Aehr Test Systems
A maker of the machines that stress-test semiconductors before they ship, Aehr Test Systems builds wafer-level (FOX) and package-level (Sonoma, Tahoe, Echo) test and burn-in systems. Its tools screen chips at high voltage and temperature to weed out early failures, serving AI processors, electric-vehicle power chips, and data-center optics. Founded in 1977 by Rhea Posedel in Fremont, California, the company holds over a hundred patents on its WaferPak and DiePak designs.
Granted 62.3K · Sold 118.5K
Granted 186.1K · Sold 158.8K
Granted 23.0K · Sold 100.0K
Granted 30.5K · Sold 34.0K
Granted 23.0K · Bought 20.7K · Sold 37.8K
Granted 83.2K · Sold 2.4K
Granted 145.0K · Sold 31.4K
Granted 26.7K · Sold 14.2K
Granted 24.7K · Sold 35.0K
Granted 53.6K · Sold 16.8K
Granted 12.2K · Bought 8.0K
Granted 38.0K · Sold 37.5K
Granted 23.0K · Sold 18.9K
Sold 5.4K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Posedel Rhea JDirector, Director · 17 transactions | — | 901.0K | 62.3K | — | 118.5K |
| Erickson GaynPresident and CEO, Director · 57 transactions | — | 772.1K | 186.1K | — | 158.8K |
| Scott Geoffrey GatesDirector · 10 transactions | -45.6% | 299.3K | 23.0K | — | 100.0K |
| Richmond Donald P. IICTO · 55 transactions | +30.8% | 181.4K | 30.5K | — | 34.0K |
| Slayen Howard TDirector · 14 transactions | -8.9% | 169.7K | 23.0K | 20.7K | 37.8K |
| Siu ChrisCFO · 35 transactions | — | 151.6K | 83.2K | — | 2.4K |
| Rogers VernonExec VP of Sales & Mktg. · 60 transactions | +305% | 147.6K | 145.0K | — | 31.4K |
| Sporck Alistair NVP Contactor Business Unit · 49 transactions | — | 57.4K | 26.7K | — | 14.2K |
| Salamone AlbertoEVP, PPBI BUSINESS · 19 transactions | — | 47.8K | 24.7K | — | 35.0K |
| Engineer AdilChief Operating Officer · 37 transactions | +3309.3% | 40.9K | 53.6K | — | 16.8K |
| Ray-Chaudhuri Avijit K.Executive VP of R&D · 11 transactions | — | 28.3Kas of Oct 2024 | 12.2K | 8.0K | — |
| Danesh FaribaDirector, Director · 11 transactions | +66.9% | 21.1K | 38.0K | — | 37.5K |
| Oliphant LauraDirector, Director · 15 transactions | +22.1% | 16.7K | 23.0K | — | 18.9K |
| Wimmers DidierExecutive VP of R&D · 8 transactions | — | 10.3K | — | — | 5.4K |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over the last 3 years: -582.0K shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.