Aaron Grinhaus’ practice focuses on business law, tax and estate planning, including commercial transactions, corporate  reorganization, professional corporations and asset protection and securitization.

Mr. Grinhaus is also an experienced business, tax and Fintech consultant, who advises clients on Fintech strategies, including the use of Blockchain technology, smart contracts and cryptocurrency to reduce business costs, hedge institutional friction and expedite capital raises and cross-border wealth transfer transactions. He is a recognized Fintech expert, and is program director and faculty at Osgoode Hall Law School’s “Blockchains, Smart Contracts and the Law” Certificate program. He is also the author of the textbook “A Practical Guide to Smart Contracts and Blockchain Law” (LexisNexis: 2019).

Mr. Grinhaus frequently gives presentations on a variety of business, Fintech and tax law related topics and has acted as chair, presenter and lecturer through a number of organizations including the Ontario Bar Association (OBA), RBC Dominion Securities, Osgoode Hall Law School of York University and Michigan State University College of Law, among others. He is also heavily involved in the legal community having served on the Governing Council and several section executive boards of the OBA for over a decade and having served as Director and General Counsel for several not-for-profit and charitable organizations.

Mr. Grinhaus holds law degrees from the University of Ottawa (LL.B.), Michigan State University College of Law (J.D.) and a Masters in Tax Law from Osgoode Hall Law School of York University (LL.M.)


Marisa is a business, real estate and estates lawyer with a focus on estate structuring, real estate and corporate reorganizations.

Marisa’s experience encompasses a broad range of estates and commercial issues, including asset and share sale transactions, securitization, estate administration, asset protection and corporate structuring and reorganization. She also regularly advises clients on estates, trust and real estate structuring, and frequently engages in contract negotiation and contract drafting for her clients. Marisa’s experience allows her to identify problems in commercial and real estate transactions before they occur making her a valuable advisor to any real estate or commercial investor.

In the community Marisa has actively promoted access to legal services by designing and conducting conflict resolution workshops, conflict-coaching and mediation at the Small Claims Court in low-income areas of Toronto. Marisa has also volunteered her time with the Pro Bono Canada Family Law project.

Marisa is conversant in English, Cantonese and Mandarin, and is active in the Chinese community.

In her spare time, Marisa likes to try new activities, travel, snowboard and perform music.

Marisa obtained her J.D. from Osgoode Hall Law School of York University, and prior to that, a Bachelor of Commerce degree (B.Com.) from the University of British Columbia with a specialization in Transportation and Logistics.


Family Law Counsel, Practicing in Association

Matthew practices exclusively in Family Law. Matthew provides advice and represents his clients in all areas of family law, including divorce; parenting issues such as custody and access; financial issues related to the division of property and support; and child protection matters involved the children’s aid society. Matthew regularly attends court proceedings before the Superior Court of Justice in Toronto, Brampton and Newmarket, and before the Ontario Court of Justice in Toronto.


Immigration Counsel, Practicing in Association

In practice for 25 years, Janice P. Warren has concentrated her immigration law practice on cross border migration, particularly for businesses, both large and small. Such moves may be temporary or permanent and Janice P. Warren will guide the client in finding the best path while making the process as efficient and cost-effective as possible.

Janice is highly active in the community, not just providing help to individuals and businesses seeking to move, but also educating the public on ever-changing immigration issues.


Attention Ontario Realtors: You Can FINALLY Incorporate…and Here’s How!

By: Aaron Grinhaus and Alex Di Giovanni After a years-long lobbying effort, Ontario Realtors are FINALLY allowed to reap the tax and liability protection benefits of using a Personal Real Estate Corporation (PREC). On October 1, 2020, new regulations under...

What is “Decentralized Finance” and What are the Risks?

By: Aaron Grinhaus and Alex Di Giovanni Decentralized Finance (DeFi) refers to any financial activity, from applying for a loan to trading stocks, which is built using decentralized ledger technology. This is the same technology upon which Bitcoin and other...

Capital Gains Surplus Stripping: Is It Worth It?

By Aaron Grinhaus and Marisa Lau Over the last few years many professionals, including doctors, lawyers and small- to mid-sized business owners, have been taking advantage of a tax efficient way of withdrawing cash from their corporations called capital gains...


If you have any questions about our legal services, or if you would like to schedule a consultation, please feel free to contact us using the information below.

234 Eglinton Avenue East, Suite 501 Toronto, Ontario M4P 1K5

Local 647.497.6872 | Toll Free 844.467.7270