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冈 ( Mark One ) UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington , D.C. 20549 FORM 10 - Q QUARTERLY REPORT PURSUANT TO SECTION 13 or 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the quarterly period ended September 30 , 2021 OR ☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15 ( d ) OF THE SECURITIES EXCHANGE ACT OF 1934 For the transition period from Commission File Number 001-34855 WHITESTONE REIT to ( Exact Name of Registrant as Specified in Its Charter ) Maryland ( State or Other Jurisdiction of Incorporation or Organization ) 2600 South Gessner , Suite 500 Houston , Texas ( Address of Principal Executive Offices ) ( 713 ) 827-9595 76-0594970 ( I.R.S. Employer Identification No. ) 77063 ( Zip Code ) ( Registrant's Telephone Number , Including Area Code ) N / A ( Former Name , Former Address and Former Fiscal Year , if Changed Since Last Report ) Title of each class Securities registered pursuant to Section 12 ( b ) of the Act : Common Shares of Beneficial Interest , par value Trading Symbol ( s ) $ 0.001 per share Preferred Stock Purchase Rights WSR N / A Name of each exchange on which registered New York Stock Exchange New York Stock Exchange 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 □ No 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 ) . > Yes ☐ No 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 . Large accelerated filer Non - accelerated filer П ☐ ☐ Emerging growth company ☐ Accelerated filer Small 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 .