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( Mark One ) ANNUAL REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the fiscal year ended December 31 , 2020 TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from UNITED STATES SECURITIES AND EXCHANGE COMMISSION WASHINGTON , D.C. 20549 FORM 10 - K to ( State or Other Jurisdiction of Incorporation or Organization ) 8711 River Crossing Boulevard Duke Realty Corporation Indianapolis , Indiana ( Address of Principal Executive Offices ) Commission File Number : 1-9044 ( Duke Realty Corporation ) 0-20625 ( Duke Realty Limited Partnership ) . Duke REALTY Indiana ( Duke Realty Corporation ) Indiana ( Duke Realty Limited Partnership ) Securities registered pursuant to Section 12 ( b ) of the Act : Large accelerated filer DUKE REALTY LIMITED PARTNERSHIP ( Exact Name of Registrant as Specified in Its Charter ) Duke Realty Limited Partnership : Large accelerated filer Title of Class Common Stock , $ 0.01 par value DRE Securities registered pursuant to Section 12 ( g ) of the Act : None Indicate by check mark whether the registrant is a well - known seasoned issuer , as defined in Rule 405 of the Securities Act . DUKE REALTY CORPORATION Yes □ OR Registrant's Telephone Number , Including Area Code : ( 317 ) 808-6000 Duke Realty Corporation Yes No Duke Realty Limited Partnership Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 ( d ) of the Act . Duke Realty Corporation Duke Realty Limited Partnership Indicate by check mark whether the registrant : ( 1 ) has filed all reports required to be filed by Section 13 or 15 ( d ) of the Securities Exchange Act of 1934 during the preceding 12 months ( or for such shorter period that the registrant was required to file such reports ) , and ( 2 ) has been subject to such filing requirements for the past 90 days . Yes Accelerated filer No Accelerated filer No Trading Symbol ( s ) Yes > No Duke Realty Limited Partnership Yes 冈 Duke Realty Corporation Indicate by check mark whether the registrant has submitted electronically , every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S - T ( §232.405 of this chapter ) during the preceding 12 months ( or for such shorter period that the registrant was required to submit such files ) . 35-1740409 ( Duke Realty Corporation ) 35-1898425 ( Duke Realty Limited Partnership ) ( I.R.S. Employer Identification Number ) NO Duke Realty Limited Partnership Yes No Duke Realty Corporation Indicate by check mark whether the registrant is a large accelerated filer , an accelerated filer , a non - accelerated filer , a smaller reporting company , or an emerging growth company . See the definitions of " large accelerated filer " , " accelerated filer " , " smaller reporting company " , and " emerging growth company " in Rule 12b - 2 of the Exchange Act . ( Check one ) : Duke Realty Corporation : Non - accelerated filer 46240 ( Zip Code ) Non - accelerated filer Name of Exchange on Which Registered New York Stock Exchange Smaller reporting company If an emerging growth company , indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13 ( a ) of the Exchange Act . o Smaller reporting company Yes > Yes No No Emerging growth company Emerging growth company