she was responsible for internal and external communications globally.

Prior to this, Georgiana was a Director at PR agency Citigate Dewe Rogerson, advising a broad range of clients from start-ups to multinationals. Her sector experience is wide, having worked with blue-chip clients in the private equity, corporate finance, financial services, professional services, fund management and technology industries.

She also has significant crisis communications and issues management experience, handling situations for both b2b and consumer-focused clients over the years.

Matthieu Roussellier

Matthieu Roussellier

Matthieu joined Greenbrook from the leading private equity firm Permira, where he was a member of the External Affairs Team with responsibility for communications across Europe, Asia and North America. He has strong experience of all aspects of financial and corporate communications including transactions, fundraising, issues management, marketing, digital media and internal communications.

Prior to joining Permira, Matthieu worked for a financial communications firm in London.

He started his career in political communications and holds an MPhil in Politics from Oxford University.

Dedicated team

We are passionate about the industries we serve and the practice of communications.

We have advised some of the world's largest and most high profile multi-national corporations and financial institutions.

We believe our experience and expertise, combined with our approach and network, presents a compelling communications offering, which delivers considerable value to our clients.

Greenbrook careers

Experienced professionals If you are interested in being part of Greenbrook, please contact

Graduates We're always looking for the next generation of outstanding communications professionals. If you're diligent, inquisitive and irrepressibly enthusiastic, please send your CV and a covering letter to

To get in touch

Phone: +44 207 952 2000 (24hr number)


7-8 Stratford Place,

Nearest tube: Bond Street Station

International reach

Greenbrook has established working relationships with an international network of leading independent communications firms and professionals. We are practiced at executing complex communications campaigns across multiple geographies.