X0306 4 2012-08-27 0 0001477032 PROSPECT GLOBAL RESOURCES INC. PGRX 0001553937 Archer Devon 1621 18TH STREET, STE 260 DENVER CO 80202 1 0 0 0 Option Right-to-Buy 2.6 2012-08-27 4 A 0 150000 0 A 2013-07-01 2022-07-01 Common Stock 150000 300000 D The option grant was approved by a committee of PGRX's board of directors on July 2, 2012, subject to shareholder approval of the proposed increase in the authorized number of shares available under the stock option plan, under which the option was granted. PGRX's shareholders approved the plan increase on August 27, 2012. Option vests 100% on July 1, 2013. Option was granted for no consideration. /s/ Jeff Knetsch, Attorney in Fact 2012-08-28