Toronto: The two men who created the iconic BlackBerry company have been knocked off the world billionaires' list.

With the shares of BlackBerry maker Research In Motion (RIM) getting drubbing after its less-than-expected first quarter results and poor forecasts, co-CEOs Jim Balsillie and Mike Lazaridis are no longer billionaires, Forbes said on Thursday.  According to it, the net worth of RIM's high-profile cofounders has sunk.

“Both entrepreneurs easily made our annual ranking of the World Billionaires in March, when RIM was trading above USD 60.

Lazaridis was then worth USD 1.9 billion, and Balsillie USD 1.8 billion. These days they appear to be worth in the neighborhood of USD 800 million or so,'' Forbes said.  From its value of USD 83 billion in June 2008, RIM has sunk to USD 14 billion thanks to massive cuts into market share by Apple's iPhone and Google Android devices as well as delay in replacing its aging handset line-up. 

RIM stock has lost more than 50 percent of its value since January. 

Though the stock rebounded more than 5 percent on Thursday to close at USD 29.14, this is not 'a heck of a lot' of relief for investors, Forbes said. 

Lazaridis and Balsillie, who have been running the company together since 1992 and hold 10 percent shares, made their debuts among the world's wealthiest in 2007 and have been on the list for the past five consecutive years, according to the report.

Interestingly, charity has cost the BlackBerry co-founders their position on the billionaires' list. 

Both men have been regularly selling shares earmarked for their charitable ventures. Had they not given away so much, they'd still have lost a bundle in the past few months but they would have remained billionaires, Forbes said.