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Portrait of Seb Orton
Areas of expertise: Corporate


Seb is a partner in the corporate team, based in the London office, and has extensive experience advising both private and public companies and financial institutions. His work covers a range of corporate issues with a particular focus on IPOs, secondary fund-raisings, M&A, including public company takeovers, and assisting listed companies on corporate governance and their continuing obligations.

He has wide cross-sector experience and, over the past three years, has acted on a full range of issuer-side transactions from a FTSE250 Main Market IPO for a financial institution to a variety of smaller Main Market and AIM transactions in the retail and health and care sectors. He was seconded to Investec's Corporate Finance Group in 2004 and Citigroup's ECM legal team in 2011 and has strong links with a variety of investment banks across the UK.

Chambers UK describes Seb as ‘a known figure in the market for AIM IPOs and secondary offerings’ and as a ‘highly experienced practitioner with a wealth of knowledge’. He is also recognised in The Legal 500 for small and mid-cap flotations. He joined Penningtons Manches Cooper in 2019 from the City office of a leading international firm. Prior to that, he was a partner in the London office of a US law firm. 

Recent work highlights

  • Acting for a specialist lender on its initial public offering on the London Stock Exchange’s Main Market which valued the company at over £500 million.
  • Advising on a UK power sector acquisition which included a £20 million equity fundraising. The transaction constituted a reverse takeover under the AIM Rules for Companies.
  • Acting for the holding company of a property search portal on a complex reorganisation and subsequent placing and admission to trading on AIM. This transaction was fundamental to the company's growth strategy.
  • Advising on a £70 million firm placing, open offer and offer for subscription by a listed REIT on the London Stock Exchange’s Main Market.
  • Acting for a leading health services provider on its initial public offering on the London Stock Exchange’s Main Market. As part of the IPO, the company's largest shareholder sold the majority of its stake.

Penningtons Manches Cooper LLP

Penningtons Manches Cooper LLP is a limited liability partnership registered in England and Wales with registered number OC311575 and is authorised and regulated by the Solicitors Regulation Authority.

Penningtons Manches Cooper LLP