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London Office

This content is provided by Wallbrook.

Firm Details

Litigation Support Contacts: Alex Marine, Katherine Murray (London); Stephen Downie, William Bartlett (Hong Kong); Pepijn van Haren, Jake Lipton (New York); Ben Higgins (Dubai).

Number of Employees: 60+

Number of Languages Spoken: 30+

International Offices: 5

USPs: The sector's only B-Corp; wholly independent and employee-owned; ISO27001 certified; PI licenced in the US; full-time employees in Zurich

Firm Overview

Wallbrook is a global investigations and due diligence firm headquartered in London, with offices in Hong Kong, Dubai, Zurich and New York.

The only certified B-Corp in the intelligence and investigations industry, Wallbrook places ethics and strong governance at its core. This has led to the development of its renowned investigative ESG practice, which works closely with investors and major multinationals on human rights and ESG issues prior to acquisitions and throughout their operations. As a result, Wallbrook is a premier advisor, alongside the world’s leading external counsel, at the apex of compliance, political and ESG risks.

The firm is one of the largest independent and wholly employee-owned intelligence firms operating worldwide. It has around 60 full-time employees across all offices, drawn from backgrounds in national intelligence, law, diplomacy, academia, journalism and financial services, with language skills and jurisdictional expertise spanning the whole of the globalized economy. Approximately 60% of staff hold, or have access to, stock in the business. With no outside shareholders, this ensures high levels of talent retention and long-term collaborative thinking.

Wallbrook is also one of the few firms in its space to hold the ISO 27001 Information Security Management System certification, certified by Lloyds Register.


The core team behind Wallbrook first came together in 2007 as Billiter Partners. In 2013 Billiter merged with the private equity-backed US investigations business, Stroz Friedberg, which was itself acquired by Aon plc (NYSE: AON) in 2016.

The Due Diligence and Strategic Research team of Stroz Friedberg was subsequently spun out of Aon plc in 2018 and reformed as Wallbrook.

Main Areas of Practice

Wallbrook’s service offering supports clients’ full range of investigative requirements, from deep-dive due diligence on acquisitions, JV partners, credit opportunities or prospective senior hires, to overt and covert investigative work in response to fraud, whistle-blower allegations or in support of litigation, other internal investigations and multijurisdictional asset traces.

Wallbrook is:

  • Top rated for its M&A pre-transactional integrity diligence work;
  • Top rated for its Human Rights and ESG consultancy practice;
  • Well regarded for on complex cross-border asset traces and fraud investigations.

Practice Areas and Offices

Wallbrook's client's span a range of sectors, including but not limited to: private equity and asset managers; alternatives; private banks; Investment banks; renewables; development institutions; infrastructure; pharmaceuticals; hospitality; entertainment and sports; technology; law firms; and higher education and non-profits.


London -

1 King St, London, EC2V 8AU

+44 203 8870042

Hong Kong -

90 Connaught Road, Central,

+852 3689 0240

New York -

1177 Avenue of the Americas, New York, NY 10036

+1 212 369 1063

Dubai -

Level 3, Gate Village Building 2, Dubai International Financial Centre, 506831 Dubai

+971 44019853

Zurich -

Bleicherweg 64A, 8002 Zurich

+41 44 562 04 21