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 371.7K · Bought 40.1K · Sold 935.2K
Granted 1.59M · Bought 244.3K · Sold 1.30M
Granted 231.3K · Bought 533.8K · Sold 15.0K
Granted 25.2K · Bought 36.7K · Sold 673.7K
Granted 76.9K · Bought 455.7K · Sold 52.0K
Granted 65.9K · Sold 512.7K
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Granted 93.0K · Bought 14.1K · Sold 70.8K
Granted 126.8K · Bought 14.1K · Sold 170.2K
Granted 461.6K · Bought 20.0K · Sold 363.2K
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Granted 12.2K · Bought 8.0K
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Granted 7.5K · Bought 411
Bought 10.0K
Granted 27.9K · Bought 6.2K · Sold 37.6K
Sold 5.4K
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Granted 66.3K · Sold 49.9K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Posedel Rhea JDirector, Director · 142 transactions | — | 901.0K | 371.7K | 40.1K | 935.2K |
| Erickson GaynPresident and CEO, Director · 211 transactions | — | 772.1K | 1.59M | 244.3K | 1.30M |
| Anderson Robert RDirector · 76 transactions | — | 762.1Kas of Oct 2017 | 231.3K | 533.8K | 15.0K |
| Schneider John M.Director · 39 transactions | — | 577.1Kas of Jul 2020 | 25.2K | 36.7K | 673.7K |
| Patel MukeshDirector · 85 transactions | — | 507.1Kas of Nov 2014 | 76.9K | 455.7K | 52.0K |
| Scott Geoffrey GatesDirector · 39 transactions | — | 299.3K | 65.9K | — | 512.7K |
| Richmond Donald P. IICTO · 106 transactions | — | 181.4K | 280.2K | — | 160.5K |
| Slayen Howard TDirector · 76 transactions | — | 169.7K | 367.6K | 75.4K | 194.3K |
| Rosati Mario MDirector · 49 transactions | — | 162.8Kas of Jun 2023 | 288.0K | — | 443.1K |
| Siu ChrisCFO · 35 transactions | — | 151.6K | 83.2K | — | 2.4K |
| Rogers VernonExec VP of Sales & Mktg. · 94 transactions | — | 147.6K | 375.3K | — | 180.9K |
| Spink Kenneth B.VP of Finance and CFO · 59 transactions | — | 146.4Kas of Jul 2023 | 382.1K | — | 256.5K |
| Elder William W RDirector · 128 transactions | — | 143.5Kas of Nov 2017 | 198.1K | 86.0K | 170.5K |
| Larson Gary LVP OF FINANCE & CFO · 70 transactions | — | 142.8Kas of Aug 2015 | 93.0K | 14.1K | 70.8K |
| Buck Carl NFormer VP of Marketing · 181 transactions | — | 99.6Kas of Apr 2019 | 126.8K | 14.1K | 170.2K |
| Hendrickson David SFormer CTO · 159 transactions | — | 84.8Kas of Jul 2023 | 461.6K | 20.0K | 363.2K |
| 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 · 19 transactions | — | 21.1K | 56.8K | — | 43.7K |
| Oliphant LauraDirector, Director · 41 transactions | — | 16.7K | 121.0K | — | 104.3K |
| Allison Mark D.VP OF WORLDWIDE SALES · 5 transactions | — | 13.9Kas of Jul 2017 | 7.5K | 411 | — |
| Anderson LarryVP OF WORLDWIDE SALES · 2 transactions | — | 13.0Kas of Apr 2013 | — | 10.0K | — |
| Fucci DavidFormer VP of Operations · 21 transactions | — | 10.5Kas of Sep 2020 | 27.9K | 6.2K | 37.6K |
| Wimmers DidierExecutive VP of R&D · 8 transactions | — | 10.3K | — | — | 5.4K |
| Perkins Gregory MVP, WORLD WIDE SALES & SERVICE · 57 transactions | — | 10.0Kas of Apr 2008 | 63.8K | — | 67.4K |
| Bustos JoelVP - OPERATIONS · 2 transactions | — | 768as of Oct 2008 | — | — | — |
| Sano KunioPresident of Aehr Test Japan · 90 transactions | — | 0as of Feb 2020 | 150.8K | — | 150.8K |
| Brannan Michael A.FORMER VP OF OPERATIONS · 18 transactions | — | 0as of Jan 2022 | 66.3K | — | 49.9K |
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 all recorded history: -4.48M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.