Aehr Test Systems
Builds semiconductor test and burn-in systems for wafers, die, modules, and packaged devices.
$81.30
After-hours close+0.52 (+0.64%)
At close$80.78(−10.70%)
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Breakdown13F · Form 4
Institutions 82.01%26.75M sharesInsiders 4.91%1.60M sharesOther 13.08%4.27M shares
Shares outstanding 32.62M · Float 30.80M · 94.4% free float
Institutions13F, as of Jun 30, 2026
291 holders · 26.75M shares · 107 new positions · 183 increased · 72 reduced · 32 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| BlackRock, Inc. | 2.66M | 8.15% | +372.6K | Aug 7, 2026 |
| Vanguard Capital Management LLC | 1.32M | 4.05% | +38.5K | Aug 13, 2026 |
| D. E. Shaw & Co., Inc. | 1.18M | 3.61% | +835.8K | Aug 14, 2026 |
| Two Sigma Investments, LP | 1.16M | 3.57% | +950.2K | Aug 14, 2026 |
| FMR LLC | 1.01M | 3.09% | −1.14M | Aug 13, 2026 |
| Vanguard Portfolio Management LLC | 966.7K | 2.96% | +48.8K | Aug 13, 2026 |
| Geode Capital Management, LLC | 875.5K | 2.68% | +149.8K | Aug 12, 2026 |
| Goldman Sachs Group Inc | 810.0K | 2.48% | −452.0K | Aug 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| FMR LLC | 7.00% | 2.14M | 13G | May 6, 2026 ↗ |
| AWM Investment Company, Inc. | 5.30% | 1.59M | 13G | May 7, 2025 ↗ |
| Jane Street Group, LLC | 5.10% | 1.65M | 13G | Jul 29, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| Rhea J. Posedel | director: Director | 429.1K | 1.32% | Aug 14, 2026 |
| Gayn Erickson | director, officer: President and CEO | 355.2K | 1.09% | Aug 13, 2026 |
| Donald P. Ii Richmond | officer: CTO | 186.6K | 0.57% | Jul 27, 2026 |
| Vernon Rogers | officer: Exec VP of Sales & Mktg. | 186.2K | 0.57% | Aug 18, 2026 |
| Howard T. Slayen | director: Director | 140.7K | 0.43% | Aug 14, 2026 |
| Chris Siu | officer: CFO | 83.5K | 0.26% | Jul 13, 2026 |
| Geoffrey Gates Scott | director: Director | 61.6K | 0.19% | Aug 13, 2026 |
| Adil Engineer | officer: Chief Operating Officer | 46.5K | 0.14% | Aug 14, 2026 |
| Alberto Salamone | officer: EVP, PPBI BUSINESS | 42.0K | 0.13% | Aug 14, 2026 |
| Alistair N. Sporck | officer: VP Contactor Business Unit | 27.7K | 0.08% | Aug 11, 2026 |
2 ten-percent owners hold 2.7K shares by Form 4, outside the officers-and-directors figure above · 10 people have not refiled in the last 18 months (1.88M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 17, 2026 | Vernon Rogersofficer: Exec VP of Sales & Mktg. | Sale | 3,994 | $143.77 | 186,232 |
| Aug 14, 2026 | Vernon Rogersofficer: Exec VP of Sales & Mktg. | Sale · 2 lots | 2,000 | $136.50 | 190,226 |
| Aug 14, 2026 | Howard T. Slayendirector: Director | Sale | 5,700 | $133.03 | 140,667 |
| Aug 14, 2026 | Rhea J. Posedeldirector: Director | Sale | 5,973 | $140.00 | 381,989 |
| Aug 13, 2026 | Alberto Salamoneofficer: EVP, PPBI BUSINESS | Sale · 2 lots | 9,672 | $127.72 | 41,962 |
| Aug 12, 2026 | Gayn Ericksondirector, officer: President and CEO | Sale · 2 lots | 40,000 | $130.84 | 157,723 |
| Aug 12, 2026 | Rhea J. Posedeldirector: Director | Sale | 8,413 | $130.00 | 387,962 |
| Aug 12, 2026 | Laura Oliphantdirector: Director | Sale | 1,717 | $133.00 | 16,100 |
| Aug 12, 2026 | Adil Engineerofficer: Chief Operating Officer | Sale · 2 lots | 15,000 | $131.02 | 46,977 |
| Aug 12, 2026 | Geoffrey Gates Scottdirector: Director | Sale | 20,000 | $131.51 | 10,000 |
CongressHouse and Senate disclosures
Not reported.