Welcome to our dedicated page for Whitestone SEC filings (Ticker: WSR), a comprehensive resource for investors and traders seeking official regulatory documents including 10-K annual reports, 10-Q quarterly earnings, 8-K material events, and insider trading forms.
Whitestone REIT filings document the regulatory record for a Maryland real estate investment trust with common shares listed on the NYSE and operations conducted through Whitestone REIT Operating Partnership, L.P. Its 8-K reports furnish operating results, quarterly supplemental financial packages, REIT performance measures, dividend declarations, and distribution policy changes.
The filing record also covers capital-structure and financing matters, including an unsecured credit facility, interest-rate swap arrangements, an at-the-market common share program under a shelf registration statement, and a common share repurchase authorization. Other disclosures address material definitive agreements, Regulation FD communications, shareholder solicitation and voting matters, governance topics, and exhibits tied to Whitestone’s open-air retail center portfolio.
Whitestone REIT reported an insider equity transaction involving its Chief Financial Officer. On 01/02/2026, the CFO received 38,314 restricted common shares at a stated price of $0, issued upon vesting of performance-based restricted stock units granted in 2023 under the company’s 2018 Long-Term Equity Incentive Ownership Plan. These units vested at 200% of target based on the company achieving a #1 peer group ranking for total shareholder return over the performance period from January 1, 2023 through December 31, 2025.
On the same date, 15,529 common shares were withheld by the company to cover tax withholding obligations tied to the vesting, using a per-share value of $13.89 based on the closing sales price on December 31, 2025. After these transactions, the CFO beneficially owned 228,170 common shares, held directly.
Whitestone REIT reported a change in holdings for its General Counsel & Secretary, Peter Tropoli. On 01/02/2026, he acquired 38,314 common shares at $0, representing restricted common shares issued upon vesting of performance-based restricted stock units granted in 2023 under the company’s 2018 Long-Term Equity Incentive Ownership Plan. These units vested at 200% of target based on Whitestone’s #1 peer group ranking for total shareholder return for the performance period from January 1, 2023 through December 31, 2025.
On the same date, 15,455 common shares were disposed of at a value of $13.89 per share, representing shares withheld by the company to satisfy tax withholding obligations related to the vesting. Following these transactions, Tropoli beneficially owns 170,335 common shares, held directly.
Whitestone REIT reported an equity award and related tax share withholding for its VP of Human Resources, Soklin Siv. On 01/02/2026, the officer acquired 24,084 restricted common shares at $0, issued upon vesting of performance-based restricted stock units granted in 2023 under the company’s 2018 Long-Term Equity Incentive Ownership Plan. These units vested at 200% of target based on the company’s #1 peer group ranking for total shareholder return for the performance period from January 1, 2023 through December 31, 2025.
Also on 01/02/2026, 6,521 common shares were disposed of and withheld by Whitestone REIT to satisfy tax withholding obligations tied to the vesting, using a per-share value of $13.89 based on the closing sales price on December 31, 2025. After these transactions, the officer directly beneficially owned 98,744 common shares of Whitestone REIT.
Pillarstone Capital REIT and James C. Mastandrea have amended their proxy materials to restate a press release about Whitestone REIT. Mastandrea, a significant Whitestone shareholder since its 2010 IPO, states that he plans to nominate a new slate of independent trustees at Whitestone’s 2026 annual meeting under the SEC’s universal proxy rules. He argues that Whitestone’s shares have delivered subpar returns, citing what he views as strategic missteps, governance and capital-allocation concerns, and a continued discount to estimated net asset value despite properties in Texas and Arizona.
Mastandrea says his six planned trustee nominees would reset strategy, oversee leadership, and consider options such as a negotiated sale or liquidation of properties. As of the filing, he beneficially owns 1,149,604 Whitestone common shares and Chad D. Champion owns 22,439.33 shares. The group plans to file full proxy materials and urges Whitestone shareholders to review the company’s record since 2021.
Whitestone REIT is the target of an activist campaign led by major shareholder James C. Mastandrea. He has filed amended proxy materials stating that he plans to nominate six independent trustee candidates at the 2026 annual meeting to replace the current Board of Trustees, using the SEC’s universal proxy rules.
Mastandrea, a significant shareholder since the company’s 2010 IPO, argues that Whitestone’s share performance has been weak in recent years and that the stock trades at a persistent discount to estimated net asset value despite owning shopping centers in high‑growth Texas and Arizona markets. He attributes this to what he views as strategic and governance shortcomings by the current board and management.
He says a refreshed board could seek to narrow the valuation discount through improved operations or potential strategic alternatives, including a negotiated sale or property liquidation. Mastandrea beneficially owns 1,149,604 common shares, while fellow participant Chad D. Champion beneficially owns 22,439.33 common shares.
Whitestone REIT shareholder James C. Mastandrea, a significant owner since the 2010 IPO, plans to solicit proxies to elect his own slate of trustees at the Company’s 2026 annual meeting. He intends to nominate six independent candidates with commercial real estate, capital markets, and governance backgrounds to replace the current Board of Trustees.
Mastandrea states that Whitestone’s shares have delivered what he views as subpar returns and notes that the operating portfolio declined from 53 properties at December 31, 2021 to 50 at September 30, 2025, with gross leasable area moving from about 4.9 million to 4.8 million square feet over that period. He attributes what he describes as a valuation discount to strategic and capital allocation decisions and outlines potential paths such as a negotiated sale or property liquidation as options he believes could help close the gap. Mastandrea reports beneficial ownership of 1,149,604 common shares, with an additional 22,439.33 common shares held by participant Chad D. Champion.
James C. Mastandrea, a significant Whitestone REIT shareholder, plans to run a competing slate of six independent trustee nominees at the Company’s 2026 annual meeting under the SEC’s universal proxy rules. He states that Whitestone’s shares have delivered subpar returns, trade at a discount to estimated net asset value, and that recent dividends and buybacks mask what he characterizes as operational stagnation and capital‑allocation issues.
Mastandrea, who beneficially owns 1,149,604 common shares, and participant Chad D. Champion, who beneficially owns 22,439.33 common shares, intend to solicit votes via a separate proxy statement. He outlines potential paths to improve value, including either a negotiated sale to interested investors or a liquidation and sale of properties, and suggests hiring an independent investment bank to evaluate strategic alternatives.
Whitestone REIT reported an insider equity award for director Donald A. Miller, CFA. On 12/24/2025, he acquired 11,986 common shares of Whitestone REIT at $13.70 per share. The filing states this represents a grant of common shares under the company’s 2018 Long-Term Equity Incentive Ownership Plan. Following this grant, Miller beneficially owns 33,694 common shares, held directly.
Whitestone REIT reported an equity grant to a director. On 12/24/2025, the reporting person received 12,286 common shares of Whitestone REIT at a stated price of $13.70 per share under the company’s 2018 Long-Term Equity Incentive Ownership Plan. After this grant, the director beneficially owned 15,789 common shares held directly.
Whitestone REIT director Julia B. Buthman reported receiving an equity grant of 12,660 common shares on 12/24/2025. The shares were acquired at a price of $13.70 per share and were awarded under the company’s 2018 Long-Term Equity Incentive Ownership Plan. Following this grant, she beneficially owns 31,577 common shares, held directly.