LAWYER PROFILE
Mark Leemen

Mark Leemen

Asia-Pacific 2026

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Ranked in 1 practice area

About

Provided by A&O Shearman

Practice Areas

Mark advises Australian, New Zealand and Asian issuers and their sponsors and investment banks on cross-border equity and debt capital markets financings.

Mark has a broad corporate finance practice, representing issuers and investment banks on U.S. and international financing transactions, including and, Australian IPOs with a Rule 144A offering, high-yield and investment grade Rule 144A debt, U.S. debt private placements (USPPs) and commercial paper and MTN programs.

In addition, Mark has provided U.S. securities and corporate law advice to some of Australia’s leading companies, including BHP, Macquarie Group, Lend Lease, Transurban, Westfield, Amcor and AMP.

Mark has advised across a range of sectors including aviation, banking, energy, fast-moving consumer goods, financial services, gaming, infrastructure, media, mining and resources, pharmaceuticals, professional services, property, retailing and technology.

He has extensive transaction experience throughout Southeast Asia, having worked on major deals in Indonesia, Singapore, Malaysia and the Philippines.

In addition, Mark has provided U.S. securities and corporate law advice to some of Australia’s leading companies, including BHP, Macquarie Group, Lend Lease, Transurban, Westfield, Amcor and AMP.

Mark has advised across a range of sectors including aviation, banking, energy, fast-moving consumer goods, financial services, gaming, infrastructure, media, mining and resources, pharmaceuticals, professional services, property, retailing and technology.

He has extensive transaction experience throughout Southeast Asia, having worked on major deals in Indonesia, Singapore, Malaysia and the Philippines.

Chambers Review

Provided by Chambers

Chambers Asia & Pacific

Capital Markets: International - Australia

Band 1
Band 1

Individual Editorial

Mark Leemen is highly regarded for the provision of US law expertise from his Sydney base, frequently advising clients in relation to major capital raisings.

Strengths

Provided by Chambers

  • Mark is an excellent lawyer. He's very focused, knowledgeable, gives clear advice, always available and just very confident.

    Capital Markets: InternationalChambers Asia & Pacific

Ranked Individuals at A&O Shearman (82)

Asia-Pacific Region

Australia

Cambodia

India

  • Profile image of Gautam Narasimhan
    Gautam Narasimhan

    Banking & Finance (International Firms)

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