Comparable stake leader
JANE STREET GROUP, 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
BlackRock, Inc.
Comparable rows
4/50
Latest evidence
20 Oct 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
-
JANE STREET GROUP, LLC
Ranking: Comparable ownership first, then disclosed value
- Comparable ownership rows
-
4 of 50
Meaning: Rows with safely comparable ownership %
- Latest 13D/G holder
-
JANE STREET GROUP, LLC
Source: Latest parsed Schedule 13D/G stake
- Latest parsed ownership date
-
20 Oct 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
JANE STREET GROUP, LLC
Disclosed value leader
BlackRock, Inc.
Comparable rows
4/50
Latest evidence
20 Oct 2026
13D/G
13F
3/4/5
Lead comparable stake: 5.1%
46 rows are not safely comparable across share classes.
13D/G row: JANE STREET GROUP, LLC
Showing 1-8 of 50 holder rows.
Quick read
JANE STREET GROUP, LLC leads the comparable SEC ownership view at 5.1%.
4 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 JANE STREET GROUP, LLC's linked filing trail.
Comparable ownership
Top 4
JANE STREET GROUP, LLC
5.1%
BAILLIE GIFFORD & CO
4.3%
FMR LLC
3.2%
AWM Investment Company, Inc.
1.1%
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 |
|---|---|---|---|---|---|
| JANE STREET GROUP, LLC |
13D/G
13F
Company
|
5.1%
Reported 13D/G
· 24 Jul 2026
|
$158,357,119
1,648,523 shares
|
$0 | 24 Jul 2026 |
| BAILLIE GIFFORD & CO |
13D/G
13F
Company
|
4.3%
Reported 13D/G
· 31 Dec 2025
|
$34,010,841
1,290,734 shares
|
-$6,322,472 | 31 Dec 2025 |
| FMR LLC |
13F
13D/G
Company
|
3.2%
Reported 13D/G
· 30 Jun 2026
|
$96,716,092
1,006,830 shares
|
— | 30 Jun 2026 |
| AWM Investment Company, Inc. |
13F
13D/G
Company
|
1.1%
Reported 13D/G
· 30 Jun 2026
|
$36,004,056
374,808 shares
|
— | 30 Jun 2026 |
| BlackRock, Inc. |
13F
Company
|
—
denominator unverified
|
$255,475,603
2,659,542 shares
|
— | 30 Jun 2026 |
| VANGUARD CAPITAL MANAGEMENT LLC |
13F
Company
|
—
denominator unverified
|
$126,832,821
1,320,350 shares
|
— | 30 Jun 2026 |
| D. E. Shaw & Co., Inc. |
13F
Company
|
—
denominator unverified
|
$113,103,061
1,177,421 shares
|
— | 30 Jun 2026 |
| TWO SIGMA INVESTMENTS, LP |
13F
Company
|
—
denominator unverified
|
$111,872,821
1,164,614 shares
|
— | 30 Jun 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: -$60,900,454.
Buys
$0
Insiders: 0
Sells
$60,900,454
Insiders: 13
Net
-$60,900,454
Shares: -704,893
Window
Last 12 months
4 rolling buckets
Buy value
Sell value
Shares: 0
Shares: 704,893
| Window (months) | Buy shares | Sell shares | Buy value | Sell value | Net value |
|---|---|---|---|---|---|
| 0-3 | 0 | 135,469 | $0 | $17,304,581 | -$17,304,581 |
| 3-6 | 0 | 28,889 | $0 | $2,578,412 | -$2,578,412 |
| 6-9 | 0 | 529,989 | $0 | $40,720,353 | -$40,720,353 |
| 9-12 | 0 | 10,546 | $0 | $297,108 | -$297,108 |
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
-$60,900,455
Latest report
20 Oct 2026
| Name | Relationship | Holdings Value | Past Year Net Change | Change % | Valuation | Report Date |
|---|---|---|---|---|---|---|
| Rhea J. Posedel | Director | $44,544,584 | -$9,549,173 | -18% | Median | 20 Oct 2026 |
| Gayn Erickson | President and CEO, Director | $34,855,513 | -$16,020,510 | -31% | Median | 12 Oct 2026 |
| Slayen Howard T. | Director | $18,712,762 | -$5,917,697 | -24% | Filing P/S | 14 Aug 2026 |
| Vernon Rogers | Exec VP of Sales & Mktg. | $18,616,923 | -$3,322,838 | -15% | Median | 12 Oct 2026 |
| Donald P. Richmond II | Cto | $18,601,880 | -$2,326,660 | -11% | Median | 12 Oct 2026 |
| Geoffrey Gates Scott | Director | $8,577,483 | -$12,653,670 | -60% | Mixed | 12 Aug 2026 |
| Siu Chris | Cfo | $8,146,740 | -$221,608 | -2.6% | Median | 12 Oct 2026 |
| Adil Engineer | Chief Operating Officer | $4,576,751 | -$3,104,725 | -40% | Median | 12 Oct 2026 |
| Alberto Salamone | Evp, Ppbi Business | $4,118,380 | -$3,997,238 | -49% | Mixed | 02 Oct 2026 |
| Alistair N. Sporck | VP Contactor Business Unit | $2,814,370 | -$878,603 | -24% | Median | 12 Oct 2026 |
| Laura Oliphant | Director | $2,141,300 | -$1,115,374 | -34% | Filing P/S | 12 Aug 2026 |
| Kenneth B. Spink | VP of Finance and CFO | $1,911,009 | Mixed | 17 Jul 2023 | ||
| David S. Hendrickson | Former CTO | $1,474,716 | Mixed | 17 Jul 2023 | ||
| Didier Wimmers | Executive VP of R&D | $1,309,874 | -$385,731 | -23% | Mixed | 01 Oct 2026 |
| Fariba Danesh | Director | $548,821 | -$1,406,628 | -72% | Mixed | 01 Jul 2026 |
| K. Ray Chaudhuri | Executive VP of R&D | $448,557 | Mixed | 27 Oct 2024 | ||
| Mario M. Rosati | Director | Mixed | 06 Jun 2023 | |||
| Michael A. Brannan | Former Vp Of Operations | Mixed | 26 Jan 2022 |
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 |
|---|---|---|---|---|---|---|---|---|---|---|
| Rhea J. Posedel | AEHR | Common Stock | Options Exercise | 38.2% | 18,000 | 65,156 | 20 Oct 2026 | Direct | ||
| Rhea J. Posedel | AEHR | Non-Qualified Option (right to buy) | Options Exercise | -100% | -18,000 | 0 | 20 Oct 2026 | Direct | ||
| Siu Chris | AEHR | Common Stock | Tax liability | -1.3% | -987 | 74,983 | 12 Oct 2026 | Direct | ||
| Alistair N. Sporck | AEHR | Common Stock | Tax liability | -1.33% | -295 | 21,853 | 12 Oct 2026 | Direct | ||
| Vernon Rogers | AEHR | Common Stock | Tax liability | -0.23% | -426 | 186,879 | 12 Oct 2026 | Direct | ||
| Donald P. Richmond II | AEHR | Common Stock | Tax liability | -0.21% | -388 | 186,728 | 12 Oct 2026 | Direct | ||
| Adil Engineer | AEHR | Common Stock | Tax liability | -1.18% | -547 | 45,942 | 12 Oct 2026 | Direct | ||
| Gayn Erickson | AEHR | Common Stock | Tax liability | -1.38% | -2,675 | 191,108 | 12 Oct 2026 | Direct | ||
| Gayn Erickson | AEHR | Common Stock | Tax liability | -1.64% | -3,239 | 193,783 | 02 Oct 2026 | Direct | ||
| Adil Engineer | AEHR | Common Stock | Tax liability | -1.32% | -620 | 46,489 | 02 Oct 2026 | Direct | ||
| Donald P. Richmond II | AEHR | Common Stock | Tax liability | -0.23% | -439 | 187,116 | 02 Oct 2026 | Direct | ||
| Vernon Rogers | AEHR | Common Stock | Tax liability | -0.25% | -476 | 187,305 | 02 Oct 2026 | Direct | ||
| Alberto Salamone | AEHR | Common Stock | Tax liability | -1.28% | -556 | 42,873 | 02 Oct 2026 | Direct | ||
| Siu Chris | AEHR | Common Stock | Tax liability | -1.51% | -1,164 | 75,970 | 02 Oct 2026 | Direct | ||
| Alistair N. Sporck | AEHR | Common Stock | Tax liability | -1.53% | -345 | 22,148 | 02 Oct 2026 | Direct | ||
| Gayn Erickson | AEHR | Common Stock | Other | 0.67% | 1,053 | 158,776 | 01 Oct 2026 | By Trust | ||
| Gayn Erickson | AEHR | Common Stock | Tax liability | -0.25% | -499 | 197,022 | 01 Oct 2026 | Direct | ||
| Alistair N. Sporck | AEHR | Common Stock | Other | 23.6% | 1,221 | 6,398 | 01 Oct 2026 | By Trust | ||
| Alistair N. Sporck | AEHR | Common Stock | Tax liability | -0.24% | -54 | 22,493 | 01 Oct 2026 | Direct | ||
| Didier Wimmers | AEHR | Common Stock | Tax liability | -0.39% | -54 | 13,636 | 01 Oct 2026 | Direct | ||
| Didier Wimmers | AEHR | Common Stock | Other | 10.6% | 1,311 | 13,690 | 01 Oct 2026 | Direct | ||
| Alberto Salamone | AEHR | Common Stock | Tax liability | -0.1% | -45 | 43,429 | 01 Oct 2026 | Direct | ||
| Alberto Salamone | AEHR | Common Stock | Other | 3.6% | 1,512 | 43,474 | 01 Oct 2026 | Direct | ||
| Vernon Rogers | AEHR | Common Stock | Tax liability | -0.04% | -77 | 187,781 | 01 Oct 2026 | Direct | ||
| Vernon Rogers | AEHR | Common Stock | Other | 0.87% | 1,626 | 187,858 | 01 Oct 2026 | Direct | ||
| Donald P. Richmond II | AEHR | Common Stock | Tax liability | -0.04% | -76 | 187,555 | 01 Oct 2026 | Direct | ||
| Donald P. Richmond II | AEHR | Common Stock | Other | 0.57% | 1,064 | 187,631 | 01 Oct 2026 | Direct | ||
| Adil Engineer | AEHR | Common Stock | Tax liability | -0.21% | -98 | 47,109 | 01 Oct 2026 | Direct | ||
| Adil Engineer | AEHR | Common Stock | Other | 1.57% | 730 | 47,207 | 01 Oct 2026 | Direct | ||
| Siu Chris | AEHR | Common Stock | Other | 19.1% | 1,089 | 6,795 | 01 Oct 2026 | By Trust | ||
| Siu Chris | AEHR | Common Stock | Tax liability | -0.25% | -194 | 77,134 | 01 Oct 2026 | Direct | ||
| Didier Wimmers | AEHR | Common Stock | Tax liability | -2.5% | -317 | 12,379 | 03 Sep 2026 | Direct | ||
| Siu Chris | AEHR | Common Stock | Tax liability | -0.64% | -496 | 77,328 | 01 Sep 2026 | Direct | ||
| Vernon Rogers | AEHR | Common Stock | Sale | -2.1% | $574,217 | $143.77 | -3,994 | 186,232 | 17 Aug 2026 | Direct |
| Vernon Rogers | AEHR | Common Stock | Sale | -1.04% | $273,000 | $136.50 | -2,000 | 190,226 | 14 Aug 2026 | Direct |
| Adil Engineer | AEHR | Common Stock | Gift | -1.06% | -500 | 46,477 | 14 Aug 2026 | Direct | ||
| Slayen Howard T. | AEHR | Common Stock | Sale | -3.89% | $758,264 | $133.03 | -5,700 | 140,667 | 14 Aug 2026 | Direct |
| Rhea J. Posedel | AEHR | Common Stock | Sale | -1.54% | $836,220 | $140.00 | -5,973 | 381,989 | 14 Aug 2026 | By Trust |
| Alberto Salamone | AEHR | Common Stock | Sale | -18.7% | $1,235,288 | $127.72 | -9,672 | 41,962 | 13 Aug 2026 | Direct |
| Gayn Erickson | AEHR | Common Stock | Sale | -20.2% | $5,233,718 | $130.84 | -40,000 | 157,723 | 12 Aug 2026 | By Trust |
| Rhea J. Posedel | AEHR | Common Stock | Sale | -2.12% | $1,093,690 | $130.00 | -8,413 | 387,962 | 12 Aug 2026 | By Trust |
| Geoffrey Gates Scott | AEHR | Common Stock | Sale | -66.7% | $2,630,120 | $131.51 | -20,000 | 10,000 | 12 Aug 2026 | By Spouse |
| Geoffrey Gates Scott | AEHR | Common Stock | Gift | -21.9% | -6,731 | 23,955 | 12 Aug 2026 | By Trust | ||
| Adil Engineer | AEHR | Common Stock | Sale | -24.2% | $1,965,374 | $131.02 | -15,000 | 46,977 | 12 Aug 2026 | Direct |
| Adil Engineer | AEHR | Common Stock | Options Exercise | 31.9% | 15,000 | 61,977 | 12 Aug 2026 | Direct | ||
| Adil Engineer | AEHR | Non-Qualified Option (right to buy) | Options Exercise | -21.1% | -7,500 | 28,088 | 12 Aug 2026 | Direct | ||
| Adil Engineer | AEHR | Option (right to buy) | Options Exercise | -19.3% | -7,500 | 31,330 | 12 Aug 2026 | Direct | ||
| Laura Oliphant | AEHR | Common Stock | Sale | -9.64% | $228,361 | $133.00 | -1,717 | 16,100 | 12 Aug 2026 | Direct |
| Alistair N. Sporck | AEHR | Common Stock | Sale | -4.25% | $108,490 | $108.49 | -1,000 | 22,547 | 10 Aug 2026 | Direct |
| Alistair N. Sporck | AEHR | Common Stock | Sale | -7.83% | $201,917 | $100.96 | -2,000 | 23,547 | 04 Aug 2026 | Direct |
* marks a reported price that did not pass the local price check.