chen, with $3.8 billion; Alexander Machkevich, with $2.8 billion• Check Point Software Technologies Ltd.(Nasdaq: CHICP) co-founder, chairman and CEO Gil Shwed and Delek Group Ltd. (TASE: DLEKG) controlling shareholder Yitzhak Tshuva, with $1.9 billion each; and diamond merchant and Africa-Israel Investmen