X0202 4 2006-05-08 0 0001023966 ISONICS CORP ISON 0001197761 BURDEN STEPHEN J C/O ISONICS CORPORATION 5906 MCINTYRE STREET GOLDEN CO 80403 0 1 0 0 VP of Semiconductor Materials Common Stock 131996 D Stock Options 1.7010 1997-02-01 2007-02-01 Common Stock 71429 71429 D Stock Options 1.06 2001-11-13 2011-11-13 Common Stock 100000 100000 D Stock Options 1.13 2002-03-28 2007-03-28 Common Stock 9000 9000 D Stock Options .90 2003-04-04 2013-04-04 Common Stock 40000 40000 D Stock Options 1.20 2003-12-16 2013-12-16 Common Stock 50000 50000 D Stock Options 1.15 2006-05-08 4 A 0 20000 0 A 2006-05-08 2016-05-04 Common Stock 20000 20000 D A grant of 71,429 incentive stock options, such as options vesting on the following schedule: 20% of total options vesting on January 1, 1998; and an additional 5% of total options vesting after each successive three-month period of employment from January 2, 1998 through January 1, 2002. This transaction is exempt from Section 16 pursuant to Rule 16b-3(d). 20,000 shares vest on November 13, 2001 and 20,000 shares vest on November 13th of each of the years 2002, 2003, 2004, and 2005. The grant of options was subject to acceptance by the reporting person. The resporting person accepted the options on December 14, 2001. Options granted by resolution of the Compensation Committee of the Board of Directors as consideration for salary deferral. The grant of the options is subject to acceptance by the reporting person by no later than April 30, 2002, which acceptance was received. Options granted by resolution of the Compensation Committee of the Board of Directors pursuant to the 1996 Executives' Equity Incentive Plan. The grant of the options is subject to acceptance by the reporting person, which acceptance was received on April 7, 2003. Options granted by resolution of the Board of Directors pursuant to the 1996 Executives' Equity Incentive Plan. The grant of the options is subject to acceptance by the reporting person, which acceptance was received on December 16, 2003. Options granted by resolution of the Compensation Committee of the Board of Directors pursuant to the 2005 Stock Option Plan. The grant of the options is subject to acceptance by the reporting person, which acceptance was received on May 8, 2006. Options vest at a rate of 5,000 shares immediately on May 8, 2006; 5,000 vest on May 5, 2007; 5,000 vest on May 5, 2008 and 5,000 shares vest on May 5, 2009. /s/ Stephen J. Burden 2006-05-09