Robert Porterfield is President & VP at NATIONAL INSTRUMENTS CORP /DE/ (NATI). They have made 7 open-market trades across 1 company since 2006, most recently 2011-08-01.
CIK 0001307795
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, against 7 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| NATI | 77,061 | $4.6M |
Shares reported on the most recent Form 4, priced at the 2011-11-09 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| NATI | SELL | 2011-02-28 | 2011-03-02 | $31.18 | $265K | -2.4% | -0.7% | -0.7% |
| NATI | SELL | 2010-11-02 | 2010-11-04 | $34.75 | $313K | -2.4% | -0.7% | -0.7% |
| NATI | SELL | 2008-08-08 | 2008-08-12 | $35.15 | $237K | -2.4% | -0.7% | -0.7% |
| NATI | SELL | 2007-11-29 | 2007-11-29 | $33.14 | $265K | -2.4% | -0.7% | -0.7% |
| NATI | SELL | 2007-08-30 | 2007-08-31 | $30.85 | $309K | -2.4% | -0.7% | -0.7% |
| NATI | SELL | 2007-02-02 | 2007-02-06 | $97.72 | $770K | -2.4% | -0.7% | -0.7% |
| NATI | SELL | 2006-01-30 | 2006-02-01 | $35.00 | $285K | -2.4% | -0.7% | -0.7% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.