---
schema_version: "secwatch.filing_event.v1"
accession: "0001175535-22-000030"
form_type: "8-K"
ticker: "WSR"
cik: "0001175535"
company_name: "Whitestone REIT"
filed_at: "2022-02-14T23:59:59+00:00"
generated_at: "2026-06-27T08:18:24.603193+00:00"
event_type: "leadership"
sentiment: "neutral"
materiality_score: 0.5
calibrated_materiality_score: 0.5
confidence: "high"
source: SEC EDGAR
---

# Whitestone REIT appoints Christine Mastandrea as COO; COO Dee and EVP Johnson depart

## Summary
- Christine Mastandrea promoted from EVP of Corporate Strategy to COO, effective Feb 9, 2022.
- John Dee (COO) and Bradford Johnson (EVP Acquisitions) left the company effective Feb 9, 2022.
- Peter Tropoli appointed Corporate Secretary in addition to General Counsel; Michelle Siv promoted to VP HR.
- David Mordy hired as Director of IR effective Feb 14; Michael Ly hired as Controller effective Feb 21.
- Compensation terms for new roles not yet determined; will amend 8-K within 4 business days.

## SEC filing metadata
- accession: 0001175535-22-000030
- form_type: 8-K
- ticker: WSR
- cik: 0001175535
- company_name: Whitestone REIT
- filed_at: 2022-02-14T23:59:59+00:00
- event_type: leadership
- sentiment: neutral
- materiality_score: 0.5
- calibrated_materiality_score: 0.5
- confidence: high
- sec_items: 5.02, 7.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1175535/000117553522000030/0001175535-22-000030-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1175535/000117553522000030/wsr-20220209.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001175535-22-000030
- JSON: https://secwatch.observer/filing/0001175535-22-000030.json
- Plain text: https://secwatch.observer/filing/0001175535-22-000030.txt

## Key facts
- Executive change
  Bradford Johnson departed as Executive Vice President of Acquisitions and Asset Management at Whitestone REIT.
  - Action: employment ended
  - Role: Executive Vice President of Acquisitions and Asset Management
  source text: Bradford Johnson’s employment with Whitestone REIT (the "Company") ended effective February 9, 2022 (the “Termination Date”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1175535/000117553522000030/0001175535-22-000030-index.htm
- Executive change
  Peter Tropoli was appointed as Corporate Secretary at Whitestone REIT.
  - Action: appointed
  - Role: Corporate Secretary
  source text: On February 9, 2022, Peter Tropoli, the current General Counsel of the Company, was appointed as the Company’s Corporate Secretary, in addition to his duties as General Counsel.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1175535/000117553522000030/0001175535-22-000030-index.htm
- Executive change
  Christine Mastandrea was appointed as Chief Operating Officer at Whitestone REIT.
  - Action: appointed
  - Role: Chief Operating Officer
  source text: On February 9, 2022, Christine Mastandrea, the current Executive Vice President of Corporate Strategy of the Company, was appointed as the Company’s Chief Operating Officer.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1175535/000117553522000030/0001175535-22-000030-index.htm
- Executive change
  Michelle Siv was appointed as Vice President of Human Resources at Whitestone REIT.
  - Action: appointed
  - Role: Vice President of Human Resources
  source text: On February 9, 2022, Michelle Siv, the current Director of Human Resources, was appointed as the Company’s Vice President of Human Resources.
  evidence_url: https://www.sec.gov/Archives/edgar/data/1175535/000117553522000030/0001175535-22-000030-index.htm
- Executive change
  John Dee departed as Chief Operating Officer at Whitestone REIT.
  - Action: employment ended
  - Role: Chief Operating Officer
  source text: John Dee’s employment with Whitestone REIT (the "Company") ended effective February 9, 2022 (the “Termination Date”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1175535/000117553522000030/0001175535-22-000030-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.