Iain Mackie Partner

Iain specialises in large-scale corporate and financial services litigation and arbitration for a mix of UK and international corporate clients, private equity houses, family offices and financial institutions.

Iain is well known in the market for his expertise in handling complex corporate litigation, including large shareholder, joint venture and post-transaction disputes. He also advises on fraud issues; the rights and obligations of directors; derivative actions and unfair prejudice petitions; insolvency issues and restructuring. Much of his work is of a multi-jurisdictional nature and he has particular expertise in matters involving private equity investments and entrepreneurs. 

He acts for banks, financial institutions and fund managers in relation to disputes concerning fund and asset management, lending/security, complex financial instruments (particularly derivatives), trade finance and internal investigations. He has extensive experience of regulatory investigations by the FCA and other regulators, both in the UK and elsewhere, and advises on market abuse and compliance issues.

He is regularly involved in advising non-UK clients involved in English law disputes, particularly in relation to international arbitrations concerning commercial and corporate matters, and in dealing with complex cross-border litigation.

Iain was head of the litigation and dispute resolution group for 12 years, and he is now focusing solely on client work.

What people are saying


"Iain Mackie is known for handling complex corporate litigation, including large shareholder and post-transaction disputes. "His attention to detail is legendary," one source notes, while a client describes him as "an astonishing intellect" and adds: "For litigation, there is no lawyer I'd rather go into battle with."

Chambers UK 2020

"Iain Mackie is a well-connected partner, with very high profile work."

The Legal 500 2019

"Iain Mackie offers robust advocacy and advice to clients in a range of corporate disputes."

The UK Legal 500 2019

"Iain Mackie is ‘an experienced and shrewd litigator and looks after clients very well’."

The UK Legal 500 2019

"He is a skilful advocate with expertise in handling corporate cases relating to directors' duties, post-M&A disputes and unfair prejudice petitions, among other matters. Sources say: 'He is superb - deceptively softly spoken and incredibly calm and pleasant in his demeanour, which hides a really steely intellect and tactical nous.'"

Chambers UK 2019

"Head of the dispute resolution department Iain Mackie is considered 'absolutely first class' by market commentators, who add that he is 'very strategic and subtle in how he gets things done."

Chambers UK 2017

Quick reads