Chris Siu is CFO at AEHR TEST SYSTEMS (AEHR). They have made 4 open-market trades across 3 companies since 2007, most recently 2026-10-12.
CIK 0001389044
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 $7K since 2007, against 3 sales. Too few scored purchases to measure a record yet.
| Ticker | Shares | Value |
|---|---|---|
| AEHR | 74,983 | $4.5M |
| UCTT | 44,092 | $2.2M |
| TRID | 23,311 | — |
| Total | $6.8M |
Shares reported on the most recent Form 4, priced at the 2026-10-13 close. 1 holding could not be priced and is excluded from the total.
Counted per filing, not per execution lot — a purchase filled in several tranches is one decision.
Grouped by shared companies and similar filing behaviour. This is a similarity measure, not a ranking or a performance signal.