AEHR TEST SYS AEHR
COM · Common Stock · CUSIP 00760J108 · ISIN US00760J1088
Semiconductor manufacturing support company
* Summed across managers. Shares that two managers' reports both contain – a subsidiary's holdings that its parent's report includes too, or a sub-adviser's in its client's – are counted once ($44.3k this quarter). Holder counts are more reliable. Shares outstanding: 28.9m as of 2024-04-01, from the company's own SEC filing; the percentage can still exceed 100%: lent-out shares are counted by the lender and the buyer, and some reports overlap without saying so. Implied quarter-end price ≈ $12.64. Options: 20 managers hold calls ($18.9m notional), 18 hold puts ($20.3m).
Trends to Q1 2024
Institutional holders
Managers reporting a position, each quarter
Numbers
| Quarter | Holders |
|---|---|
| Q3 2022 | 85 |
| Q4 2022 | 129 |
| Q1 2023 | 145 |
| Q2 2023 | 153 |
| Q3 2023 | 154 |
| Q4 2023 | 169 |
| Q1 2024 | 133 |
Buyers vs sellers
Managers adding to or starting a position, vs cutting or selling out
Numbers
| Quarter | Bought or added | Cut or sold out |
|---|---|---|
| Q4 2022 | 77 | 38 |
| Q1 2023 | 85 | 69 |
| Q2 2023 | 94 | 76 |
| Q3 2023 | 101 | 69 |
| Q4 2023 | 113 | 76 |
| Q1 2024 | 68 | 106 |
Calls vs puts
Options held, notional value, last 4 quarters. P/C = puts ÷ calls
Numbers
| Quarter | Calls | Puts | P/C |
|---|---|---|---|
| Q2 2023 | $61.7m | $41.6m | 0.68 |
| Q3 2023 | $56.1m | $45.7m | 0.81 |
| Q4 2023 | $50.3m | $23.4m | 0.46 |
| Q1 2024 | $18.9m | $20.3m | 1.07 |
Biggest buyers
| BANK OF MONTREAL /CAN/ | Added | +1.0m |
| NOMURA HOLDINGS INC | New | +811.0k |
| MORGAN STANLEY | Added | +773.7k |
| VANGUARD GROUP INC | Added | +589.0k |
| Amitell Capital Pte Ltd | New | +325.7k |
| Halter Ferguson Financial Inc. | Added | +304.0k |
| WELLINGTON MANAGEMENT GROUP LLP | New | +199.6k |
| AMERIPRISE FINANCIAL INC | Added | +176.6k |
| BAILLIE GIFFORD & CO | Added | +166.3k |
| BANK OF AMERICA CORP /DE/ | Added | +132.8k |
Biggest sellers
| Hood River Capital Management LLC | Sold out | -936.8k |
| CONGRESS ASSET MANAGEMENT CO | Sold out | -875.6k |
| LORD, ABBETT & CO. LLC | Sold out | -294.3k |
| NEUBERGER BERMAN GROUP LLC | Sold out | -288.1k |
| MILLENNIUM MANAGEMENT LLC | Reduced | -284.0k |
| AGF MANAGEMENT LTD | Sold out | -276.0k |
| D. E. Shaw & Co., Inc. | Reduced | -275.4k |
| DIMENSIONAL FUND ADVISORS LP | Reduced | -259.7k |
| Symmetry Investments LP | Reduced | -241.5k |
| Qube Research & Technologies Ltd | Sold out | -213.6k |
Biggest calls
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $4.3m350.3k shares |
| CAPITAL FUND MANAGEMENT S.A. | Added | $2.5m201.8k shares |
| Squarepoint Ops LLC | New | $2.1m172.1k shares |
| CITADEL ADVISORS LLC | Reduced | $1.4m115.0k shares |
| SIMPLEX TRADING, LLC | Added | $1.3m107.6k shares |
| TWO SIGMA SECURITIES, LLC | New | $1.3m102.8k shares |
| WOLVERINE TRADING, LLC | Reduced | $1.0m82.1k shares |
| GROUP ONE TRADING LLC | Reduced | $782.4k63.1k shares |
| JANE STREET GROUP, LLC | Reduced | $729.1k58.8k shares |
| Symmetry Investments LP | Reduced | $620.0k50.0k shares |
Biggest puts
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Added | $6.4m513.4k shares |
| CITADEL ADVISORS LLC | Added | $3.4m271.7k shares |
| SIMPLEX TRADING, LLC | Added | $1.9m149.7k shares |
| CAPITAL FUND MANAGEMENT S.A. | Added | $1.4m116.6k shares |
| IMC-Chicago, LLC | New | $1.4m115.5k shares |
| WOLVERINE TRADING, LLC | Added | $869.2k70.1k shares |
| JANE STREET GROUP, LLC | Added | $854.4k68.9k shares |
| Squarepoint Ops LLC | New | $768.8k62.0k shares |
| GROUP ONE TRADING LLC | Added | $747.7k60.3k shares |
| TWO SIGMA SECURITIES, LLC | New | $598.9k48.3k shares |
Options at notional value: the value of the shares the contracts control, as filers report them, not what the options cost. Not included in the holders, shares or buying above.
Major shareholders (over 5%)
Anyone who owns more than 5% of a class of the company's shares has to say so: on Schedule 13D if they may try to influence or control the company, on 13G if they're a passive investor, and update it as the stake changes. Each holder's latest filing, from 19 Dec 2024 on; percentages are of the share class, as the holder worked them out.
| Holder | Stake |
|---|---|
| JANE STREET GROUP, LLC 13G · passive investor new · filed 2026-07-29 | 5.1% |
Fell to 5% or below in the last year: AWM Investment Company, Inc. (1.1%, 2026-08-14), FMR LLC (3.2%, 2026-08-06), VANGUARD GROUP INC (0.0%, 2026-03-26), BAILLIE GIFFORD & CO (4.3%, 2026-02-09)
Insider purchases and sales in Q1 2024
Shares bought or sold by the company's own officers, directors and 10% owners, in the open market or privately, as they reported to the SEC on Form 4 (due within two business days of the trade). Grants, option exercises, shares withheld for tax and gifts aren't included.
Officers and directors buying vs selling
Number of people, by quarter (10% owners not included)
Numbers
| Quarter | Buying | Bought | Selling | Sold | Sold under a plan |
|---|---|---|---|---|---|
| Q2 2022 | 0 | — | 1 | $47.1k | — |
| Q3 2022 | 0 | — | 2 | $1.0m | — |
| Q4 2022 | 0 | — | 9 | $5.9m | — |
| Q1 2023 | 0 | — | 11 | $25.4m | $2.0m |
| Q2 2023 | 0 | — | 4 | $1.5m | — |
| Q3 2023 | 0 | — | 9 | $23.4m | — |
| Q4 2023 | 1 | $28.1k | 2 | $44.1k | — |
| Q1 2024 | 1 | $53.6k | 3 | $151.7k | — |
| Date | Insider | Trade | Value |
|---|---|---|---|
| 2024-01-18 | Erickson Gayn President and CEO, director · By Trust | Sold | $84.7k4.9k shares |
| 2024-01-18 | ROGERS VERNON Exec VP of Sales & Mktg. | Sold | $22.8k1.3k shares |
| 2024-01-18 | RICHMOND DONALD P. II CTO | Sold | $17.8k1.0k shares |
| 2024-01-16 | Erickson Gayn President and CEO, director · By Trust | Sold | $19.2k1.1k shares |
| 2024-01-16 | ROGERS VERNON Exec VP of Sales & Mktg. | Sold | $4.2k244 shares |
| 2024-01-16 | RICHMOND DONALD P. II CTO | Sold | $3.1k180 shares |
| 2024-01-12 | Ray-Chaudhuri Avijit K. Executive VP of R&D | Bought | $53.6k3.0k shares |
Their holding: how much the trade added to or took from the insider's holding (direct, or the trust or fund named). The same trade is sometimes reported by more than one insider, such as a fund and the director who represents it; totals count it once. A value is left blank where the reported price is far from the market price (usually a typo).
Holders, Q1 2024
| Manager | Shares | Change |
|---|---|---|
| VANGUARD GROUP INC 0.00% of their portfolio | 2.1m $26.0m | Added +589.0k |
| BlackRock Inc. 0.00% of their portfolio | 2.0m $25.2m | Reduced -42.3k |
| AWM Investment Company, Inc. 2.00% of their portfolio | 1.2m $15.2m | Added +642 |
| MORGAN STANLEY 0.00% of their portfolio | 1.2m $15.2m | Added +773.7k |
| AMERIPRISE FINANCIAL INC 0.00% of their portfolio | 1.1m $14.1m | Added +176.6k |
| BANK OF MONTREAL /CAN/ 0.01% of their portfolio | 1.0m $16.9m | Added +1.0m |
| OBERWEIS ASSET MANAGEMENT INC/ 0.87% of their portfolio | 967.9k $12.0m | Reduced -123.3k |
| BAILLIE GIFFORD & CO 0.01% of their portfolio | 828.6k $10.3m | Added +166.3k |
| NOMURA HOLDINGS INC 0.08% of their portfolio | 811.0k $10.1m | New |
| Halter Ferguson Financial Inc. 6.03% of their portfolio | 625.7k $7.8m | Added +304.0k |
| GEODE CAPITAL MANAGEMENT, LLC 0.00% of their portfolio | 609.1k $7.6m | Added +16.2k |
| STATE STREET CORP 0.00% of their portfolio | 562.5k $7.0m | Added +7.8k |
| Weiss Asset Management LP 0.32% of their portfolio | 559.8k $6.9m | Added +14.8k |
| FMR LLC 0.00% of their portfolio | 333.6k $4.1m | Added +198 |
| Amitell Capital Pte Ltd 3.42% of their portfolio | 325.7k $4.0m | New |
| NORTHERN TRUST CORP 0.00% of their portfolio | 247.6k $3.1m | Reduced -4.7k |
| DIMENSIONAL FUND ADVISORS LP 0.00% of their portfolio | 233.4k $2.9m | Reduced -259.7k |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC 0.00% of their portfolio | 212.1k $2.6m | Added +2.4k |
| WELLINGTON MANAGEMENT GROUP LLP 0.00% of their portfolio | 199.6k $2.5m | New |
| GSA CAPITAL PARTNERS LLP 0.17% of their portfolio | 169.1k $2.1m | Added +131.4k |
| NEXT CENTURY GROWTH INVESTORS LLC 0.18% of their portfolio | 165.3k $2.0m | Reduced -3.4k |
| ROYCE & ASSOCIATES LP 0.02% of their portfolio | 161.8k $2.0m | Added +56.5k |
| GOLDMAN SACHS GROUP INC 0.00% of their portfolio | 149.2k $1.8m | Added +68.9k |
| SILVERCREST ASSET MANAGEMENT GROUP LLC 0.01% of their portfolio | 148.4k $1.8m | Added +6.4k |
| BANK OF AMERICA CORP /DE/ 0.00% of their portfolio | 144.2k $1.8m | Added +132.8k |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP 0.00% of their portfolio | 130.0k $1.6m | Added +17.6k |
| FEDERATED HERMES, INC. 0.00% of their portfolio | 126.5k $1.6m | New |
| BARCLAYS PLC 0.00% of their portfolio | 125.9k $1.6m | Added +78.9k |
| Pier Capital, LLC 0.20% of their portfolio | 119.6k $1.5m | New |
| JANE STREET GROUP, LLC 0.00% of their portfolio | 118.6k $1.5m | Reduced -37.7k |
| Bank of New York Mellon Corp 0.00% of their portfolio | 95.1k $1.2m | Reduced -102.0k |
| CITADEL ADVISORS LLC 0.00% of their portfolio | 94.7k $1.2m | Reduced -172.7k |
| KENNEDY CAPITAL MANAGEMENT LLC 0.02% of their portfolio | 91.6k $1.1m | New |
| AQR CAPITAL MANAGEMENT LLC 0.00% of their portfolio | 91.1k $1.1m | Added +71.0k |
| MILLENNIUM MANAGEMENT LLC 0.00% of their portfolio | 91.1k $1.1m | Reduced -284.0k |
| Nuveen Asset Management, LLC 0.00% of their portfolio | 90.7k $1.1m | Reduced -48.7k |
| STATE OF WISCONSIN INVESTMENT BOARD 0.00% of their portfolio | 88.0k $1.1m | Added +18.5k |
| IMC-Chicago, LLC 0.04% of their portfolio | 84.1k $1.0m | New |
| RICE HALL JAMES & ASSOCIATES, LLC 0.05% of their portfolio | 77.3k $958.4k | New |
| Walleye Capital LLC 0.01% of their portfolio | 76.7k $951.3k | New |
| Symmetry Investments LP 0.09% of their portfolio | 69.9k $867.2k | Reduced -241.5k |
| JPMORGAN CHASE & CO 0.00% of their portfolio | 67.4k $835.5k | Reduced -4.6k |
| UBS Group AG 0.00% of their portfolio | 62.8k $779.3k | Reduced -1.2k |
| Bouvel Investment Partners, LLC 0.29% of their portfolio | 54.6k $677.0k | Added +25.2k |
| Swiss National Bank 0.00% of their portfolio | 53.9k $668.4k | Unchanged |
| D. E. Shaw & Co., Inc. 0.00% of their portfolio | 52.4k $650.3k | Reduced -275.4k |
| OSAIC HOLDINGS, INC. 0.00% of their portfolio | 49.6k $614.4k | Reduced -76.8k |
| GENERAL AMERICAN INVESTORS CO INC 0.05% of their portfolio | 49.5k $613.8k | Reduced -50.0k |
| HERITAGE INVESTORS MANAGEMENT CORP 0.02% of their portfolio | 48.4k $600.0k | Unchanged |
| TWO SIGMA INVESTMENTS, LP 0.00% of their portfolio | 46.8k $580.2k | New |
| AVIVA PLC 0.00% of their portfolio | 44.5k $551.7k | Added +21.0k |
| SIMPLEX TRADING, LLC 0.01% of their portfolio | 39.4k $488.0k | Added +1.7k |
| Jefferies Financial Group Inc. 0.01% of their portfolio | 39.3k $487.0k | Added +21.9k |
| ALGERT GLOBAL LLC 0.02% of their portfolio | 38.7k $479.8k | Reduced -14.5k |
| RHUMBLINE ADVISERS 0.00% of their portfolio | 37.9k $469.9k | Reduced -576 |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC 0.00% of their portfolio | 33.6k $416.2k | Unchanged |
| Centiva Capital, LP 0.02% of their portfolio | 31.7k $393.6k | Reduced -24.5k |
| Russell Investments Group, Ltd. 0.00% of their portfolio | 29.9k $371.0k | Reduced -36.7k |
| Inspire Investing, LLC 0.04% of their portfolio | 29.0k $359.2k | Added +14.4k |
| CALIFORNIA STATE TEACHERS RETIREMENT SYSTEM 0.00% of their portfolio | 28.0k $346.6k | Reduced -985 |
| GROUP ONE TRADING LLC 0.01% of their portfolio | 27.8k $345.0k | Reduced -203.4k |
| Graham Capital Management, L.P. 0.01% of their portfolio | 27.4k $340.2k | Added +15.4k |
| CREDIT SUISSE AG/ 0.00% of their portfolio | 27.4k $340.2k | Unchanged |
| ROYAL BANK OF CANADA 0.00% of their portfolio | 27.3k $339.0k | Reduced -41.9k |
| Legal & General Group Plc 0.00% of their portfolio | 27.1k $336.3k | Reduced -2.2k |
| ARDSLEY ADVISORY PARTNERS LP 0.04% of their portfolio | 25.0k $310.0k | Added +10.0k |
| BNP PARIBAS FINANCIAL MARKETS 0.00% of their portfolio | 24.7k $306.1k | Added +6.2k |
| Campbell & CO Investment Adviser LLC 0.03% of their portfolio | 24.4k $302.5k | Reduced -10.9k |
| ALLIANCEBERNSTEIN L.P. 0.00% of their portfolio | 23.7k $294.4k | Reduced -2.8k |
| PRELUDE CAPITAL MANAGEMENT, LLC 0.02% of their portfolio | 22.0k $272.8k | Added +12.1k |
| GREENWOOD CAPITAL ASSOCIATES LLC 0.03% of their portfolio | 20.8k $258.2k | Reduced -21.3k |
| Cubist Systematic Strategies, LLC 0.00% of their portfolio | 20.3k $252.1k | Added +5.2k |
| GTS SECURITIES LLC 0.01% of their portfolio | 18.0k $222.6k | Reduced -9.3k |
| GUGGENHEIM CAPITAL LLC 0.00% of their portfolio | 17.9k $222.5k | Added +6.7k |
| WOLVERINE TRADING, LLC 0.00% of their portfolio | 17.3k $214.3k | Reduced -17.8k |
| Virtu Financial LLC 0.02% of their portfolio | 17.2k $214.0k | Reduced -3.0k |
| PRICE T ROWE ASSOCIATES INC /MD/ 0.00% of their portfolio | 16.0k $199.0k | Added +961 |
| DEUTSCHE BANK AG\ 0.00% of their portfolio | 15.8k $196.4k | Added +2.2k |
| Raymond James Financial Services Advisors, Inc. 0.00% of their portfolio | 15.4k $190.6k | Added +3.8k |
| Invesco Ltd. 0.00% of their portfolio | 14.8k $183.0k | Reduced -6.4k |
| MetLife Investment Management, LLC 0.00% of their portfolio | 13.7k $169.3k | Unchanged |
| AMERICAN INTERNATIONAL GROUP, INC. 0.00% of their portfolio | 13.6k $168.9k | Reduced -117 |
| Walleye Trading LLC 0.00% of their portfolio | 12.9k $160.3k | New |
| LPL Financial LLC 0.00% of their portfolio | 12.7k $157.3k | Reduced -61.2k |
| JANUS HENDERSON GROUP PLC 0.00% of their portfolio | 11.8k $146.1k | Unchanged |
| WELLS FARGO & COMPANY/MN 0.00% of their portfolio | 11.3k $140.3k | Reduced -19.2k |
| SHERBROOKE PARK ADVISERS LLC 0.03% of their portfolio | 10.9k $134.7k | New |
| Cetera Investment Advisers 0.00% of their portfolio | 10.8k $133.5k | New |
| FRANKLIN RESOURCES INC 0.00% of their portfolio | 10.6k $131.1k | Unchanged |
| Concentrum Wealth Management 0.06% of their portfolio | 10.5k $129.7k | Reduced -10.5k |
| Kestra Advisory Services, LLC 0.00% of their portfolio | 10.4k $129.4k | Reduced -2.2k |
| NEW YORK STATE COMMON RETIREMENT FUND 0.00% of their portfolio | 10.4k $129.3k | Reduced -80.0k |
| MANUFACTURERS LIFE INSURANCE COMPANY, THE 0.00% of their portfolio | 10.3k $127.4k | Reduced -3.9k |
| HighTower Advisors, LLC 0.00% of their portfolio | 10.2k $124.0k | New |
| Steward Partners Investment Advisory, LLC 0.00% of their portfolio | 9.4k $116.9k | Reduced -5.5k |
| B. Riley Wealth Advisors, Inc. 0.01% of their portfolio | 8.8k $402.8k | New |
| PEAK6 Investments LLC 0.01% of their portfolio | 8.6k $106.7k | New |
| PNC Financial Services Group, Inc. 0.00% of their portfolio | 8.1k $100.4k | Added +6.8k |
| US BANCORP \DE\ 0.00% of their portfolio | 5.4k $66.8k | Added +1.3k |
| CITIGROUP INC 0.00% of their portfolio | 4.8k $59.1k | Reduced -130 |