Every Form 4 that Aehr Test Systems (AEHR) has filed with the SEC in the last 12 months is listed below, newest first, and each one links through to the document itself with the summary and the scores our analysis gives it.
A Form 4 covers the transactions officers, directors and large holders report, so if you follow AEHR and want that one kind of document rather than the whole filing history, this is the page to keep. The company's other filings, of every form, are on the full AEHR filings page.
AEHR TEST SYSTEMS (AEHR) reported that Executive VP of R&D Didier Wimmers had 317 shares of common stock withheld on September 3, 2026 to satisfy tax withholding obligations upon vesting of restricted stock units, which the company notes does not represent a market sale. Following this tax-withholding disposition, Wimmers holds 12,379 shares directly, including shares underlying unvested restricted stock units, and no Rule 10b5-1 trading plan is reported.
AEHR TEST SYSTEMS (AEHR) reported an insider equity transaction by CFO Chris Siu. On 2026-09-01, 496 shares of common stock were withheld at $76.59 per share to satisfy tax withholding obligations upon vesting of restricted stock units and restricted shares; this was not an open-market sale. Following this tax-withholding disposition, Siu directly held 77,328 shares, including shares subject to unvested restricted stock units, and indirectly held 5,706 shares by trust.
AEHR TEST SYSTEMS (AEHR) reported that executive officer Vernon Rogers, Exec VP of Sales & Marketing, sold a total of 5,994 shares of common stock in open market or private transactions. The sales occurred on August 14, 2026 (two trades of 1,000 shares at $134.00 and $139.00) and on August 17, 2026 (3,994 shares at $143.77). A footnote explains that the amount reported for one transaction includes shares subject to unvested restricted stock units. The Rule 10b5-1 trading plan checkbox was not marked as applying to these transactions.
AEHR TEST SYSTEMS Chief Operating Officer Adil Engineer reported a bona fide gift of 500 shares of Common Stock on 2026-08-14, donated to the Engineer Z&A Giving Fund. Following the donation, he holds 46,477 shares directly, which includes shares subject to unvested restricted stock units.
AEHR TEST SYSTEMS director Howard T. Slayen reported a sale of 5,700 shares of Common Stock on August 14, 2026 at an average price of $133.0288 per share in an open-market or private transaction. Following this sale, he holds 140,667 shares directly, including shares subject to unvested restricted stock units.
AEHR TEST SYSTEMS director Rhea J. Posedel, through a trust, reported selling 5,973 shares of common stock on 2026-08-14 in a sale described as an open market or private transaction at $140.00 per share. After this sale, the trust holds 381,989 indirect shares, and a separate line shows 47,156 direct shares, which include shares subject to unvested restricted stock units.
AEHR TEST SYSTEMS executive Alberto Salamone reported two open-market sales of company common stock on 2026-08-13, totaling 9,672 shares. Shares were sold at per-share prices of $128.00 and $127.5014. A portion of the reported holdings includes shares subject to unvested restricted stock units.
Aehr Test Systems President and CEO Gayn Erickson reported two open-market sales of company common stock on August 12, 2026, totaling 40,000 shares held indirectly through a trust. The filing also reports 197,521 shares held directly after the transactions, including shares subject to unvested restricted stock units and unvested restricted shares.
Aehr Test Systems director Rhea J. Posedel reported selling 8,413 shares of common stock on August 12, 2026 at $130 per share through an entity classified as a trust. Following this sale, indirect holdings total 387,962 shares and direct holdings total 47,156 shares, which include shares subject to unvested restricted stock units.
Aehr Test Systems director Geoffrey Scott reported two indirect transactions in Common Stock on 2026-08-12. An entity associated with him made a bona fide gift of 6,731 shares held by a trust to the Scott Family Gift Fund, leaving 23,955 indirect trust shares. His spouse sold 20,000 indirect shares at $131.506 per share, leaving 10,000 indirect shares. Separately, he holds 51,648 shares directly, including shares subject to unvested restricted stock units. The transactions were not reported under a Rule 10b5-1 trading plan.
AEHR TEST SYSTEMS Chief Operating Officer Adil Engineer reported a same-day option exercise and sale sequence. He exercised options to acquire 15,000 shares of common stock at an exercise price of $9.45 per share, then sold 7,500 shares at $130.9549 and another 7,500 shares at $131.0950 per share. Following the derivative exercises, he reported remaining direct option holdings of 31,330 and 28,088 options in the respective grants. One reported amount of common stock includes shares subject to unvested restricted stock units.
Aehr Test Systems director Laura Oliphant reported a sale of 1,717 shares of Common Stock on 2026-08-12 in an open market or private transaction at $133.00 per share. Following this transaction, she reported holding 16,100 shares, which the company notes include shares subject to unvested restricted stock units.
AEHR TEST SYSTEMS executive Alistair N. Sporck, VP Contactor Business Unit, reported selling 1,000 shares of common stock on 2026-08-10 at $108.49 per share. After the sale, he holds 22,547 directly (including unvested restricted stock units) and 5,177 shares indirectly through a trust.
Aehr Test Systems officer Alistair N. Sporck, Vice President of the Contactor Business Unit, reported selling a total of 2,000 shares of common stock on 2026-08-04 in two open-market transactions at $100.695 and $101.10 per share. The filing also reports 5,177 shares held indirectly by a trust, and notes that one reported share amount includes unvested restricted stock units.
Howard T. Slayen, a director of Aehr Test Systems, sold 20,000 shares of common stock on 2026-08-04 at an average price of $108.2961 per share in a sale classified as an open-market or private transaction. Following the sale, he directly holds 146,367 shares, which include shares subject to unvested restricted stock units.
Aehr Test Systems director Laura Oliphant donated 500 shares of common stock on August 4, 2026 as a bona fide gift to USA Triathlon Foundation. The transaction carried a reported per-share price of $0.0000, so no sale proceeds were received. Following the donation, she directly owns 17,817 shares, which include shares subject to unvested restricted stock units.
EVP Alberto Salamone of Aehr Test Systems reported that 204 shares of Common Stock were withheld on August 3, 2026 at $79.98 per share to satisfy tax withholding obligations upon vesting of restricted stock units. This was not an open-market sale. Following the withholding, he holds 51,634 shares, including shares subject to unvested restricted stock units.
AEHR Test Systems director Howard T. Slayen reported a bona fide gift of 5,000 shares of Common Stock on 2026-07-30. The shares were gifted to the Everett Drake Slayen Trust. Following this transfer, he directly holds 166,367 shares, which include shares subject to unvested restricted stock units.
Aehr Test Systems President and CEO Gayn Erickson reported a tax-related share withholding. On 2026-07-27, 1057.0000 common shares were withheld at $77.4800 per share to satisfy tax obligations on vesting equity awards, and the disclosure states this did not represent a sale by Erickson. After this, he held 197521.0000 shares directly, including unvested awards, and 197723.0000 shares indirectly through a trust.
Aehr Test Systems executive Vernon Rogers, Exec VP of Sales & Mktg., reported a tax-related share withholding on July 27, 2026. 198 shares of common stock were withheld at $77.48 per share to satisfy tax obligations upon vesting of restricted stock units, which the company notes does not represent a sale. After this transaction, Rogers directly holds 192,226 shares, and this amount includes shares subject to unvested restricted stock units.
Aehr Test Systems officer Alistair N. Sporck reported that 133 shares of common stock were withheld at $77.48 per share to satisfy tax withholding obligations upon vesting of restricted stock units; this was not an open‑market sale. After the withholding, he held 25,547 shares directly, including unvested RSUs, and 5,177 shares indirectly through a trust.
AEHR TEST SYSTEMS CTO Donald P. Richmond II reported a tax-withholding transaction tied to vesting of restricted stock units. 102 shares of common stock were withheld on 2026-07-27 at $77.48 per share to satisfy tax obligations, and the report notes this is not a sale by the insider. After this withholding, he directly holds 186,567 shares of common stock, including shares subject to unvested restricted stock units.
Aehr Test Systems Chief Operating Officer Adil Engineer reported a tax-related share withholding. On 2026-07-27, 142 shares of Common Stock were withheld at $77.48 per share to satisfy tax withholding obligations upon the vesting of restricted stock units, which the company states does not represent a sale by the reporting person.
Following this withholding, Engineer directly holds 46,977 shares of Common Stock, and this amount includes shares subject to unvested restricted stock units.
AEHR Test Systems director Scott Geoffrey Gates reported a bona fide gift of 2,874 shares of Common Stock on 2026-07-21, donated to the Scott Family Gift Fund. After the gift he directly holds 51,648 shares, including shares subject to unvested restricted stock units, plus indirect holdings of 30,686 shares by a trust and 30,000 shares by his spouse.
Aehr Test Systems executive Alistair N. Sporck, VP Contactor Business Unit, had 334 common shares withheld at $81.05 on July 20, 2026 to satisfy tax withholding obligations upon vesting of restricted stock units; this was not an open-market sale.
After this withholding, Sporck holds 25,680 shares directly, including unvested restricted stock units, and 5,177 shares indirectly through a trust.
Aehr Test Systems director Scott Geoffrey Gates reported multiple transactions in Common Stock on July 16, 2026. An account held indirectly by his spouse sold 20,000 shares at $82.1325 per share, leaving 30,000 shares indirectly held by the spouse. A trust through which he reports indirect ownership made a bona fide gift of 10,000 shares to the Scott Family Fund, with 30,686 shares remaining in that trust. He also reports 54,522 shares held directly, and this direct amount includes shares subject to unvested restricted stock units.
Aehr Test Systems President and CEO Erickson Gayn reported a tax-withholding disposition of 3,447 shares of common stock at $72.01 per share to cover taxes upon vesting of restricted stock units and restricted shares, which is described as not an open-market sale. Following this, he holds 198,578 shares directly, including unvested awards, and 197,723 shares indirectly through a trust.
Aehr Test Systems CTO Donald P. Richmond II reported a tax-withholding disposition of 328 shares of common stock at $72.01 per share. The shares were withheld to satisfy tax obligations upon vesting of restricted stock units and do not represent an open-market sale. Following this transaction, he directly holds 186,669 shares, which includes shares subject to unvested restricted stock units.
AEHR Test Systems Exec VP of Sales & Mktg. Vernon Rogers reported equity award transactions on July 13–14, 2026. He exercised options to acquire 40,000 shares of common stock at $1.635 per share and held 192,424 shares directly afterward, including shares subject to unvested restricted stock units. An aggregate 1,161 shares were withheld to satisfy tax withholding obligations upon restricted stock unit vesting, which footnotes state do not represent open-market sales by Rogers.
AEHR TEST SYSTEMS officer Alistair N. Sporck, VP Contactor Business Unit, reported routine equity activity. On July 13, 2026, 209 shares of common stock were withheld at $72.60 to satisfy tax obligations on vested restricted stock units, and this does not represent a sale. After these entries, Sporck holds 26,014 AEHR shares directly, including unvested RSUs, and 5,177 shares indirectly through a trust.
AEHR TEST SYSTEMS reports that CFO Chris Siu had 988 shares of common stock withheld at $72.60 per share to satisfy tax withholding obligations upon vesting of restricted stock units, which the company states is not a sale. After this, he holds 77,824 shares directly, including shares subject to unvested restricted stock units, and 5,706 shares indirectly through a trust.
AEHR TEST SYSTEMS CTO Donald P. Richmond II reported a tax-withholding disposition related to restricted stock unit vesting. On 2026-07-13, 423 shares of common stock were withheld at $72.60 per share to satisfy tax obligations, and this did not involve an open-market sale. Following the withholding, he holds 186,997 shares directly, including shares subject to unvested restricted stock units.
Aehr Test Systems President and CEO Gayn Erickson reported a compensation-related share withholding. On July 13, 2026, 4,404 common shares at $72.60 per share were withheld to satisfy tax obligations upon vesting of restricted stock units and restricted shares, which does not represent a sale by him. Following these entries, Erickson holds 202,025 shares directly, including unvested awards, and 197,723 shares indirectly through a trust.
AEHR Test Systems reports that Chief Operating Officer Adil Engineer had 387 shares of common stock withheld on July 13, 2026 to satisfy tax withholding obligations upon vesting of restricted stock units at $72.60 per share. This was a non-market tax-withholding disposition, not a sale. After this event, he reports 47,119 shares, including shares subject to unvested restricted stock units.
WIMMERS DIDIER reported acquisition or exercise transactions in this Form 4 filing.
AEHR TEST SYSTEMS Executive VP of R&D Didier Wimmers received an equity award of 2,369 shares of common stock in the form of restricted stock units at no cash cost. Following this grant, he directly holds 12,696 shares, including unvested restricted stock units. One-sixteenth of the total restricted stock units will vest at the end of each three full calendar months after the grant date, as long as he remains employed by the company on those dates.
AEHR TEST SYSTEMS CFO Chris Siu reported equity compensation activity and related tax withholding transactions. He acquired 6,165 and 6,079 shares of common stock as stock awards at no cost, including shares issued upon vesting of performance-based restricted stock units. To satisfy tax withholding obligations on these vestings, 2,213 shares at $84.425 per share and 1,139 shares at $69.96 per share were withheld, which the footnotes state do not represent sales by him. After these transactions, he directly holds 78,812 shares of common stock, and an additional 5,706 shares are held indirectly by a trust.
Aehr Test Systems VP Alistair N. Sporck reported routine equity compensation activity involving restricted stock units. He acquired a total of 8,534 shares of common stock as stock awards, including shares issued upon vesting of a performance-based RSU.
To cover tax withholding obligations on the vesting, the company withheld 2,472 shares at prices of $84.425 and $69.96 per share, which the filing states does not represent a sale by Sporck. After these transactions, he directly holds 26,223 shares, with an additional 5,177 shares held indirectly by a trust.
AEHR Test Systems executive Alberto Salamone reported routine equity compensation activity. He received grants of 1,978 and 4,048 shares of common stock at $0.00 per share as restricted stock unit awards, including performance-based RSUs. The awards vest in equal one-sixteenth installments every three full calendar months, as long as he remains employed. To cover related tax obligations upon vesting, 1,453 shares at $84.425 and 556 shares at $69.96 were withheld by the company, which the disclosure states does not represent market sales. Following these transactions, Salamone directly holds 51,838 shares, and this amount includes shares subject to unvested restricted stock units.
AEHR TEST SYSTEMS CTO Donald P. Richmond II reported routine stock-based compensation activity. On July 1, he received awards totaling 6,165 and 2,369 shares of common stock at no cost in connection with restricted stock units, including performance-based RSUs. A total of 2,524 shares were withheld on July 1 and July 2 at prices of $84.425 and $69.96 per share to cover tax obligations upon vesting, which the company notes do not represent sales. After these transactions, he directly holds 187,420 shares, and this amount includes shares subject to unvested restricted stock units that will vest over time if employment conditions are met.
Aehr Test Systems executive Vernon Rogers reported compensation-related stock activity rather than open-market trading. On July 1, 2026, he acquired 6,165 and 2,393 shares of common stock at $0.00 per share as shares were issued upon vesting of performance-based restricted stock units, according to the footnotes.
To satisfy tax withholding obligations from these vestings, 2,213 shares were withheld on July 1, 2026 at $84.425 per share and 337 shares were withheld on July 2, 2026 at $69.96 per share. The filing notes these tax withholdings do not represent sales by Rogers. After these transactions, he directly holds 153,585 shares of common stock, which include shares subject to unvested restricted stock units.
AEHR Test Systems President and CEO Gayn Erickson reported compensation-related stock activity. On July 1, he received 35,886 and 11,899 shares of common stock at $0.00 per share from RSU awards, including performance-based RSUs. On July 1 and July 2, a total of 26,016 shares were withheld at $84.425 and $69.96 per share to cover tax obligations, which the filing states are not sales. After these transactions, he holds 206,429 shares directly and 197,723 shares indirectly through a trust.
AEHR Test Systems Chief Operating Officer Adil Engineer reported equity compensation changes tied to restricted stock units. On July 1, he acquired 3,079 and 6,165 shares of common stock at $0.00 per share as grants or awards upon vesting of performance-based and other RSUs.
To cover tax obligations on these vestings, 2,213 shares on July 1 at $84.425 and 437 shares on July 2 at $69.96 were withheld, which the filing states do not represent sales. After these transactions, he directly holds 47,506 shares, and this amount includes shares subject to unvested RSUs.
DANESH FARIBA reported acquisition or exercise transactions in this Form 4 filing.
AEHR Test Systems director Fariba Danesh received a grant of 1,658 shares of Common Stock through restricted stock unit awards at no cash cost. One-fourth of the units will vest at the end of each three full calendar months, as long as she continues serving on the Board. Following this award, she is reported as holding 14,801 shares of Common Stock, and this amount includes shares subject to unvested restricted stock units.
SCOTT GEOFFREY GATES reported acquisition or exercise transactions in this Form 4 filing.
Aehr Test Systems director Geoffrey Scott reported updated holdings and a new equity award. He received 1,658 shares of common stock as a grant or award at $0.0000 per share, increasing his direct ownership to 54,522 shares. The filing also reflects indirect holdings of 50,000 shares held by his spouse and 40,686 shares held by a trust.
According to the footnotes, these shares are subject to restricted stock unit terms. One-fourth of the RSU shares vest after each three full calendar months from the grant date, as long as he continues to serve on the Board. The reported amounts include unvested RSUs, meaning some shares are scheduled to vest over time rather than being fully available immediately.
AEHR TEST SYSTEMS director Laura Oliphant received an equity award of 1,658 shares of common stock as a grant or award. The shares were acquired at a stated price of $0.00 per share and are structured as restricted stock units.
After this award, Oliphant directly holds 18,317 shares of common stock, which includes shares subject to unvested restricted stock units. One-fourth of the total restricted stock unit award vests at the end of each three full calendar months following the grant date, as long as she continues to serve on the company’s Board of Directors.
SLAYEN HOWARD T reported acquisition or exercise transactions in this Form 4 filing.
Aehr Test Systems director Howard T. Slayen received a grant of 1,658 shares of Common Stock, awarded at a price of $0.0000 per share. These shares are subject to restricted stock unit awards that vest in four equal parts every three full calendar months, as long as he continues serving on the Board of Directors. After this grant, he directly holds 171,367 shares of Common Stock, including shares subject to unvested restricted stock units.
POSEDEL RHEA J reported acquisition or exercise transactions in this Form 4 filing.
Aehr Test Systems director Rhea J. Posedel reported a new equity grant of 1,895 shares of common stock. The grant was received at no cash cost and increases her directly held shares to 47,156.
The award is in the form of restricted stock units. According to the filing, one-fourth of the total RSU amount vests at the end of each three full calendar months following the grant date, as long as she continues to serve on the Board of Directors. The report also shows 396,375 shares of common stock held indirectly through a trust, which includes shares subject to unvested restricted stock units.
Aehr Test Systems director Laura Oliphant reported charitable gifts of company stock. On June 18, 2026, she made three bona fide gifts totaling 57 shares of Aehr Test Systems common stock, with 19 shares in each transaction at a stated price of $0.00 per share.
The footnotes state that the shares were donated to Pets in Need, Peninsula Humane Society, and San Mateo Community Colleges Foundation. After these gifts, the reported direct holdings shown in the individual transaction lines range from 16,659 to 16,697 shares of common stock.
AEHR Test Systems Executive VP of R&D Didier Wimmers reported a routine tax-withholding transaction related to equity compensation. On the vesting of restricted stock units, 332 shares of common stock were withheld at a reference price of $114.59 per share to cover tax obligations, rather than being sold on the open market.
After this withholding, Wimmers is reported as beneficially owning 10,327 shares of AEHR common stock, and this total includes shares that remain subject to unvested restricted stock units. The filing emphasizes that the transaction does not represent a discretionary sale by the executive.
AEHR Test Systems CFO Chris Siu reported a routine tax-related share withholding on recently vested restricted stock units. The company withheld 350 shares of common stock at $93.62 per share to satisfy tax obligations, which the filing states does not represent a sale by the reporting person.
After this withholding, Siu beneficially owns 69,920 shares of common stock directly, and 5,706 shares indirectly through a trust. The direct total includes shares subject to unvested restricted stock units, showing he retains a sizable equity position following this non-market transaction.