-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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<SEC-DOCUMENT>9999999995-06-000402.txt : 20060620
<SEC-HEADER>9999999995-06-000402.hdr.sgml : 20060620
<ACCEPTANCE-DATETIME>20060620001522
ACCESSION NUMBER:		9999999995-06-000402
CONFORMED SUBMISSION TYPE:	EFFECT
PUBLIC DOCUMENT COUNT:		1
FILED AS OF DATE:		20060619
DATE AS OF CHANGE:		20060620
EFFECTIVENESS DATE:		20060619

FILER:

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			PROSHARES TRUST
		CENTRAL INDEX KEY:			0001174610
		IRS NUMBER:				000000000
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		EFFECT
		SEC ACT:		1933 Act
		SEC FILE NUMBER:	333-89822
		FILM NUMBER:		06914247

	BUSINESS ADDRESS:	
		STREET 1:		7501 WISCONSIN AVENUE
		STREET 2:		SUITE 1000
		CITY:			BETHESDA
		STATE:			MD
		ZIP:			20814
		BUSINESS PHONE:		240-497-6400

	MAIL ADDRESS:	
		STREET 1:		7501 WISCONSIN AVENUE
		STREET 2:		SUITE1000
		CITY:			BETHESDA
		STATE:			MD
		ZIP:			20814

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	XTRASHARES TRUST
		DATE OF NAME CHANGE:	20030409

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	PROFUNDS ETF TRUST
		DATE OF NAME CHANGE:	20020531
<SERIES-AND-CLASSES-CONTRACTS-DATA>
<EXISTING-SERIES-AND-CLASSES-CONTRACTS>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006821
<SERIES-NAME>Ultra S&P500 ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018459
<CLASS-CONTRACT-NAME>ULTRA S&P500 PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006822
<SERIES-NAME>UltraShort MidCap400 ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018460
<CLASS-CONTRACT-NAME>ULTRASHORT MIDCAP400 PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006823
<SERIES-NAME>UltraShort Dow30 ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018461
<CLASS-CONTRACT-NAME>ULTRASHORT DOW30 PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006824
<SERIES-NAME>UltraShort QQQ ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018462
<CLASS-CONTRACT-NAME>ULTRASHORT QQQ PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006825
<SERIES-NAME>Ultra MidCap400 ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018463
<CLASS-CONTRACT-NAME>ULTRA MIDCAP400 PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006826
<SERIES-NAME>Ultra Dow30 ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018464
<CLASS-CONTRACT-NAME>ULTRA DOW30 PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006827
<SERIES-NAME>Ultra QQQ ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018465
<CLASS-CONTRACT-NAME>ULTRA QQQ PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006828
<SERIES-NAME>Short S&P500 ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018466
<CLASS-CONTRACT-NAME>SHORT S&P500 PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006829
<SERIES-NAME>Short MidCap400 ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018467
<CLASS-CONTRACT-NAME>SHORT MIDCAP400 PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006830
<SERIES-NAME>Short Dow30 ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018468
<CLASS-CONTRACT-NAME>SHORT DOW30 PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006831
<SERIES-NAME>Short QQQ ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018469
<CLASS-CONTRACT-NAME>SHORT QQQ PROSHARES
</CLASS-CONTRACT>
</SERIES>
<SERIES>
<OWNER-CIK>0001174610
<SERIES-ID>S000006832
<SERIES-NAME>UltraShort S&P500 ProShares
<CLASS-CONTRACT>
<CLASS-CONTRACT-ID>C000018470
<CLASS-CONTRACT-NAME>ULTRASHORT S&P500 PROSHARES
</CLASS-CONTRACT>
</SERIES>
</EXISTING-SERIES-AND-CLASSES-CONTRACTS>
</SERIES-AND-CLASSES-CONTRACTS-DATA>
</SEC-HEADER>
<DOCUMENT>
<TYPE>EFFECT
<SEQUENCE>1
<FILENAME>primary_doc.xml
<TEXT>
<XML>
<?xml version="1.0"?>
<edgarSubmission>

    <schemaVersion>X0101</schemaVersion>

    <submissionType>EFFECT</submissionType>

    <act>33</act>

    <testOrLive>LIVE</testOrLive>

    <effectiveData>
        <finalEffectivenessDispDate>2006-06-19</finalEffectivenessDispDate>
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            <entityName>PROSHARES TRUST</entityName>
            <fileNumber>333-89822</fileNumber>
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                    <seriesName>Ultra S&amp;P500 ProShares</seriesName>
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                    <classContractName>Ultra S&amp;P500 ProShares</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006822</seriesId>
                    <seriesName>UltraShort MidCap400 ProShares</seriesName>
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                    <classContractName>UltraShort MidCap400 ProShares</classContractName>
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                <existing>
                    <seriesId>S000006823</seriesId>
                    <seriesName>UltraShort Dow30 ProShares</seriesName>
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                    <classContractName>UltraShort Dow30 ProShares</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006824</seriesId>
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                    <classContractId>C000018462</classContractId>
                    <classContractName>UltraShort QQQ ProShares</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006825</seriesId>
                    <seriesName>Ultra MidCap400 ProShares</seriesName>
                    <classContractId>C000018463</classContractId>
                    <classContractName>Ultra MidCap400 ProShares</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006826</seriesId>
                    <seriesName>Ultra Dow30 ProShares</seriesName>
                    <classContractId>C000018464</classContractId>
                    <classContractName>Ultra Dow30 ProShares</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006827</seriesId>
                    <seriesName>Ultra QQQ ProShares</seriesName>
                    <classContractId>C000018465</classContractId>
                    <classContractName>Ultra QQQ ProShares</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006828</seriesId>
                    <seriesName>Short S&amp;P500 ProShares</seriesName>
                    <classContractId>C000018466</classContractId>
                    <classContractName>Short S&amp;P500 ProShares</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006829</seriesId>
                    <seriesName>Short MidCap400 ProShares</seriesName>
                    <classContractId>C000018467</classContractId>
                    <classContractName>Short MidCap400 ProShares</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006830</seriesId>
                    <seriesName>Short Dow30 ProShares</seriesName>
                    <classContractId>C000018468</classContractId>
                    <classContractName>Short Dow30 ProShares</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006831</seriesId>
                    <seriesName>Short QQQ ProShares</seriesName>
                    <classContractId>C000018469</classContractId>
                    <classContractName>Short QQQ ProShares</classContractName>
                </existing>
                <existing>
                    <seriesId>S000006832</seriesId>
                    <seriesName>UltraShort S&amp;P500 ProShares</seriesName>
                    <classContractId>C000018470</classContractId>
                    <classContractName>UltraShort S&amp;P500 ProShares</classContractName>
                </existing>
            </seriesClassContractData>
        </filer>
    </effectiveData>
</edgarSubmission>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----