Richard Dallas White is Secretary at DIODES INC /DEL/ (DIOD). They have made 44 open-market trades across 1 company since 2008, most recently 2026-05-29.
CIK 0001368889
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.
1 open-market purchase totalling $19K since 2008, against 43 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| DIOD | 8,071 | $669K |
Shares reported on the most recent Form 4, priced at the 2026-06-01 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 |
|---|---|---|---|---|---|---|---|---|
| DIOD | SELL | 2026-05-29 | 2026-06-01 | $106.17 | $319K | -1.4% | -2.8% | -16.4% |
| DIOD | SELL | 2023-05-30 | 2023-05-31 | $96.37 | $193K | +3.6% | +2.4% | -9.6% |
| DIOD | SELL | 2022-02-15 | 2022-02-16 | $89.39 | $447K | -8.0% | -1.0% | -16.2% |
| DIOD | SELL | 2021-03-02 | 2021-03-03 | $78.20 | $4.2M | +9.1% | +9.2% | -1.5% |
| DIOD | SELL | 2021-02-23 | 2021-02-24 | $79.80 | $793K | -5.9% | -0.2% | -7.3% |
| DIOD | SELL | 2021-02-17 | 2021-02-18 | $77.01 | $385K | -3.7% | +12.3% | -10.3% |
| DIOD | SELL | 2020-10-01 | 2020-10-01 | $57.00 | $200K | +10.1% | +2.1% | +22.2% |
| DIOD | SELL | 2020-09-28 | 2020-09-30 | $54.00 | $1.4M | +11.3% | +1.5% | +18.5% |
| DIOD | SELL | 2020-09-23 | 2020-09-24 | $51.00 | $255K | +19.3% | +21.1% | +35.6% |
| DIOD | SELL | 2020-09-16 | 2020-09-18 | $50.00 | $250K | +17.2% | +29.1% | +42.4% |
| DIOD | SELL | 2020-08-31 | 2020-09-01 | $49.12 | $49K | -2.1% | +17.9% | +35.9% |
| DIOD | SELL | 2020-06-05 | 2020-06-09 | $54.00 | $270K | -6.4% | -5.9% | -12.3% |
| DIOD | SELL | 2020-05-27 | 2020-05-28 | $50.50 | $328K | +10.8% | +3.9% | +6.6% |
| DIOD | SELL | 2020-04-28 | 2020-04-30 | $51.50 | $1.0M | -10.5% | -1.7% | +4.2% |
| DIOD | SELL | 2020-02-24 | 2020-02-25 | $44.76 | $444K | -4.9% | -9.9% | +8.6% |
| DIOD | SELL | 2020-02-20 | 2020-02-21 | $48.44 | $3.2M | +4.0% | -25.3% | +4.4% |
| DIOD | SELL | 2020-02-18 | 2020-02-19 | $48.14 | $241K | -8.6% | -33.1% | -7.2% |
| DIOD | SELL | 2019-12-11 | 2019-12-13 | $48.32 | $1.4M | +6.8% | +15.0% | -34.2% |
| DIOD | SELL | 2019-12-11 | 2019-12-13 | $48.56 | $3.5M | +6.8% | +15.0% | -34.2% |
| DIOD | SELL | 2019-11-26 | 2019-11-26 | $46.28 | $1.2M | +1.5% | +16.9% | -2.3% |
| DIOD | SELL | 2019-11-25 | 2019-11-26 | $46.32 | $2.8M | +1.5% | +16.9% | -2.3% |
| DIOD | SELL | 2019-11-25 | 2019-11-26 | $46.56 | $221K | +1.5% | +16.9% | -2.3% |
| DIOD | SELL | 2019-05-29 | 2019-05-30 | $31.73 | $412K | +8.5% | +17.6% | +15.2% |
| DIOD | SELL | 2019-02-22 | 2019-02-25 | $40.89 | $406K | -13.2% | -20.0% | -25.8% |
| DIOD | SELL | 2019-02-15 | 2019-02-19 | $42.06 | $759K | -1.0% | -7.3% | -18.0% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.