Didit, a full-service internet advertising and marketing company, has been ranked number 137 on Inc. Magazine’s 26th annual Inc. 500 list of fastest-growing companies in the United States. Didit is being lauded for having a three-year sales growth of 1,368.5 percent.

According to Didit, they recently completed “an ambitious re-branding to better reflect its growth and position within the industry”. Didit says that they provide “award-winning expertise in search engine marketing, auctioned media management and targeted online advertising.”

The 2007 Inc. 500 list from Inc. Magazine measures revenue growth of privately-held companies from 2003 through 2006. To qualify, companies must be based in the United States and privately held, independent companies. They cannot be subsidiaries or divisions of other companies as of December 31, 2006. Another requirement is that they have to have had at least $200,000 in annual revenue in 2003, and $2 million in 2006. Didit is one of only two search engine marketing companies ranked on this year’s list.

Complete information on this year’s Inc. 500, including company profiles and a list of the fastest-growing companies is available here. The list can be sorted by industry and by region.

Methodology of the Inc. 500 List

The 2007 Inc. 500 list measures revenue growth from 2003 through 2006. To qualify, companies had to be U.S.-based and privately held, independent — not subsidiaries or divisions of other companies — as of December 31, 2006, and have had at least $200,000 in revenue in 2003, and $2 million in 2006.

Founded in 1979 and acquired in 2005 by Mansueto Ventures, LLC., Inc. magazine (www.inc.com) is the only major business magazine dedicated exclusively to owners and managers of growing private companies that delivers real solutions for today’s innovative company builders. With a total paid circulation of 681,421, Inc. provides hands-on tools and market-tested strategies for managing people, finances, sales, marketing, and technology.