{"schema_version":"secwatch.filing_event.v1","accession":"0001175535-22-000069","form_type":"8-K","ticker":"WSR","cik":"0001175535","company_name":"Whitestone REIT","filed_at":"2022-04-22T23:59:59+00:00","discovered_at":"2026-05-14T18:03:59.943659+00:00","generated_at":"2026-06-26T05:16:52.214668+00:00","sec_items":["5.02","9.01"],"event_type":"leadership","sentiment":"negative","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"Whitestone REIT board member Mastandrea resigns over policy disagreements","bullets":["James Mastandrea resigned from the Board effective April 18, 2022; he was terminated as CEO with cause on Jan 18, 2022.","Resignation cited disagreement over operations, policies, governance, and practices of the Company.","Company asserts the resignation letter's allegations are inaccurate and without merit.","Board size reduced from six to five trustees following Mastandrea's resignation."],"urls":{"canonical":"https://secwatch.observer/filing/0001175535-22-000069","json":"https://secwatch.observer/filing/0001175535-22-000069.json","markdown":"https://secwatch.observer/filing/0001175535-22-000069.md","text":"https://secwatch.observer/filing/0001175535-22-000069.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1175535/000117553522000069/0001175535-22-000069-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1175535/000117553522000069/wsr-20220418.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-26T05:16:52.214668+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[{"claim_id":"6a6756fb97","claim":"James Mastandrea resigned as Member of the Board of Trustees at Whitestone REIT.","evidence_excerpt":"On April 18, 2022, Whitestone REIT (the “Company”) received by email a resignation letter (the “Resignation Letter”) from James Mastandrea, a member of the Company’s Board of Trustees (“the Board”), pursuant to which Mr. Mastandrea resigned as a member of the Board, effective immediately.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1175535/000117553522000069/0001175535-22-000069-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"resigned"},{"label":"Role","value":"Member of the Board of Trustees"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}