Aehr Test Systems
AEHR- Exchange
- Nasdaq
- Industry
- Instruments For Meas & Testing of Electricity & Elec Signals
- SEC CIK
- 0001040470
In the last 90 days, Aehr Test Systems insiders filed 0 open-market purchases and 13 sales; 262 institutions reported holding it in 13F filings for Q2 2026, worth $2.23B in total; no superinvestor holds it.
Holders of 5% or more of AEHR
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Aehr Test Systems, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| Jane Street Group, LLC | 13G | 5.10%1.65M shares | New | Jul 29, 20261 filing | Jul 29, 2026 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
21 Schedule 13D and 13G filings on Aehr Test Systems, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Aug 14, 20264:21 PM ET | AWM Investment Company, Inc. | 13G/A | 1.10%374.8K shares | −4.20 ppfrom 5.30%Below 5% | Jun 30, 2026 | SEC |
| Aug 6, 202610:14 AM ET | FMR LLCand 1 other | 13G/A | 3.20%1.01M shares | −3.80 ppfrom 7.00%Below 5% | Jun 30, 2026 | SEC |
| Jul 29, 20264:11 PM ET | Jane Street Group, LLCand 2 others | 13G | 5.10%1.65M shares | New | Jul 24, 2026 | SEC |
| May 6, 202611:00 AM ET | FMR LLCand 1 other | 13G/A | 7.00%2.14M shares | −2.00 ppfrom 9.00% | Mar 31, 2026 | SEC |
| Mar 26, 20263:12 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 9, 202611:43 AM ET | Baillie Gifford & Co | 13G/A | 4.30%1.29M shares | −0.80 ppfrom 5.10%Below 5% | Dec 31, 2025 | SEC |
| Nov 10, 202511:23 AM ET | Baillie Gifford & Co | 13G/A | 5.10%1.53M shares | −1.00 ppfrom 6.10% | Sep 30, 2025 | SEC |
| Nov 5, 202511:26 AM ET | FMR LLCand 1 other | 13G/A | 9.00%2.70M shares | +4.00 ppfrom 5.00% | Sep 30, 2025 | SEC |
| Jul 8, 20259:07 AM ET | FMR LLCand 1 other | 13G/A | 5.00%1.50M shares | −6.30 ppfrom 11.30% | Jun 30, 2025 | SEC |
| May 12, 202510:24 AM ET | FMR LLCand 1 other | 13G/A | 11.30%3.37M shares | – | Mar 31, 2025 | SEC |
| May 7, 20252:41 PM ET | AWM Investment Company, Inc. | 13G | 5.30%1.59M shares | – | Mar 31, 2025 | SEC |
| Nov 7, 20249:49 AM ET | Baillie Gifford & Co | 13G | 6.10%1.81M shares | New | Sep 30, 2024 | SEC |
| Feb 14, 2023 | AWM Investment Company, Inc. | 13GOld format | – | – | – | SEC |
| Feb 14, 2023 | Collaborative Holdings Management LP | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2023 | FMR LLC | 13G/AOld format | – | – | – | SEC |
| Feb 6, 20235:35 PM ET | Goldman Sachs Group Inc | 13GOld format | – | New | – | SEC |
| Feb 14, 2022 | Collaborative Holdings Management LP | 13G/AOld format | – | – | – | SEC |
| Feb 9, 2022 | FMR LLC | 13GOld format | – | New | – | SEC |
| Nov 10, 2021 | AWM Investment Company, Inc. | 13G/AOld format | – | – | – | SEC |
| Oct 5, 2021 | Collaborative Holdings Management LP | 13GOld format | – | New | – | SEC |
| Jan 29, 2021 | Royce & Associates LP | 13G/AOld format | – | – | – | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Aehr Test Systems shares.
No Form 144 notices for Aehr Test Systems are on file.