X0303 4 2009-08-05 0001097264 ALLOS THERAPEUTICS INC ALTH 0001202769 BERNS PAUL L 11080 CIRCLEPOINT ROAD SUITE 200 WESTMINSTER CO 80020 1 Chief Executive Officer Common Stock 2009-08-05 4 M 0 8000 3.14 A 239907 D Common Stock 2009-08-05 4 S 0 8000 8.1438 D 231907 D Stock Options (Right to Buy) 3.14 2009-08-05 4 M 0 8000 0 D 2007-03-09 2016-03-09 Common Stock 8000 692000 D The transactions reported on this Form 4 were effected pursuant to a 10b5-1 plan under which Mr. Berns sold a portion of his holdings for tax and estate planning purposes. The price represents the weighted average sale price for multiple transactions reported on this line. The prices of the transactions ranged from $8.14 to $8.16. Upon request of the SEC staff, Allos Therapeutics, Inc. (the "Company") or a security holder of the Company, the reporting person will provide full information regarding the number of shares sold at each separate price. Stock options vest according to the following schedule: One fourth (1/4) of the total number of shares subject to this option shall vest 12 months after the vesting commencement date and an additional one-forty-eigths (1/48) of the total number of shares subject to the option become exercisable each one-month-period thereafter, until all such shares are exercisable. /s/ David C. Clark, Attorney-in-Fact for Paul L. Berns 2009-08-07