UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549
Notice of Effectiveness
Effectiveness Date:	June 19, 2006

Form:

N-1A

CIK: 0001174610 Company Name: PROSHARES TRUST File Number: 333-89822 REFERENCED SERIES/CLASSES (CONTRACTS) Series ID Class/Contract Name S000006821 Ultra S&P500 ProShares C000018459 Ultra S&P500 ProShares Series ID Class/Contract Name S000006822 UltraShort MidCap400 ProShares C000018460 UltraShort MidCap400 ProShares Series ID Class/Contract Name S000006823 UltraShort Dow30 ProShares C000018461 UltraShort Dow30 ProShares Series ID Class/Contract Name S000006824 UltraShort QQQ ProShares C000018462 UltraShort QQQ ProShares Series ID Class/Contract Name S000006825 Ultra MidCap400 ProShares C000018463 Ultra MidCap400 ProShares Series ID Class/Contract Name S000006826 Ultra Dow30 ProShares C000018464 Ultra Dow30 ProShares Series ID Class/Contract Name S000006827 Ultra QQQ ProShares C000018465 Ultra QQQ ProShares Series ID Class/Contract Name S000006828 Short S&P500 ProShares C000018466 Short S&P500 ProShares Series ID Class/Contract Name S000006829 Short MidCap400 ProShares C000018467 Short MidCap400 ProShares Series ID Class/Contract Name S000006830 Short Dow30 ProShares C000018468 Short Dow30 ProShares Series ID Class/Contract Name S000006831 Short QQQ ProShares C000018469 Short QQQ ProShares Series ID Class/Contract Name S000006832 UltraShort S&P500 ProShares C000018470 UltraShort S&P500 ProShares