Charles W. Hull is CTO & VP at 3D SYSTEMS CORP (DDD). They have made 13 open-market trades across 2 companies since 2006, most recently 2026-09-08.
CIK 0001105964
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.
0 open-market purchases totalling $7K since 2012, against 13 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| DDD | SELL | 2024-12-17 | 2024-12-18 | $3.86 | $895K | -15.9% | -21.0% | -32.1% |
| DDD | SELL | 2022-06-08 | 2022-06-10 | $10.95 | $578K | +8.4% | +0.3% | +1.6% |
| DDD | SELL | 2022-03-07 | 2022-03-09 | $14.78 | $875K | +7.1% | +0.3% | -26.9% |
| DDD | SELL | 2019-11-05 | 2019-11-07 | $9.73 | $816K | -9.4% | -10.0% | +29.1% |
| DDD | SELL | 2015-03-02 | 2015-03-02 | $30.11 | $1.2M | -11.7% | +16.1% | +16.1% |
| DDD | SELL | 2014-11-19 | 2014-11-19 | $36.05 | $361K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2014-10-20 | 2014-10-22 | $41.90 | $314K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2014-09-15 | 2014-09-16 | $49.65 | $372K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2014-08-18 | 2014-08-19 | $49.07 | $368K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2014-07-21 | 2014-07-22 | $56.54 | $424K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2014-06-16 | 2014-06-17 | $50.41 | $378K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2014-05-19 | 2014-05-20 | $48.78 | $366K | -11.7% | +16.1% | +16.1% |
| DDD | SELL | 2013-03-13 | 2013-03-13 | $32.31 | $3.2M | -11.7% | +16.1% | +16.1% |
| DDD | SELL | 2013-03-12 | 2013-03-13 | $32.64 | $13.1M | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2013-02-11 | 2013-02-12 | $67.29 | $135K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2013-02-11 | 2013-02-12 | $66.72 | $267K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2013-01-10 | 2013-01-11 | $58.58 | $208K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2013-01-10 | 2013-01-11 | $59.64 | $146K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2012-12-10 | 2012-12-11 | $46.16 | $277K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2012-11-12 | 2012-11-13 | $45.64 | $123K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2012-11-12 | 2012-11-13 | $42.79 | $141K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2012-10-10 | 2012-10-11 | $34.34 | $10K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2012-10-10 | 2012-10-11 | $34.12 | $188K | -11.7% | +16.1% | +16.1% |
| DDD | BUY | 2012-10-10 | 2012-10-11 | $34.11 | $7K | -11.7% | +16.1% | +16.1% |
| DDD | SELL · 10b5-1 | 2012-09-10 | 2012-09-11 | $39.30 | $64K | -11.7% | +16.1% | +16.1% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.