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Skyscrapers in the city reflecting sunlight.
BUSINESS LAW

Trusted counsel for complex business challenges.

PRACTICE AREAS

With decades of business law experience, Marc Leiter has developed an expertise in advising business owners and executives on commercial transactions, mergers and acquisitions, wills and trusts, shareholders agreements and other contracts, and strategic business matters.  


Marc combines his expertise with seasoned legal judgment and a practical understanding of business, helping clients navigate complex decisions with clarity, confidence and a steady hand, tailored to the realities of your business. 

CONTACT DETAILS

Practice Areas

Business Formation, Growth & Transition

Business Formation, Growth & Transition

Business Formation, Growth & Transition

Legal guidance throughout the life of a business, from incorporation and the structuring of the shareholdings, to growth, shareholder agreements, reorganization and succession. Marc works with startups, established companies and business owners at moments of change, helping them address both the legal details and broader commercial considerations involved.

Commercial Advisory

Business Formation, Growth & Transition

Business Formation, Growth & Transition

Ongoing counsel for business owners and executives navigating important decisions, opportunities and challenges. Marc brings a business-minded perspective to corporate and commercial matters, helping clients understand their options, solve complex problems and move forward with confidence. Marc offers clear, practical advice on the agreements that keep business moving, with an eye to protecting both immediate interests and long-term relationships.

Mergers, Acquisitions & Cross-Border Transactions

Mergers, Acquisitions & Cross-Border Transactions

Mergers, Acquisitions & Cross-Border Transactions

Experienced counsel through the purchase, sale or combination of a business, including domestic and cross-border transactions. Marc has advised on transactions ranging from closely held business matters to complex eight-figure deals, guiding clients from beginning to end, with a clear understanding of the legal issues, commercial considerations and bigger business picture.

Wills, Trusts & Succession Planning

Mergers, Acquisitions & Cross-Border Transactions

Mergers, Acquisitions & Cross-Border Transactions

Thoughtful advice on wills, trusts and succession matters, helping clients plan for the future and protect the interests of their families and the  businesses they have worked to build.

Expert Advice, Trusted Counsel.

Get experienced, practical legal counsel from someone who understands the realities of business.

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About Marc Ian Leiter

Marc Leiter has built his practice on trusted advice, high-quality work and lasting relationships. After many years practising at other firms, he now brings decades of business law experience to his independent practice. 


He is known for being accessible, dependable and calm under pressure. He takes time to understand his clients’ goals, collaborates with their other advisors and focuses on practical solutions that serve their best interests. Clients receive consistent personal attention, sound judgment and a commitment to getting the work done right.


Marc is a member of the Barreau du Québec and a Life Governor of the Quebec Bar Foundation. He has been included in The Best Lawyers in Canada since 2021 in recognition of his work in corporate law.


Services are available in English and French.

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Let’s talk about your business.

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Whether you are planning a transaction, starting or growing a business, negotiating an agreement or looking for trusted ongoing counsel, Marc is available to discuss what you are trying to accomplish and how he can help. 

Contact Information

2000 McGill College Avenue, Suite 600, Montreal, QC, H3A 3H3

514-943-5019 mleiter@leiterlegal.ca

© 2026 Leiter Legal


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Photo: Jeangagnon - CC BY-SA 3.0


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