Gil van Bokkelen is Chairman at ATHERSYS, INC / NEW (ATHX). They have made 13 open-market trades across 1 company since 2007, most recently 2020-12-17.
CIK 0001402604
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.
13 open-market purchases totalling $178K since 2007, never a sale. Across 13 scored buys the stock is up 0.0% at ninety days, and 0.3 points behind the S&P over the same stretch.
13 scored purchases · one row per filing · discretionary only
| 7d | 30d | 90d | |
|---|---|---|---|
| Accuracy | 100% | 0% | 0% |
| Avg Move | +5.0% | +0.0% | +0.0% |
| Alpha | +10.8% | -0.3% | -0.3% |
| Scored | 13 | 13 | 13 |
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| ATHX | SELL · 10b5-1 | 2015-09-18 | 2015-09-21 | $1.36 | $13K | +5.0% | +0.0% | +0.0% |
| ATHX | SELL · 10b5-1 | 2015-03-18 | 2015-03-19 | $3.10 | $29K | +5.0% | +0.0% | +0.0% |
| ATHX | SELL · 10b5-1 | 2014-12-18 | 2014-12-19 | $1.29 | $12K | +5.0% | +0.0% | +0.0% |
| ATHX | SELL · 10b5-1 | 2014-09-18 | 2014-09-22 | $1.42 | $13K | +5.0% | +0.0% | +0.0% |
| ATHX | SELL · 10b5-1 | 2014-06-18 | 2014-06-19 | $1.64 | $16K | +5.0% | +0.0% | +0.0% |
| ATHX | SELL · 10b5-1 | 2014-06-18 | 2015-06-19 | $1.23 | $12K | +5.0% | +0.0% | +0.0% |
| ATHX | SELL · 10b5-1 | 2014-03-18 | 2014-03-20 | $3.54 | $34K | +5.0% | +0.0% | +0.0% |
| ATHX | SELL · 10b5-1 | 2013-12-18 | 2013-12-20 | $2.03 | $19K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2012-05-18 | 2012-05-22 | $1.35 | $27K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2011-08-16 | 2011-08-18 | $2.00 | $4K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2011-08-12 | 2011-08-16 | $2.03 | $9K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2011-03-31 | 2011-04-04 | $2.81 | $23K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2011-03-25 | 2011-03-29 | $2.50 | $25K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2010-03-16 | 2010-03-18 | $2.88 | $43K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2009-03-16 | 2009-03-18 | $0.67 | $7K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2008-12-16 | 2008-12-17 | $0.50 | $3K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2008-12-03 | 2008-12-03 | $0.35 | $4K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2008-12-02 | 2008-12-04 | $0.35 | $4K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2008-11-28 | 2008-12-02 | $0.44 | $10K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2008-11-24 | 2008-11-25 | $0.33 | $4K | +5.0% | +0.0% | +0.0% |
| ATHX | BUY | 2007-12-12 | 2007-12-13 | $5.00 | $15K | +5.0% | +0.0% | +0.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.