David D. Harrison is President & CFO at PENTAIR INC (PNR). They have made 14 open-market trades across 3 companies since 2006, most recently 2026-07-31.
CIK 0001189046
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.
4 open-market purchases totalling $191K since 2008, against 10 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| PNR | 110,575 | $5.9M |
| NOV | 126,763 | $2.4M |
| NAV | 3,333 | $148K |
| Total | $8.5M |
Shares reported on the most recent Form 4, priced at the 2026-07-31 close.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| NOV | SELL | 2026-07-31 | 2026-07-31 | $19.21 | $184K | +9.8% | +11.8% | — |
| NOV | SELL | 2024-11-20 | 2024-11-21 | $16.10 | $29K | -3.5% | -12.8% | -6.9% |
| NOV | SELL | 2022-09-01 | 2022-09-01 | $17.01 | $106K | +2.7% | -1.8% | +28.6% |
| NOV | SELL | 2015-11-09 | 2015-11-10 | $38.79 | $634K | -13.2% | +3.3% | -15.2% |
| NOV | SELL | 2014-12-29 | 2014-12-30 | $66.99 | $368K | -13.2% | +3.3% | +3.3% |
| NOV | BUY | 2013-04-30 | 2013-04-30 | $65.12 | $72K | -13.2% | +3.3% | +3.3% |
| NAV | BUY | 2011-06-29 | 2011-06-29 | $54.51 | $55K | -23.6% | +10.2% | +10.2% |
| NOV | SELL | 2011-03-03 | 2011-03-04 | $81.32 | $1.2M | -13.2% | +3.3% | +3.3% |
| NAV | BUY | 2009-12-29 | 2009-12-31 | $39.78 | $40K | -23.6% | +10.2% | +10.2% |
| NOV | BUY | 2008-10-24 | 2008-10-27 | $24.48 | $24K | -13.2% | +3.3% | +3.3% |
| NOV | SELL | 2007-03-16 | 2007-03-16 | $73.41 | $477K | -13.2% | +3.3% | +3.3% |
| PNR | SELL | 2006-11-16 | 2006-11-17 | $33.17 | $663K | -7.3% | +1.3% | +1.3% |
| PNR | SELL | 2006-05-01 | 2006-05-03 | $38.03 | $761K | -7.3% | +1.3% | +1.3% |
| PNR | SELL | 2006-02-08 | 2006-02-08 | $38.14 | $759K | -7.3% | +1.3% | +1.3% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.