Ling Zang is Director at GENTEX CORP (GNTX). They have made 1 open-market trade across 1 company since 2021, most recently 2026-05-21.
CIK 0001864245
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 1 sale. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| GNTX | 35,599 | $748K |
Shares reported on the most recent Form 4, priced at the 2026-05-22 close.
| Ticker | Type | Traded | Filed | Price | Value | 7d Stock | 30d Stock | 90d Stock |
|---|---|---|---|---|---|---|---|---|
| GNTX | SELL | 2021-06-08 | 2021-06-09 | $34.34 | $687K | -6.5% | -5.0% | -11.2% |
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.