Columbus, Ohio-based NetJets, a wholly-owned subsidiary of Berkshire Hathaway Inc., announced late last week that it plans to lay off 495 out of 3,000 pilots currently employed by the company. NetJets is the pioneer of fractional-ownership of small business jets which allows for partial ownership of an aircraft that is shared with other companies. The final number of laid off pilots may be slightly lower, according to Chairman and CEO David Sokol, after upcoming negotiations with the plot's union.