Form 485BPOS PROSHARES TRUST

ROPES & GRAY LLPPRUDENTIAL TOWER800 BOYLSTON STREETBOSTON, MA 02199-3600WWW.ROPESGRAY.COM 

September 17, 2021 

Ladies and Gentlemen: 

We are furnishing this opinion in connection with the proposed offer and sale by ProShares Trust, a Delaware statutory trust (the “Trust”), of shares of beneficial interest of ProShares On-Demand ETF (the “Shares”), pursuant to Post-Effective Amendment No. 232 on Form N-1A (the “Post-Effective Amendment”) under the Securities Act of 1933, as amended.  

We are familiar with the actions taken by the Trustees of the Trust to authorize the issuance of the Shares. We have examined the Trust’s Certificate of Trust (as on file in the office of the Secretary of State of the State of Delaware), its Agreement and Declaration of Trust, as amended, its Bylaws and such other documents as we deemed necessary for the purposes of this opinion. We assume that upon sale of the Shares by the Trust the Trust will receive the net asset value thereof.  

Based upon the foregoing, we are of the opinion that the Trust is authorized to issue an unlimited number of Shares, and that, when the Shares are issued and sold, they will be validly issued, fully paid and nonassessable by the Trust. 

We consent to the filing of this opinion as an exhibit to the Post-Effective Amendment.  

Very truly yours, 

/s/ Ropes & Gray LLP 

Ropes & Gray LLP 

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