Mastandrea Christine J 4

What Happened
Christine J. Mastandrea, President and Chief Operating Officer of Whitestone REIT (WSR), had 8,991 common shares withheld to satisfy tax withholding obligations related to the vesting of restricted units. The withholding was recorded on June 30, 2026 at a per-share value of $18.96, for a total value of $170,469. This was a tax-withholding disposition (routine) rather than an open-market sale.

Key Details

• Transaction date: June 30, 2026; Form 4 filed July 2, 2026 (appears timely).
• Shares withheld/disposed: 8,991 at $18.96 per share; total value $170,469.
• Shares owned after transaction: Not specified in the information provided in this summary.
• Footnotes:
  • F1: Shares were withheld by the company to satisfy tax withholding on vested restricted units granted under the 2018 Long-Term Equity Incentive Ownership Plan.
  • F2: Per-share value ($18.96) equals the closing sales price on June 30, 2026 as assigned by the company.
• Transaction code: F (tax withholding).

Context
Withholding shares to cover taxes on vested awards is a common administrative action and does not represent a discretionary sale of shares by the insider. Such transactions generally do not signal a change in insider sentiment as they’re routine to satisfy tax obligations. Purchases by insiders tend to be more informative about bullish views than routine withholdings.