Trethewey, Paul R., Professional Corporation
1 lawyer · City of Toronto
One of 2,345 law firms listed in Toronto, and one of 764 handling Business & Corporate Law.
About Trethewey, Paul R., Professional Corporation
Trethewey, Paul R., Professional Corporation is a sole-practitioner business and corporate-commercial law firm at 330 Bay Street in downtown Toronto. Paul R. Trethewey has practised business and corporate-commercial law since 1977, advising a largely owner-managed clientele on shareholder and partnership agreements, business entity structuring, and disputes between owners and partners. The practice also covers tax-motivated corporate reorganizations, objections to tax assessments, commercial contracts, computer and technology agreements, financing, competition law, employment agreements, and intellectual property work such as trademarks, copyrights, and patent licensing.
Trethewey holds an honours B.A. and completed graduate seminar work at the University of Toronto, an LL.B. from Osgoode Hall Law School (1974 to 1977), and an LL.M. from the London School of Economics. Before setting up an independent practice, Trethewey worked at several Toronto law firms and later served as corporate legal counsel to an aviation company, handling international aircraft leasing agreements. Outside the practice, Trethewey wrote about an eleven-day, 4,000 kilometre BMW dual-sport motorcycle tour through South Africa and the Kingdom of Lesotho for Inside Motorcycle Magazine.
Practice areas
Milestones & recognition
- Paul R. Trethewey earned an honours B.A. and completed graduate seminar work at the University of Toronto, then an LL.B. from Osgoode Hall Law School (1974 to 1977) and an LL.M. from the London School of Economics.
- As an associate at Campbell, Godfrey & Lewtas (1980 to 1983), a full service firm, Trethewey worked on major mergers and acquisitions.
- As a partner at Beard Winter Gordon (1983 to 1988), Trethewey acted as counsel or co-counsel on a trademark case, an anti-dumping case, and a labour law case.
- As a partner at Wolley, Dale & Dingwall (1988 to 1992), Trethewey chaired the firm's Precedent Committee and worked on tax-motivated corporate reorganizations and software licensing agreements.
- As corporate legal counsel to SkyLink Aviation Inc. (1998 to 2001), Trethewey established procedures and agreements for international aircraft leasing and handled tax court litigation.
In the community
- Trethewey served on the board of directors of the Ontario Federation of Trail Riders, as vice president, beginning in 2013.
- Trethewey served on the board of directors of the Canadian Association of Psychoanalytic Child Therapists from 2010 to 2013.
Good to know
Wheelchair accessible
By appointmentWho handles what
The neighbourhood
The firm's office is at 330 Bay Street, an office building in Toronto's financial core that was built in 1925 and designed by the Toronto architecture firm Chapman and Oxley, known for their Beaux Arts style and also responsible for the Palais Royale and the Princes' Gates at Exhibition Place. The building connects into the PATH system, in the stretch of Bay Street that has long been home to Toronto's banks and law offices, a fitting setting for a corporate-commercial practice.
Frequently asked questions
- What kind of law does Trethewey, Paul R., Professional Corporation practise?
- The firm handles business and corporate-commercial law, including shareholder and partnership agreements, corporate reorganizations, financing, employment agreements, and intellectual property matters such as trademarks and patent licensing.
- Can the firm help with a shareholder or partnership dispute?
- Yes. The practice covers management and resolution of shareholder disputes, partnership disputes, and remedies for breach of fiduciary duty.
- Does the firm handle trademark and intellectual property work?
- Yes. Practice areas include registration, protection, and licensing of trademarks, copyrights, and trade secrets, and assignment and licensing of patents.
- Can the firm help set up or reorganize a business?
- Yes. The firm advises on business corporations, shareholder agreements, partnerships, and tax-motivated corporate reorganizations.
- Where is the firm located?
- The firm is at 330 Bay Street in downtown Toronto, in the city's financial district.
- How long has Paul Trethewey been practising law?
- Paul R. Trethewey has practised business and corporate-commercial law since 1977.
Where to find them
330 Bay Street, Suite 900A, Toronto, ON M5H 2S8 · 416-862-2225
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Bankruptcy & InsolvencyListing compiled from the firm’s public website in September 2026. Verify licence status in the Law Society of Ontario directory ↗