Calum Thom is an experience private equity and M&A lawyer. He advises clients on corporate transactions, including private equity, strategic mergers and acquisitions (both domestic and international), joint ventures and corporate reorganisations. Calum has experience across a broad range of sectors, with a particular focus on healthcare and life sciences sectors, but he has also acted on a number of transactions in the consumer, energy, real estate and industrial sectors.

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  • Representing Ampersand Capital in its investment with KKR in a business combination of leading life sciences reagents and custom synthesis and CDMO companies, Biosynth Carbosynth and vivitide Inc.*
  • Representing Apposite Capital on its acquisition of a majority shareholding in CrestOptics, a world leader in the development and manufacture of advanced systems for fluorescence microscopy, from XYence Capital SGR S.p.A. and management, and the spin out of its diagnostics business to management.*
  • Representing Alliance Medical on its shareholder arrangements with strategic partners in the Kingdom of Saudi Arabia.*
  • Representing BehaVR Inc., in its merger with OxfordVR Limited, a UK-based spin-out of Oxford University, backed by Oxford Science Enterprises and Optum Ventures, and focused on virtual reality for behavioural healthcare treatments.*
  • Representing Bluegem Capital in connection with various acquisitions, including of makeup brand Iconic London and on its acquisition of The Cosmetic Skin Clinic.*
  • Representing Centene Corporation, a US-listed health insurer, on various transactions, including on its acquisition of Circle Health.*
  • Representing Atalaya Capital on its investment into a real estate fund acquiring a European portfolio of hotels and commercial properties.*
  • Representing Palamon Capital on a number of transactions, including the sale of Il Bisonte S.p.A, an independent Italian luxury leather fashion accessories business, to Tokyo stock exchange-listed fashion distribution specialist, Look Holdings.*
  • Representing Hidden Harbour Capital Partners on its acquisition of the Avtron Power Solutions business carved out from Schneider Electric USA Inc.*
  • Representing Irving Oil on various transactions, including its acquisition of Whitegate oil refinery from P66 and the acquisition of the Tedcastle Group (brand Top Oil), which includes a portfolio of over 200 fuel forecourts throughout Ireland and a terminal in Dublin Port.*
  • Representing Alsco Inc., one of the world’s largest textile rental and laundry companies, in its acquisition of Clean Linen Services, a UK market-leading laundry supplier, from MML Capital Partners.*
  • Representing Socotec, a French-headquartered risk management company, backed by Cobepa and CD&R, on management incentive arrangements.*

*Denotes a matter handled prior to joining the firm.


  • University of Edinburgh, Postgraduate Diploma in Legal Practice, 2009
  • University of Aberdeen, LL.B., (Hons.), 2007
  • Maastricht University, Erasmus Program, 2005


  • Scotland, 2010
  • Recommended Lawyer in The Legal 500 UK for Private Equity Transactions (up to £250 million) and Corporate and Commercial: M&A Lower Mid-Market (2021-2024).
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