Mark P. Vergnano is President & VP at DUPONT E I DE NEMOURS & CO (DD). They have made 13 open-market trades across 3 companies since 2010, most recently 2025-03-12.
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.
3 open-market purchases totalling $4.7M since 2015, against 10 sales. Too few scored purchases to measure a record yet.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| WAT | BUY | 2023-02-28 | 2023-03-01 | $313.32 | $2.0M | -0.5% | +0.6% | -16.9% |
| CC | SELL | 2021-12-02 | 2021-12-03 | $29.92 | $6.0M | +9.5% | +14.2% | -10.5% |
| CC | SELL | 2021-08-27 | 2021-08-30 | $35.00 | $3.4M | -7.8% | -13.3% | -8.1% |
| CC | SELL | 2020-12-18 | 2020-12-21 | $27.28 | $8.4M | -9.6% | +3.3% | -1.9% |
| CC | SELL | 2020-01-23 | 2020-01-27 | $16.00 | $3.5M | -0.3% | +5.8% | -24.1% |
| CC | BUY | 2019-06-10 | 2019-06-11 | $23.17 | $2.0M | +4.8% | -19.2% | -33.2% |
| CC | SELL | 2018-05-08 | 2018-05-10 | $50.47 | $20.2M | +1.5% | +0.0% | -6.1% |
| CC | BUY | 2015-09-04 | 2015-09-08 | $9.25 | $672K | -36.5% | +5.4% | +5.4% |
| DD | SELL · 10b5-1 | 2014-06-02 | 2014-06-04 | $69.40 | $3.0M | -13.2% | -0.7% | -0.7% |
| DD | SELL | 2014-02-25 | 2014-02-27 | $65.17 | $4.3M | -13.2% | -0.7% | -0.7% |
| DD | SELL · 10b5-1 | 2013-07-01 | 2013-07-02 | $52.16 | $5.6M | -13.2% | -0.7% | -0.7% |
| DD | SELL · 10b5-1 | 2013-05-20 | 2013-05-21 | $56.00 | $2.7M | -13.2% | -0.7% | -0.7% |
| DD | SELL · 10b5-1 | 2013-02-01 | 2013-02-05 | $47.65 | $465K | -13.2% | -0.7% | -0.7% |
| DD | SELL · 10b5-1 | 2012-07-05 | 2012-07-09 | $49.56 | $694K | -13.2% | -0.7% | -0.7% |
| DD | SELL | 2011-11-11 | 2011-11-15 | $48.54 | $1.2M | -13.2% | -0.7% | -0.7% |
| DD | SELL | 2010-12-15 | 2010-12-16 | $49.37 | $1.3M | -13.2% | -0.7% | -0.7% |
| DD | SELL | 2010-10-29 | 2010-11-01 | $47.00 | $597K | -13.2% | -0.7% | -0.7% |
| DD | SELL | 2010-04-29 | 2010-04-30 | $40.02 | $1.0M | -13.2% | -0.7% | -0.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.