The UK Fast 50 is a ranking of the country's 50 fastest-growing technology companies, based on percentage revenue growth over the last five years. Now in its fifteenth year the UK Fast 50 awards recognise revenue growth driven by leading intellectual property and are a celebration of innovation and entrepreneurship.

Nominations are open to public and private companies, large and small, in all areas of technology, from Internet specialists to life sciences, computers to semiconductors and software to telecommunications.

View the eligibility criteria here.

In order to enter the UK Fast 50, you will first need to register an account (providing a username and password), this is so you can save the form and return to it at a later date if you need to.

Once registered, you must complete the online nomination form which includes providing details of company revenues over the last five years. Each company is also required to provide soft (PDF) copies of signed accounts for years one and five. Unless a statutory exemption is being taken, these accounts should be unabbreviated and audited.

It was launched in the US in 1995 and quickly expanded worldwide; the UK Fast 50 is now in its fifteenth year and began in 1998.

We are looking for the speed of growth, so the ranking is based on the percentage of stated revenue growth over five years. We do not measure current financial performance or profitability.

For the 2012 UK Fast 50, companies are ranked based on percentage growth for each company's stated fiscal year revenues over the last five years (2007 to 2011).

The percentage revenue growth is calculated by year five revenue minus year one revenue, divided by year one revenue.