Comparable stake leader
FMR LLC
SEC ownership of AEHR TEST SYSTEMS
Top holders, 13D/G large-stake signals, insider positions, and transaction flow tied to CIK 0001040470.
Disclosed value leader
FMR LLC
Comparable rows
50/50
Latest evidence
03 Jun 2026
- Public ticker
- AEHR on Nasdaq
- Parsed ownership sources
-
13D/G, 13F, and 3/4/5
Source: Parsed SEC ownership filingsUse: Compare filing families carefully
- Largest SEC-reported holder
-
FMR LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
50 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
FMR LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
03 Jun 2026
Freshness: Most recent filing date in this holder set
- Issuer CIK
- 0001040470
- Issuer location
- Fremont, CA
Ownership snapshot
CIK-linked ownership evidence from parsed SEC filings.
3 signals
Issuer
Names, identifiers, and filing context for this profile.
2 identity fields
Ownership snapshot
Top shareholders of AEHR TEST SYSTEMS (13F + 13D/G + 3/4/5)
Grouped by holder across the latest SEC ownership disclosures. Start with comparable ownership when available, then verify the linked 13F, 13D/G, or 3/4/5 evidence.
Comparable stake leader
FMR LLC
Disclosed value leader
FMR LLC
Comparable rows
50/50
Latest evidence
03 Jun 2026
13D/G
13F
3/4/5
Lead comparable stake: 7%
13D/G row: FMR LLC
Showing 1-8 of 50 holder rows.
Quick read
FMR LLC leads the comparable SEC ownership view at 7%.
50 of 50 rows have a safely comparable ownership percentage. Use this as a filing-backed starting point, then open the detailed table for source links, reporting role, position value, share count, and filing date.
Open SEC evidence
Opens FMR LLC's linked filing trail.
Comparable ownership
Top 5
FMR LLC
7%
AWM Investment Company, Inc.
5.3%
BAILLIE GIFFORD & CO
4.3%
Rhea J. Posedel
1.4%
Gayn Erickson
1.2%
Ownership % is shown only when SEC disclosures are safely comparable across share classes.
Detailed SEC evidence table Showing 1-8 of 50 holder rows
| Holder | Evidence | Ownership % | Position | 12M Net Δ | As of |
|---|---|---|---|---|---|
| FMR LLC |
13D/G
13F
Company
|
7%
|
$153,541,489
2,142,639 shares
|
-$40,030,351 | 31 Mar 2026 |
| AWM Investment Company, Inc. |
13F
13D/G
Company
|
5.3%
from 13D/G
|
$59,104,445
1,593,971 shares
|
— | 31 Mar 2026 |
| BAILLIE GIFFORD & CO |
13F
13D/G
Company
|
4.3%
from 13D/G
|
$37,117,747
1,001,018 shares
|
— | 31 Mar 2026 |
| Rhea J. Posedel |
3/4/5
Director
|
1.4%
|
$42,181,725
441,636 shares
|
-$7,976,236 | 22 Apr 2026 |
| Gayn Erickson |
3/4/5
President and CEO, Director
|
1.2%
|
$14,178,760
382,383 shares
|
-$10,786,792 | 27 Apr 2026 |
| Donald P. Richmond II |
3/4/5
CTO
|
0.59%
|
$6,726,682
181,410 shares
|
-$2,326,660 | 27 Apr 2026 |
| Slayen Howard T. |
3/4/5
Director
|
0.55%
|
$17,773,623
169,709 shares
|
-$2,993,511 | 13 May 2026 |
| Vernon Rogers |
3/4/5
Exec VP of Sales & Mktg.
|
0.48%
|
$5,472,155
147,577 shares
|
-$2,475,620 | 27 Apr 2026 |
How to read this table
Rows are grouped by holder and ranked first by SEC-reported ownership % when it is safely comparable, then by disclosed holdings value. — indicates unavailable or non-comparable values; "mixed-class rows" means the latest filing spans non-comparable classes.
Forms 3/4/5 flow
Insider trading overview
Net insider flow leans to selling over the last 12 months. Net value: -$42,683,188.
Buys
$0
Insiders: 0
Sells
$42,683,188
Insiders: 13
Net
-$42,683,188
Shares: -584,424
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 584,424
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 521,880 | $0 | $41,153,248 | -$41,153,248 |
| 3-6 | 0 | 21,544 | $0 | $645,618 | -$645,618 |
| 6-9 | 0 | 15,000 | $0 | $377,459 | -$377,459 |
| 9-12 | 0 | 26,000 | $0 | $506,864 | -$506,864 |
Reporting owners
Insider holders from Forms 3/4/5
Showing 1-18 of 18 reporting-owner rows connected to AEHR TEST SYSTEMS. Open a relationship link for the CIK-to-CIK filing trail.
Rows
18
Largest Forms 3/4/5 holder
Rhea J. Posedel
Net 12M change
-$42,683,190
Latest report
03 Jun 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Rhea J. Posedel | Director | $42,181,725 | -$7,976,236 | -16% | Filing P/S | 22 Apr 2026 |
| Slayen Howard T. | Director | $17,773,623 | -$2,993,511 | -14% | Filing P/S | 13 May 2026 |
| Gayn Erickson | President and CEO, Director | $14,178,760 | -$10,786,792 | -43% | Median | 27 Apr 2026 |
| Donald P. Richmond II | Cto | $6,726,682 | -$2,326,660 | -26% | Median | 27 Apr 2026 |
| Vernon Rogers | Exec VP of Sales & Mktg. | $5,472,155 | -$2,475,620 | -31% | Median | 27 Apr 2026 |
| Geoffrey Gates Scott | Director | $5,322,833 | -$8,380,900 | -61% | Median | 29 Apr 2026 |
| Siu Chris | Cfo | $2,804,211 | -$221,608 | -7.3% | Median | 01 Jun 2026 |
| Kenneth B. Spink | VP of Finance and CFO | $1,911,009 | Mixed | 17 Jul 2023 | ||
| Alberto Salamone | Evp, Ppbi Business | $1,773,202 | -$2,761,950 | -61% | Median | 01 May 2026 |
| Adil Engineer | Chief Operating Officer | $1,517,016 | -$1,139,351 | -43% | Median | 27 Apr 2026 |
| David S. Hendrickson | Former CTO | $1,474,716 | Mixed | 17 Jul 2023 | ||
| Laura Oliphant | Director | $1,363,022 | -$994,515 | -42% | Filing P/S | 16 Apr 2026 |
| Fariba Danesh | Director | $1,086,006 | -$1,629,730 | -60% | Filing P/S | 16 Apr 2026 |
| Alistair N. Sporck | VP Contactor Business Unit | $939,532 | -$610,586 | -39% | Median | 27 Apr 2026 |
| K. Ray Chaudhuri | Executive VP of R&D | $448,557 | Mixed | 27 Oct 2024 | ||
| Didier Wimmers | Executive VP of R&D | $382,925 | -$385,731 | -50% | Median | 03 Jun 2026 |
| Michael A. Brannan | Former Vp Of Operations | Mixed | 26 Jan 2022 | |||
| Mario M. Rosati | Director | Mixed | 06 Jun 2023 |
Recent insider transactions for AEHR TEST SYSTEMS
Showing up to 300 recent insider transactions from the last 12 months.
| Insider | Symbol | Class | Transaction | % | SEC-reported value | SEC-reported price | Shares | Shares owned | Date | Ownership |
|---|---|---|---|---|---|---|---|---|---|---|
| Didier Wimmers | AEHR | Common Stock | Tax liability | -3.11% | -332 | 10,327 | 03 Jun 2026 | Direct | ||
| Siu Chris | AEHR | Common Stock | Tax liability | -0.5% | -350 | 69,920 | 01 Jun 2026 | Direct | ||
| Chris Siu | AEHR | Common Stock | Sale | -21.9% | $170,848 | $106.78 | -1,600 | 5,706 | 14 May 2026 | By Trust |
| Chris Siu | AEHR | Common Stock | Sale | -0.66% | $50,760 | $108.00 | -470 | 70,270 | 14 May 2026 | Direct |
| Slayen Howard T. | AEHR | Common Stock | Sale | -3.86% | $714,154 | $104.73 | -6,819 | 169,709 | 13 May 2026 | Direct |
| Alberto Salamone | AEHR | Common Stock | Tax liability | -0.42% | -204 | 47,821 | 01 May 2026 | Direct | ||
| Geoffrey Gates Scott | AEHR | Common Stock | Gift | -19.7% | -10,000 | 40,686 | 29 Apr 2026 | By Trust | ||
| Alistair N. Sporck | AEHR | Common Stock | Tax liability | -0.66% | -133 | 20,161 | 27 Apr 2026 | Direct | ||
| Vernon Rogers | AEHR | Common Stock | Tax liability | -0.09% | -139 | 147,577 | 27 Apr 2026 | Direct | ||
| Donald P. Richmond II | AEHR | Common Stock | Tax liability | -0.06% | -102 | 181,410 | 27 Apr 2026 | Direct | ||
| Gayn Erickson | AEHR | Common Stock | Tax liability | -0.46% | -851 | 184,660 | 27 Apr 2026 | Direct | ||
| Adil Engineer | AEHR | Common Stock | Tax liability | -0.35% | -143 | 40,912 | 27 Apr 2026 | Direct | ||
| Rhea J. Posedel | AEHR | Common Stock | Sale | -0.15% | $57,380 | $95.00 | -604 | 396,375 | 22 Apr 2026 | By Trust |
| Rhea J. Posedel | AEHR | Common Stock | Sale | -27.4% | $1,711,500 | $100.00 | -17,115 | 45,261 | 22 Apr 2026 | Direct |
| Alistair N. Sporck | AEHR | Common Stock | Sale | -27.9% | $186,990 | $93.50 | -2,000 | 5,177 | 22 Apr 2026 | By Trust |
| Slayen Howard T. | AEHR | Common Stock | Gift | -1.01% | -1,800 | 176,528 | 22 Apr 2026 | Direct | ||
| Alberto Salamone | AEHR | Common Stock | Sale | -23.8% | $1,418,400 | $94.56 | -15,000 | 48,025 | 21 Apr 2026 | Direct |
| Geoffrey Gates Scott | AEHR | Common Stock | Sale | -50% | $4,750,000 | $95.00 | -50,000 | 50,000 | 21 Apr 2026 | By Spouse |
| Geoffrey Gates Scott | AEHR | Common Stock | Sale | -16.5% | $910,000 | $91.00 | -10,000 | 50,686 | 21 Apr 2026 | By Trust |
| Rhea J. Posedel | AEHR | Common Stock | Sale | -12.4% | $843,757 | $96.02 | -8,787 | 62,376 | 21 Apr 2026 | Direct |
| Vernon Rogers | AEHR | Common Stock | Sale | -4.07% | $610,270 | $94.09 | -6,486 | 152,716 | 21 Apr 2026 | Direct |
| Alberto Salamone | AEHR | Common Stock | Sale | -19.2% | $1,343,550 | $89.57 | -15,000 | 63,025 | 20 Apr 2026 | Direct |
| Vernon Rogers | AEHR | Common Stock | Sale | -3.27% | $450,000 | $90.00 | -5,000 | 147,716 | 20 Apr 2026 | Direct |
| Vernon Rogers | AEHR | Common Stock | Sale | -1.5% | $218,790 | $90.00 | -2,431 | 159,202 | 20 Apr 2026 | Direct |
| Rhea J. Posedel | AEHR | Common Stock | Sale | -1.85% | $660,675 | $88.09 | -7,500 | 396,979 | 20 Apr 2026 | By Trust |
| Alistair N. Sporck | AEHR | Common Stock | Tax liability | -1.65% | -341 | 20,294 | 18 Apr 2026 | Direct | ||
| Rhea J. Posedel | AEHR | Common Stock | Sale | -1.82% | $615,000 | $82.00 | -7,500 | 404,479 | 17 Apr 2026 | By Trust |
| Slayen Howard T. | AEHR | Common Stock | Sale | -12.3% | $2,125,000 | $85.00 | -25,000 | 178,328 | 17 Apr 2026 | Direct |
| Fariba Danesh | AEHR | Common Stock | Sale | -37.8% | $661,040 | $82.63 | -8,000 | 13,143 | 16 Apr 2026 | Direct |
| Fariba Danesh | AEHR | Common Stock | Options Exercise | 60.9% | 8,000 | 21,143 | 16 Apr 2026 | Direct | ||
| Fariba Danesh | AEHR | Non-Qualified Option (right to buy) | Options Exercise | -100% | -8,000 | 0 | 16 Apr 2026 | Direct | ||
| Laura Oliphant | AEHR | Common Stock | Sale | -9.31% | $139,923 | $81.54 | -1,716 | 16,716 | 16 Apr 2026 | Direct |
| Vernon Rogers | AEHR | Common Stock | Sale | -3% | $434,400 | $86.88 | -5,000 | 161,633 | 16 Apr 2026 | Direct |
| Alistair N. Sporck | AEHR | Common Stock | Sale | -8.84% | $163,760 | $81.88 | -2,000 | 20,635 | 16 Apr 2026 | Direct |
| Laura Oliphant | AEHR | Common Stock | Sale | -100% | $399,268 | $85.59 | -4,665 | 0 | 16 Apr 2026 | By Trust |
| Rhea J. Posedel | AEHR | Common Stock | Sale | -3.51% | $1,210,800 | $80.72 | -15,000 | 411,979 | 16 Apr 2026 | By Trust |
| Didier Wimmers | AEHR | Common Stock | Sale | -15.1% | $136,845 | $72.02 | -1,900 | 10,659 | 15 Apr 2026 | Direct |
| Donald P. Richmond II | AEHR | Common Stock | Sale | -8.57% | $1,244,804 | $73.18 | -17,011 | 181,512 | 14 Apr 2026 | Direct |
| Gayn Erickson | AEHR | Common Stock | Tax liability | -1.48% | -2,784 | 185,511 | 14 Apr 2026 | Direct | ||
| Vernon Rogers | AEHR | Common Stock | Tax liability | -0.24% | -404 | 166,633 | 14 Apr 2026 | Direct | ||
| Donald P. Richmond II | AEHR | Common Stock | Tax liability | -0.15% | -299 | 198,523 | 14 Apr 2026 | Direct | ||
| Didier Wimmers | AEHR | Common Stock | Sale | -21.8% | $248,886 | $71.11 | -3,500 | 12,559 | 13 Apr 2026 | Direct |
| Fariba Danesh | AEHR | Common Stock | Sale | -34.8% | $500,431 | $71.49 | -7,000 | 13,143 | 13 Apr 2026 | Direct |
| Fariba Danesh | AEHR | Common Stock | Options Exercise | 53.3% | 7,000 | 20,143 | 13 Apr 2026 | Direct | ||
| Fariba Danesh | AEHR | Non-Qualified Option (right to buy) | Options Exercise | -46.7% | -7,000 | 8,000 | 13 Apr 2026 | Direct | ||
| Siu Chris | AEHR | Common Stock | Tax liability | -0.98% | -697 | 70,740 | 11 Apr 2026 | Direct | ||
| Vernon Rogers | AEHR | Common Stock | Tax liability | -0.3% | -503 | 167,037 | 11 Apr 2026 | Direct | ||
| Donald P. Richmond II | AEHR | Common Stock | Tax liability | -0.21% | -423 | 198,822 | 11 Apr 2026 | Direct | ||
| Gayn Erickson | AEHR | Common Stock | Tax liability | -1.93% | -3,704 | 188,295 | 11 Apr 2026 | Direct | ||
| Alistair N. Sporck | AEHR | Common Stock | Tax liability | -0.96% | -220 | 22,635 | 11 Apr 2026 | Direct |
* marks a reported price that did not pass the local price check.