Christine J. Mastandrea is President & COO at Whitestone REIT (WSR). They have made 7 open-market trades across 1 company since 2014, most recently 2026-07-14.
CIK 0001603592
Unrated. We grade insiders only on stock they chose to buy on the open market. Grants, option exercises and vesting say nothing about timing, so they don't count — which is why someone can file often and still have no grade. It isn't a bad sign: unrated buys beat every graded tier below A.
7 open-market purchases totalling $137K since 2014, never a sale. Across 7 scored buys the stock is up 1.2% at ninety days, and 0.6 points ahead of the S&P over the same stretch.
7 scored purchases · one row per filing · discretionary only
| Ticker | Shares | Value |
|---|---|---|
| WSR | 718,873 | $13.7M |
Shares reported on the most recent Form 4, priced at the 2026-07-15 close.
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 0% | 0% | 29% |
| Avg Move | -7.0% | -1.9% | +1.2% |
| Alpha | -3.1% | -1.3% | +0.6% |
| Scored | 7 | 7 | 7 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| WSR | BUY | 2022-09-30 | 2022-10-04 | $8.56 | $4K | -5.7% | -0.8% | +8.7% |
| WSR | BUY | 2018-03-05 | 2018-03-05 | $10.65 | $27K | -1.8% | -2.7% | +13.3% |
| WSR | BUY | 2016-08-19 | 2016-08-22 | $14.56 | $29K | -2.2% | -5.4% | -8.7% |
| WSR | BUY | 2015-08-07 | 2015-08-10 | $12.95 | $26K | -9.8% | -1.2% | -1.2% |
| WSR | BUY | 2015-05-12 | 2015-05-14 | $14.32 | $14K | -9.8% | -1.2% | -1.2% |
| WSR | BUY | 2015-05-12 | 2015-05-13 | $14.17 | $21K | -9.8% | -1.2% | -1.2% |
| WSR | BUY | 2014-11-13 | 2014-11-13 | $15.09 | $15K | -9.8% | -1.2% | -1.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.