These local businesses are among nation's fastest-growing companies

Eighteen local companies made Inc. magazine's annual list of the country's 5,000 fastest-growing private companies.

That's up from 14 local companies on the 2015 list. Eleven of the companies from the 2015 list appear on the list again this year. California accounts for 665 companies on the list, the largest number of any state.

The fastest-growing local company, ranking No. 151 nationwide, was SlideBelts, an El Dorado Hills company that makes sliding belt buckles. It had $2.6 million in…