X0202 3/A 2006-04-03 2006-04-13 0 0001335102 Cougar Biotechnology, Inc. NONE 0001296549 Belldegrun Arie UCLA SCHOOL OF MEDICINE, 10833 LE CONTE 66-118 CHS BOX 951738 LOS ANGELES CA 90095-1738 1 0 1 0 Common Stock, $.0001 par value 11102 I By Trust Common Stock, $.0001 par value 15641 I By Trust Stock Options 0.3905 2006-04-03 2014-01-01 Common Stock, $.0001 par value 153644 D Stock Options 0.3905 2006-04-03 2014-08-24 Common Stock, $.0001 par value 38411 D Stock Options 4.8163 2006-04-03 2016-02-27 Common Stock, $.0001 par value 90650 D Stock Options 4.5039 2006-04-03 2016-03-09 Common Stock, $.0001 par value 161326 D Series A Convertible Preferred Stock 2006-04-03 2016-03-09 Common Stock, $.0001 par value 99913 I By Trust Series A Convertible Preferred Stock 2006-04-03 2016-03-09 Common Stock, $.0001 par value 140764 I By Trust Warrant 8.28 2005-06-30 2010-06-30 Common Stock, $.0001 par value 35699 I By Trust Held by a trust of which the Reporting Person is a beneficiary. Held by Trust for the benefit of the Reporting Person's children, of which the Reporting Person's spouse is the trustee. The Series A Convertible Preferred Stock ("Series A") is convertible on a one-for-one basis with no additional consideration. However, pursuant to the Issuer's Certificate of Designation, the Reporting Person can convert the Series A only in the event or to the extent that such conversion would not cause the Reporting Person to beneficially hold in excess of 9.99%. /s/ Arie Belldegrun 2006-09-08