X0306 4 2015-12-31 0 0001175535 Whitestone REIT WSR 0001603592 Mastandrea Christine J 2600 SOUTH GESSNER, SUITE 500 HOUSTON TX 77063 0 1 0 0 VP CORPORATE STRATEGY Common Shares 2015-12-31 4 F 0 2090 12.01 D 44846 D Common Shares 2015-12-31 4 F 0 15865 12.01 D 431719 I By Spouse Represents common shares withheld by the Company to satisfy tax withholding obligations in connection with the vesting of certain restricted common shares previously granted. The reporting person disclaims beneficial ownership of these securities except to the extent of her pecuniary interest therein, and the inclusion of these shares in this report shall not be deemed an admission of beneficial ownership of all of the reported shares for purposes of Section 16 or for any other purpose. Per share value assigned by the Company to the tax withholding shares based on the closing sales price of the common shares on December 31, 2015, pursuant to the Company's 2008 Long-Term Incentive Plan. /s/ David K. Holeman, Attorney-in-Fact for Christine J. Mastandrea 2016-01-04