infoCanada Business Directory
Find accurate, phone-verified information on every company in Canada in this database of 1.5 million businesses. Search criteria include: location, employee size, sales volume, and NAICS codes.

At the Library

Books about company histories

Canadian company directories

Ontario company directories

In My Community

London Chamber of Commerce Member Directory
Search a database of 900 members in the London area.

London Economic Development Corporation
Select from "Full business directory" (excludes retail and financial sectors), "Information technology", "Life sciences" or "Manufacturing" to explore businesses in London.

Websites

Canada IT.com
Links to companies, industry and marketing information, networking groups, and venture capital sources in the following high technology areas : advanced networking and communications, information technology, microelectronics and multimedia.

Canadian Business Directory
Browse companies by province, city or service category.

Edgar
Search Edgar to find registration statements and other electronic filings for all American companies with more than $10 million in assets and five hundred shareholders.

Hoover's Online
The self-proclaimed "ultimate source for business information", Hoover's includes a searchable international company directory: search by company name, location, industry or sales volume. Each entry provides a directory listing and financial data. Larger Canadian companies are included. Also provides links to business news sources.

How to Research a Company
CanadianCareers.com offers some basic tips for researching a company or industry.

Industry Canada
This Canadian Company Capabilities section of Industry Canada's website provides a list of Canadian companies, principally exporters, with detailed information about their products, export markets and contact information. Other business directories are also listed on this site.

Manufacturers and Distributors
The Canadian Trade Index includes over 30,000 businesses.

SEDAR - System for Electronic Document Analysis and Retrieval
SEDAR is the system used for electronically filing most securities-related information with the Canadian securities regulatory authorities. The database provides access to public company and mutual fund information in the public domain.