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 114.5K · Sold 581.5K
Granted 723.2K · Sold 944.4K
Granted 37.2K · Sold 469.7K
Granted 216.3K · Sold 160.5K
Granted 173.5K · Bought 20.7K · Sold 194.3K
Granted 122.7K · Sold 361.0K
Granted 83.2K · Sold 2.4K
Granted 321.3K · Sold 180.9K
Granted 266.7K · Sold 250.0K
Granted 134.7K · Sold 114.5K
Granted 26.7K · Sold 16.1K
Granted 24.7K · Sold 35.0K
Granted 53.6K · Sold 16.8K
Granted 12.2K · Bought 8.0K
Granted 52.2K · Sold 43.7K
Granted 47.2K · Sold 60.8K
Sold 5.4K
Granted 34.4K · Sold 47.4K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Posedel Rhea JDirector, Director · 41 transactions | — | 901.0K | 114.5K | — | 581.5K |
| Erickson GaynPresident and CEO, Director · 105 transactions | — | 772.1K | 723.2K | — | 944.4K |
| Scott Geoffrey GatesDirector · 32 transactions | — | 299.3K | 37.2K | — | 469.7K |
| Richmond Donald P. IICTO · 93 transactions | +46% | 181.4K | 216.3K | — | 160.5K |
| Slayen Howard TDirector · 55 transactions | -33.3% | 169.7K | 173.5K | 20.7K | 194.3K |
| Rosati Mario MDirector · 29 transactions | — | 162.8Kas of Jun 2023 | 122.7K | — | 361.0K |
| Siu ChrisCFO · 35 transactions | — | 151.6K | 83.2K | — | 2.4K |
| Rogers VernonExec VP of Sales & Mktg. · 87 transactions | +213.9% | 147.6K | 321.3K | — | 180.9K |
| Spink Kenneth B.VP of Finance and CFO · 37 transactions | — | 146.4Kas of Jul 2023 | 266.7K | — | 250.0K |
| Hendrickson David SFormer CTO · 41 transactions | -16% | 84.8Kas of Jul 2023 | 134.7K | — | 114.5K |
| Sporck Alistair NVP Contactor Business Unit · 58 transactions | — | 57.4K | 26.7K | — | 16.1K |
| Salamone AlbertoEVP, PPBI BUSINESS · 19 transactions | — | 47.8K | 24.7K | — | 35.0K |
| Engineer AdilChief Operating Officer · 38 transactions | — | 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 · 18 transactions | — | 21.1K | 52.2K | — | 43.7K |
| Oliphant LauraDirector, Director · 30 transactions | -65.1% | 16.7K | 47.2K | — | 60.8K |
| Wimmers DidierExecutive VP of R&D · 8 transactions | — | 10.3K | — | — | 5.4K |
| Brannan Michael A.FORMER VP OF OPERATIONS · 11 transactions | -100% | 0as of Jan 2022 | 34.4K | — | 47.4K |
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 5 years: -3.46M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.