Aehr Test Systems 13F holders
262 funds reported a position in Aehr Test Systems in their 13F for the quarter ended 30 June 2026, together 23.3 million shares worth $2.23 billion. Against the quarter before, 96 opened a position, 74 added, 70 trimmed and 30 sold out; together they bought a net 769,960 shares. The largest holders: BlackRock, Inc., Vanguard Capital Management LLC and D. E. Shaw & Co., Inc.
Funds holding262+71 on Q1 2026
Shares they held23.3Mworth $2.23 billion
Net bought on the quarter769,960 sharesabout $73.9 million at the funds' values
Funds buying to selling170 to 100opened or added, to cut or sold
Opened 96Added 74Held 18Trimmed 70Sold out 30
What each fund did in AEHR against its 13F for the quarter before; a change under 0.1% of a holding counts as held
Funds reporting a position in AEHR in their 13F, each quarter; hover a bar for the shares they held
Filed so far for the quarter to 30 September 2026
2,671 funds have filed their 13F for the quarter so far; the rest are due by 16 November 2026. Of those, 47 reported a position in Aehr Test Systems: 12 opened one, 16 added, 10 trimmed and 4 sold out, a net 110,215 shares bought.
The largest moves in the name among the funds that have filed, against each fund's previous 13F.
The well-known funds
Of the 44 funds followed here, 7 reported a position in Aehr Test Systems in a 13F for the quarter ended 30 June 2026. The largest: Two Sigma Investments, 1.2 million shares worth $111.9 million, 0.1% of its reported book. New this quarter: Renaissance Technologies. Sold out: Bridgewater Associates. In the quarter, 5 funds added or opened a position and 3 trimmed or sold out; together they sold a net 433,794 shares, about $41.7 million at the funds' own value per share on 30 June 2026. A change under 0.1% of a holding counts as held.
| Fund | Shares | Value | Of its book | Change on the quarter | Status | Quarter ended | Filing |
|---|---|---|---|---|---|---|---|
| Two Sigma Investments | 1,164,614 | $111.9 million | 0.1% | +950,242 | added | 30 June 2026 | 13F |
| FMR LLC | 1,006,830 | $96.7 million | 0.0% | -1,135,809 | trimmed | 30 June 2026 | 13F |
| Geode Capital Management | 875,505 | $84.1 million | 0.0% | +149,794 | added | 30 June 2026 | 13F |
| Citadel Advisors | 400,732 | $38.5 million | 0.0% | +259,441 | added | 30 June 2026 | 13F |
| Baillie Gifford | 203,878 | $19.6 million | 0.0% | -797,140 | trimmed | 30 June 2026 | 13F |
| Renaissance Technologies | 134,500 | $12.9 million | 0.0% | +134,500 | new | 30 June 2026 | 13F |
| Millennium Management | 108,877 | $10.5 million | 0.0% | +13,051 | added | 30 June 2026 | 13F |
| Bridgewater Associates | 0 | $0 | 0.0% | -7,873 | exited | 30 June 2026 | 13F |
Value is what the fund reported.
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Change is shares against the fund's previous 13F; a fund with one filing read shows no change. 13Fs cover long US positions of managers above $100 million and are filed up to 45 days after the quarter.The largest holders
| Fund | Shares | Share of all | Value | Of its book | Change in shares | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 2,659,542 | 11.43% | $255.5 million | 0.00% | +372,643 | 13F |
| Vanguard Capital Management LLC | 1,320,350 | 5.68% | $126.8 million | 0.00% | +38,493 | 13F |
| D. E. Shaw & Co., Inc. | 1,177,421 | 5.06% | $113.1 million | 0.07% | +835,783 | 13F |
| Two Sigma Investments, LP | 1,164,614 | 5.01% | $111.9 million | 0.09% | +950,242 | 13F |
| FMR LLC | 1,006,830 | 4.33% | $96.7 million | 0.00% | -1,135,809 | 13F |
| Vanguard Portfolio Management LLC | 966,659 | 4.16% | $92.9 million | 0.00% | +48,783 | 13F |
| Geode Capital Management, LLC | 875,505 | 3.76% | $84.1 million | 0.00% | +149,794 | 13F |
| Goldman Sachs Group Inc. | 810,036 | 3.48% | $77.8 million | 0.01% | -452,007 | 13F |
| Jane Street Group, LLC | 753,523 | 3.24% | $72.4 million | 0.05% | +476,478 | 13F |
| JPMorgan Chase & Co. | 732,547 | 3.15% | $69.6 million | 0.00% | +542,208 | 13F |
| State Street Corp. | 712,926 | 3.06% | $68.5 million | 0.00% | +89,620 | 13F |
| Connor, Clark & Lunn Investment Management Ltd. | 670,758 | 2.88% | $64.4 million | 0.12% | +451,949 | 13F |
| Price T Rowe Associates Inc. | 507,035 | 2.18% | $48.7 million | 0.01% | -842,316 | 13F |
| Morgan Stanley | 480,400 | 2.07% | $46.1 million | 0.00% | +314,727 | 13F |
| Next Century Growth Investors LLC | 410,731 | 1.77% | $39.5 million | 2.09% | -344,006 | 13F |
| Citadel Advisors LLC | 400,732 | 1.72% | $38.5 million | 0.02% | +259,441 | 13F |
| Marshall Wace, LLP | 382,738 | 1.65% | $36.8 million | 0.03% | +372,527 | 13F |
| AWM Investment Company, Inc. | 374,808 | 1.61% | $36.0 million | 3.12% | -1,219,163 | 13F |
| T. Rowe Price Investment Management, Inc. | 318,127 | 1.37% | $30.6 million | 0.02% | new | 13F |
| Invesco Ltd. | 296,226 | 1.27% | $28.5 million | 0.00% | +10,501 | 13F |
| Northern Trust Corp. | 277,020 | 1.19% | $26.6 million | 0.00% | +24,862 | 13F |
| Charles Schwab Investment Management Inc. | 249,512 | 1.07% | $24.0 million | 0.00% | +13,973 | 13F |
| Science & Technology Partners, L.P. | 249,000 | 1.07% | $23.9 million | 4.03% | new | 13F |
| Lord, Abbett & Co. LLC | 247,640 | 1.06% | $23.8 million | 0.07% | +68,351 | 13F |
| Wellington Management Group LLP | 238,453 | 1.03% | $22.9 million | 0.00% | +85,568 | 13F |
| Driehaus Capital Management LLC | 238,422 | 1.02% | $22.9 million | 0.13% | new | 13F |
| Vanguard Fiduciary Trust Co. | 212,881 | 0.92% | $20.4 million | 0.01% | +15,715 | 13F |
| Tudor Investment Corp. Et Al | 204,550 | 0.88% | $19.6 million | 0.08% | +156,357 | 13F |
| Baillie Gifford & Co. | 203,878 | 0.88% | $19.6 million | 0.02% | -797,140 | 13F |
| Trexquant Investment LP | 201,892 | 0.87% | $19.4 million | 0.12% | new | 13F |
| UBS Group AG | 169,123 | 0.73% | $16.2 million | 0.00% | -77,640 | 13F |
| Neuberger Berman Group LLC | 167,664 | 0.72% | $16.1 million | 0.01% | new | 13F |
| Bard Associates Inc. | 156,900 | 0.67% | $15.1 million | 3.35% | -22,227 | 13F |
| Kadensa Capital Ltd | 155,299 | 0.67% | $14.9 million | 3.18% | new | 13F |
| Penn Capital Management Company, LLC | 150,547 | 0.65% | $14.5 million | 0.92% | new | 13F |
| BNP Paribas Financial Markets | 145,612 | 0.63% | $14.0 million | 0.01% | +139,295 | 13F |
| Berkshire Capital Holdings Inc. | 142,640 | 0.61% | $13.7 million | 2.96% | new | 13F |
| New York State Common Retirement Fund | 138,047 | 0.59% | $13.3 million | 0.02% | +76,465 | 13F |
| Renaissance Technologies LLC | 134,500 | 0.58% | $12.9 million | 0.02% | new | 13F |
| Bank of America Corp. | 121,056 | 0.52% | $11.6 million | 0.00% | +64,256 | 13F |
| Kultura Capital Management LP | 117,865 | 0.51% | $11.3 million | 5.20% | +37,665 | 13F |
| Millennium Management LLC | 108,877 | 0.47% | $10.5 million | 0.01% | +13,051 | 13F |
| Nuveen, LLC | 102,621 | 0.44% | $9.9 million | 0.00% | +32,264 | 13F |
| Barclays PLC | 101,249 | 0.44% | $9.7 million | 0.00% | +49,035 | 13F |
| Gilder Gagnon Howe & Co. LLC | 100,204 | 0.43% | $9.6 million | 0.10% | -344,092 | 13F |
| Bank of New York Mellon Corp | 93,571 | 0.40% | $9.0 million | 0.00% | +4,166 | 13F |
| Dimensional Fund Advisors LP | 93,404 | 0.40% | $9.0 million | 0.00% | +367 | 13F |
| Rice Hall James & Associates, LLC | 87,546 | 0.38% | $8.4 million | 0.41% | -184,706 | 13F |
| Raymond James Financial Inc. | 86,773 | 0.37% | $8.3 million | 0.00% | +11,529 | 13F |
| Algert Global LLC | 82,275 | 0.35% | $7.9 million | 0.09% | new | 13F |
The 50 largest of the 262 funds that reported a position in AEHR in their 13F for the quarter ended 30 June 2026, by the value each reported.
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Share of all is the fund's part of all the shares the funds reported. Change is shares against the fund's 13F for the quarter before. A 13F lists a manager's long positions in US-listed shares at the quarter's end. What is a 13F?Options the funds reported on AEHR
| Fund | Option | Shares under the options | Value of those shares | Quarter ended | Filing |
|---|---|---|---|---|---|
| Citadel Advisors | Puts | 743,000 | $71.4 million | 30 June 2026 | 13F |
| Citadel Advisors | Calls | 632,400 | $60.7 million | 30 June 2026 | 13F |
| Point72 Asset Management | Calls | 116,300 | $11.2 million | 30 June 2026 | 13F |
| Point72 Asset Management | Puts | 103,600 | $10.0 million | 30 June 2026 | 13F |
| Two Sigma Investments | Puts | 9,800 | $941,388 | 30 June 2026 | 13F |
| Two Sigma Investments | Calls | 6,700 | $643,602 | 30 June 2026 | 13F |
A 13F lists calls and puts by the shares they cover and what those shares were worth at the quarter's end, not what the options cost.
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They are not counted in the holdings above. A put gains when the stock falls, a call when it rises, and a fund may hold either to hedge.Schedule 13D and 13G filed on the name, last twelve months
| Filed | Schedule | Who | Holding | Of the class | Event date | Rule or purpose | Filing |
|---|---|---|---|---|---|---|---|
| 14 August 2026 | 13G/A | AWM Investment Company, Inc. and 1 other | 374,808 | 1.1% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 6 August 2026 | 13G/A | FMR LLC and 3 others | 1.0 million | 3.2% | 30 June 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 29 July 2026 | 13G | Jane Street Group, LLC and 5 others | 1.6 million | 5.1% | 24 July 2026 | passive, under 20% (13d-1(c)) | EDGAR |
| 6 May 2026 | 13G/A | FMR LLC and 3 others | 2.1 million | 7.0% | 31 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 26 March 2026 | 13G/A | The Vanguard Group and 1 other | 0 | 0.0% | 13 March 2026 | passive, institutional (13d-1(b)) | EDGAR |
| 9 February 2026 | 13G/A | Baillie Gifford & Co and 1 other | 1.3 million | 4.3% | 31 December 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 10 November 2025 | 13G/A | Baillie Gifford & Co and 1 other | 1.5 million | 5.1% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
| 5 November 2025 | 13G/A | FMR LLC and 3 others | 2.7 million | 9.0% | 30 September 2025 | passive, institutional (13d-1(b)) | EDGAR |
A Schedule 13D is filed by anyone who crosses 5% of a class with intent to influence; a 13G by a passive holder.
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Amendments (/A) report a change, including an exit to zero. Holding and percentage are as the filer stated them on the cover page; the purpose is the filer's own words, cut short. 13D and 13GFails to deliver
| Settlement date | Shares failed | Price | File |
|---|---|---|---|
| 30 September 2026 | 369 | $100.78 | SEC |
| 28 September 2026 | 461 | $104.39 | SEC |
| 23 September 2026 | 12 | $100.60 | SEC |
| 22 September 2026 | 402 | $96.93 | SEC |
| 21 September 2026 | 600 | $93.49 | SEC |
| 11 September 2026 | 14,065 | $93.81 | SEC |
| 8 September 2026 | 100 | $86.26 | SEC |
| 31 August 2026 | 405 | $80.81 | SEC |
| 24 August 2026 | 812 | $101.73 | SEC |
| 17 August 2026 | 700 | $134.06 | SEC |
Shares that failed to deliver at settlement, per day, from the SEC's half-month files, which arrive about two weeks after the period.