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Press Release

Grant Thornton LLP expands in Southwestern Ontario

Grant Thornton LLP, one of Canada’s leading accounting and advisory firms providing audit, tax and advisory services, is pleased to announce the opening of its new office in Windsor, Ontario and Essex, Ontario effective January 1, 2018.

Toronto ON - January 4, 2018

Grant Thornton has entered the market for the first time with the acquisition of Hyatt Lassaline LLP to expand its presence in southwestern Ontario and the Michigan border. With this latest acquisition, Grant Thornton now has 16 offices in Ontario and over 140 across Canada.

Founded in 1997, Hyatt Lassaline has been a leader in assurance, tax and business advisory in the region with an industry focus in agriculture, manufacturing, not-for-profit, hospitality and more. All 30 team members, including partners Don Lassaline, Jeff Ostrow and Sandy Anderson, will continue to work out of their offices in Windsor-Essex County, which will now operate under the Grant Thornton banner.  

“We’re thrilled to open our first office in one of Canada’s fastest-growing economies to help support clients in the community,” says Kevin Ladner, Executive Partner and CEO, Grant Thornton LLP. “Our firm is committed to Windsor-Essex for the long-term and look forward to adding value to the area for many more years to come.”  

“There is a really good fit between the two firms in terms of values and culture and we’re delighted to have the Hyatt Lassaline team onboard,” says Kevin Moshal, Managing Partner, Ontario, Grant Thornton LLP. “This new partnership will build another level of experience for our southern Ontario business unit and provide clients with even more expertise and advice to help them grow.”   

The new offices are located at 2510 Ouellette Ave, Suite 203 in Windsor, Ontario and 14 Victoria Ave in Essex, Ontario.  

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For further information, please contact:

Julie Ibrahim

Media Relations Manager

T +1 416 607 8744


About Grant Thornton LLP in Canada

Grant Thornton LLP is a leading Canadian accounting and advisory firm providing accounting, audit, tax and advisory services to private and public organizations. We help dynamic organizations unlock their potential for growth by providing meaningful, actionable advice through a broad range of services. Grant Thornton LLP is a Canadian member of Grant Thornton International Ltd, whose member and correspondent firms operate in over 130 countries worldwide. A listing of Grant Thornton offices and contact information can be found at:

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