Francis Tang is VP at DIODES INC /DEL/ (DIOD). They have made 54 open-market trades across 1 company since 2006, most recently 2026-05-29.
CIK 0001363562
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.
2 open-market purchases totalling $167K since 2006, against 52 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| DIOD | 71,438 | $5.9M |
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 | $112.04 | $1.7M | -1.4% | -2.8% | -16.4% |
| DIOD | SELL | 2026-05-26 | 2026-05-27 | $109.14 | $997K | -2.2% | -3.0% | -13.2% |
| DIOD | SELL | 2026-05-12 | 2026-05-13 | $108.00 | $393K | +6.2% | +6.8% | +1.2% |
| DIOD | BUY | 2022-04-14 | 2022-04-18 | $70.00 | $140K | +3.0% | -0.1% | -6.8% |
| DIOD | SELL | 2021-11-04 | 2021-11-05 | $103.59 | $2.1M | -0.9% | -2.0% | -18.3% |
| DIOD | SELL | 2021-08-27 | 2021-08-27 | $95.62 | $749K | -5.3% | -3.1% | +5.4% |
| DIOD | SELL | 2021-08-23 | 2021-08-25 | $92.74 | $1.0M | +2.4% | +1.2% | +15.0% |
| DIOD | SELL | 2021-03-22 | 2021-03-23 | $89.09 | $2.2M | +1.0% | -3.8% | -8.5% |
| DIOD | SELL | 2020-12-08 | 2020-12-09 | $71.02 | $964K | -1.2% | +13.7% | +19.8% |
| DIOD | SELL | 2020-11-30 | 2020-12-01 | $67.00 | $121K | -2.1% | +2.0% | +18.5% |
| DIOD | SELL | 2020-11-24 | 2020-11-25 | $66.31 | $240K | +9.3% | +4.7% | +21.8% |
| DIOD | SELL | 2020-11-16 | 2020-11-18 | $65.00 | $160K | +11.4% | +8.4% | +31.1% |
| DIOD | SELL | 2020-10-08 | 2020-10-09 | $61.50 | $317K | -3.3% | -0.4% | +24.1% |
| DIOD | SELL | 2020-09-29 | 2020-10-01 | $56.72 | $1.2M | +10.1% | +2.1% | +22.2% |
| DIOD | SELL | 2020-08-11 | 2020-08-14 | $52.71 | $277K | -2.5% | -6.1% | +20.3% |
| DIOD | SELL | 2020-07-02 | 2020-07-06 | $48.22 | $18K | +3.0% | +4.4% | +18.7% |
| DIOD | SELL | 2020-05-26 | 2020-05-28 | $50.64 | $839K | +10.8% | +3.9% | +6.6% |
| DIOD | SELL | 2020-04-29 | 2020-05-01 | $52.63 | $632K | -9.3% | +3.5% | +10.7% |
| DIOD | SELL | 2019-12-11 | 2019-12-13 | $47.71 | $1.3M | +6.8% | +15.0% | -34.2% |
| DIOD | SELL | 2019-12-11 | 2019-12-13 | $47.65 | $851K | +6.8% | +15.0% | -34.2% |
| DIOD | SELL | 2019-11-27 | 2019-12-02 | $46.75 | $250K | +10.1% | +25.5% | -1.0% |
| DIOD | SELL | 2019-11-15 | 2019-11-19 | $46.54 | $255K | +3.0% | +16.1% | +9.8% |
| DIOD | SELL | 2019-11-12 | 2019-11-14 | $46.50 | $114K | -0.4% | +10.2% | +12.9% |
| DIOD | SELL | 2019-11-07 | 2019-11-12 | $46.75 | $3K | -1.8% | +9.9% | +6.9% |
| DIOD | SELL | 2019-10-28 | 2019-10-30 | $44.93 | $846K | -2.9% | -2.5% | +16.9% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.