International legal practice Osborne Clarke announces six new leadership appointments across its international Corporate and Commercial teams and UK Business Transactions Practice Group (BTG) today. 

Greg Leyshon: Co-Chair International Corporate Group Leader

Greg Leyshon concludes his role as Head of BTG and will take on the newly created position as Co-Chair of the International Corporate Group. Working alongside Björn Hürten, they will focus on building and strengthening Osborne Clarke's international corporate practice to support its 2025 strategy and beyond.

Having been with the firm for almost thirty years, Greg has built a wealth of private equity, corporate practice and market knowledge that makes him an asset to his clients – many of whose relationships with him span more than a decade.

"It has been a joy to serve as Head of BTG for the past nine years, and I wish Mark all the best as he moves into this dynamic, challenging and rewarding role. I look forward to working closely with Björn and our international teams to support the seamless delivery of corporate legal advice across all of our offices," said Greg. 

Mark Wesker: Head of Business Transactions Practice Group, UK 

Mark Wesker, previously International Financial Services Sector Leader takes over as Head of BTG, UK.  As Practice Group Head, Mark will oversee the UK Corporate, Financial Institutions and Commercial teams, and will also sit on the firm's Executive Board.

Mark's career at the firm spans fifteen years, having made Partner in 2014. He is a highly experienced corporate lawyer, regularly advising on a broad range of matters including business strategy, M&A, takeovers, IPOs, fundraising, joint ventures, restructuring and corporate governance. 

Helen Parsonage: Head of Financial Institutions Group, UK

Helen Parsonage is heading up the firm's Financial Institutions Group in the UK. She specialises in fund formation in the alternative asset space, with experience of multiple asset classes but with a particular focus on private equity and venture capital funds. Helen also acts for a variety of investors with regard to fund investments and segregated mandates.

Alistair Francis: Head of Corporate, UK 

Alistair Francis takes up the role as UK Head of Corporate. Advising on transactions across many different sectors, Alistair has particular expertise in relation to UK and cross-border M&A and private equity transactions. 

Tim Hewens: Head of Private Equity, UK 

Tim Hewens is stepping into the position of UK Head of Private Equity. He has specialised in private equity transactions for more than 22 years, advising private equity funds, portfolio companies, management teams and sellers, selling to private equity.

Will Robertson: Head of Commercial, UK

Will Robertson is taking over as UK Head of Commercial. Specialising in technology and privacy, he has acted for a number of household names on a variety of commercial, IT and privacy matters. Much of Will’s work is in the Retail sector, advising clients on their cross channels offerings and negotiating contracts in support of that.

Osborne Clarke's BTG practice group has 60 Partners and over 140 fee-earners working across London, Reading and Bristol and accounts for around a third of the UK business. The team produces an annual corporate M&A outlook each year that looks at deal terms trends and predicts deal characteristics and activity for the coming year. 

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