The Legal 500

Twitter Logo Youtube Circle Icon LinkedIn Icon

Keystone Law

Work 020 3319 3700
Fax 0845 458 9398

Catherine Williams

Work 020 7152 6550
Keystone Law


Catherine is an experienced corporate lawyer who has a particular focus on advising entrepreneurs, management teams and investors of venture backed, early-stage-growth companies. She has a broad sector focus (including technology, life sciences and clean tech) and has significant experience in venture funding, private equity, joint ventures, buying and selling private companies and corporate restructuring. Catherine has provided training in ‚ÄėIntroduction to Venture Capital‚Äô course and is a member of the European Astia Advisory Board, an incubator for women-led high-growth tech companies. Catherine lived and worked in Brussels and Moscow before qualifying as a lawyer in 1999. Catherine‚Äôs areas of expertise are early-stage financing debt and equity, joint ventures, shareholders‚Äô agreements, partnership agreements and LLP agreements, private equity and corporate venturing investment, mergers and acquisitions, asset and share sales, company and group restructuring and MBO and MBI transactions. Catherine‚Äôs key achievements include (i) UK investments; (ii) in various funding rounds; (iii) management team in the sale of a company; (iv) institutional investors in the sale of a company; (v) listed Australian company in an acquisition; (vi) financings and acquisition; (vii) launch of advisory corporate venturing business and corporate restructuring; (viii) venture tech fund in the set-up and management of a fund; (ix) management on a pre-pack sale of a clean tech company; (x) lead investor into Skysites Americas Ltd (telecoms); (xi) global bio-tech company in its co/com activities and restructuring.


Trained at Denton Hall 1997-1999; worked at PricewaterhouseCoopers Legal, 1999-2006; Osbourne Clarke, 2006-2012; Keystone Law, 2012.

London: Corporate and commercial

M&A: smaller deals up to £50m

Within: M&A: smaller deals up to £50m

Keystone Law counts start-ups, high-growth companies and large corporates, as well as private investors, venture capitalists and angel investors, among its clients; it has a particular focus on the TMT, healthcare and real estate sectors. Nadim Zaman advised WFL Media (trading as DesignMyNight) and its shareholders on its $30m sale to private equity-owned The Access Group; Andrew Stilton and Northern Ireland-based JP Irvine, who joined the firm from an in-house position at Translink Group, acted for pre-cast concrete products manufacturer CPM Group on its £38m sale to hard landscaping specialist Marshalls; and Catherine Williams assisted beauty services provider Blow with a £3.5m follow-on equity round investment by Unilever Ventures.

[back to top]

Venture capital

Within: Venture capital

Appreciated by clients for the 'excellent value for money' that its unique business model engenders, Keystone Law has numerous practitioners that are 'very knowledgeable' within the venture capital space and provides a 'personable and effective' service to clients including Hygea VCT plc, Buckland Capital and Ardent Media. 'Always willing to go the extra mile', Nadim Zaman provides 'genuine commercial insight' to investee companies throughout their funding lifecycle. He advised Decibel Insight on its recent equity investment round which included securing a cash injection from Fidelity’s venture arm Eight Roads with participation from John Simon, via his Ventureforgood investment entity. The 'calm, diligent and pragmatic' Catherine Williams is 'vastly experienced in venture capital transactions' for both investors and investees. Dee Sian is also recommended.

[back to top]

Back to index

Legal Developments in London

Legal Developments and updates from the leading lawyers in each jurisdiction. To contribute, send an email request to