Aehr Test Systems (AEHR) Ownership
AEHR ownership summary
as of October 18, 2026- Institutions
- 76.6% of shares outstanding
- Insiders
- 3.29% of shares outstanding
- Shares outstanding
- 32.7M
- Float
- 31.3M shares available to trade
- Short interest
- 16.75% 5.2M shares short
- Days to cover
- 1.89 short interest up 2.0% vs prior month
- Institutions 76.56%
- Insiders 3.29%
- Other investors 20.16%
AEHR top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | BlackRock Inc | 8.14% | 2.7M | $161.2M | +372,643 (+16.3%) | June 30, 2026 |
| 2 | Vanguard Capital Management, LLC | 4.04% | 1.3M | $80.0M | +38,493 (+3.0%) | June 30, 2026 |
| 3 | D. E. Shaw & Co LP | 3.61% | 1.2M | $71.4M | +835,783 (+244.6%) | June 30, 2026 |
| 4 | Two Sigma Investments LLC | 3.57% | 1.2M | $70.6M | +950,242 (+443.3%) | June 30, 2026 |
| 5 | FMR Inc | 3.08% | 1.0M | $61.0M | −1.1M (−53.0%) | June 30, 2026 |
| 6 | Vanguard Portfolio Management, LLC | 2.96% | 967K | $58.6M | +48,783 (+5.3%) | June 30, 2026 |
| 7 | Geode Capital Management, LLC | 2.68% | 876K | $53.1M | +149,794 (+20.6%) | June 30, 2026 |
| 8 | The Goldman Sachs Group Inc | 2.48% | 810K | $49.1M | −452,007 (−35.8%) | June 30, 2026 |
| 9 | Jane Street Group LLC | 2.31% | 754K | $45.7M | +476,478 (+172.0%) | June 30, 2026 |
| 10 | JPMorgan Chase & Co | 2.24% | 733K | $44.4M | +542,208 (+284.9%) | June 30, 2026 |
| 11 | State Street Corp | 2.18% | 713K | $43.2M | +89,620 (+14.4%) | June 30, 2026 |
| 12 | Connor Clark & Lunn Inv Mgmt Ltd | 2.05% | 671K | $40.6M | +451,949 (+206.5%) | June 30, 2026 |
| 13 | T. Rowe Price Associates, Inc. | 1.55% | 507K | $30.7M | −842,316 (−62.4%) | June 30, 2026 |
| 14 | Morgan Stanley - Brokerage Accounts | 1.47% | 480K | $29.1M | +314,727 (+190.0%) | June 30, 2026 |
| 15 | Next Century Growth Investors LLC | 1.26% | 411K | $24.9M | −344,006 (−45.6%) | June 30, 2026 |
| 16 | Citadel Advisors Llc | 1.23% | 401K | $24.3M | +259,441 (+183.6%) | June 30, 2026 |
| 17 | Marshall Wace Asset Management Ltd | 1.17% | 383K | $23.2M | +372,527 (+3,648.3%) | June 30, 2026 |
| 18 | Awm Investment Company Inc | 1.15% | 375K | $22.7M | −1.2M (−76.5%) | June 30, 2026 |
| 19 | T. Rowe Price Investment Management,Inc. | 0.97% | 318K | $19.3M | +318,127 (0.0%) | June 30, 2026 |
| 20 | Amvescap Plc. | 0.91% | 296K | $18.0M | +10,501 (+3.7%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 5.2M shares and 5 cut 4.0M.
AEHR top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Vanguard MStar Total Stk Mkt Idx Invest | 2.92% | 953K | $57.8M | −1,320 (−0.1%) | August 31, 2026 |
| 2 | iShares Russell 2000 ETF | 2.52% | 823K | $49.9M | −9,472 (−1.1%) | September 30, 2026 |
| 3 | Vanguard Information Technology ETF | 2.18% | 713K | $43.2M | +1,642 (+0.2%) | September 30, 2026 |
| 4 | Fidelity Small Cap Growth | 2.01% | 656K | $39.8M | −4,161 (−0.6%) | July 31, 2026 |
| 5 | Fidelity Small Cap Growth K6 | 1.06% | 347K | $21.0M | +10,320 (+3.1%) | July 31, 2026 |
| 6 | Fidelity Small Cap Index | 1.03% | 335K | $20.3M | +2,880 (+0.9%) | July 31, 2026 |
| 7 | iShares Russell 2000 Growth ETF | 0.91% | 297K | $18.0M | −376 (−0.1%) | September 30, 2026 |
| 8 | Lord Abbett Developing Growth A | 0.66% | 214K | $13.0M | −8,314 (−3.7%) | August 31, 2026 |
| 9 | JPMorgan Small Cap Growth A | 0.64% | 208K | $12.6M | −6,130 (−2.9%) | August 31, 2026 |
| 10 | Invesco Dorsey Wright Technology MomtETF | 0.62% | 203K | $12.3M | — | September 30, 2026 |
| 11 | T. Rowe Price New Horizons | 0.57% | 187K | $11.4M | −59,700 (−24.2%) | September 30, 2026 |
| 12 | Vanguard Russell 2000 ETF | 0.57% | 185K | $11.2M | +8,601 (+4.9%) | September 30, 2026 |
| 13 | Schwab US Small-Cap ETF™ | 0.49% | 161K | $9.8M | +108 (+0.1%) | September 30, 2026 |
| 14 | T. Rowe Price Small-Cap Value | 0.47% | 152K | $9.2M | +113,300 (+292.8%) | September 30, 2026 |
| 15 | Fidelity Extended Market Index | 0.45% | 146K | $8.9M | +195 (+0.1%) | August 31, 2026 |
| 16 | Berkshire Focus | 0.44% | 143K | $8.6M | +142,640 (0.0%) | June 30, 2026 |
| 17 | Edinburgh Worldwide Ord | 0.35% | 115K | $7.0M | — | June 30, 2026 |
| 18 | iShares Automation&Robotics ETF USD Acc | 0.29% | 93K | $5.7M | — | September 30, 2026 |
| 19 | Fidelity® SAI Small-Mid Cap Momt Idx | 0.28% | 91K | $5.5M | +3,116 (+3.5%) | August 31, 2026 |
| 20 | T. Rowe Price Small-Cap Stock | 0.26% | 86K | $5.2M | −495 (−0.6%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
AEHR insider transactions
latest 20| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-04-22 | Rhea J Posedel | Sell | $100.00 | 17,115 | $1.7M |
| 2026-04-22 | Rhea J Posedel | Sell | $95.00 | 604 | $57,380 |
| 2026-04-22 | Alistair N Sporck | Sell | $93.50 | 2,000 | $187,000 |
| 2026-04-21 | Rhea J Posedel | Sell | $96.02 | 8,787 | $843,728 |
| 2026-04-20 | Alberto Salamone | Sell | $89.57 | 15,000 | $1.3M |
| 2026-04-20 | Rhea J Posedel | Sell | $88.09 | 7,500 | $660,675 |
| 2026-04-17 | Howard T Slayen | Sell | $85.00 | 25,000 | $2.1M |
| 2026-04-17 | Rhea J Posedel | Sell | $82.00 | 7,500 | $615,000 |
| 2026-04-16 | Fariba Danesh | Sell | $82.63 | 8,000 | $661,040 |
| 2026-04-16 | Rhea J Posedel | Sell | $80.72 | 15,000 | $1.2M |
| 2026-04-16 | Laura Oliphant | Sell | $85.59 | 4,665 | $399,277 |
| 2026-04-16 | Laura Oliphant | Sell | $81.54 | 1,716 | $139,923 |
| 2026-04-16 | Alistair N Sporck | Sell | $81.88 | 2,000 | $163,760 |
| 2026-04-15 | Didier Wimmers | Sell | $72.02 | 1,900 | $136,838 |
| 2026-04-14 | Donald P Richmond II | Sell | $73.18 | 17,011 | $1.2M |
| 2026-04-13 | Didier Wimmers | Sell | $71.11 | 3,500 | $248,885 |
| 2026-04-13 | Fariba Danesh | Sell | $71.49 | 7,000 | $500,430 |
| 2026-04-10 | Alistair N Sporck | Sell | $67.36 | 2,000 | $134,720 |
| 2026-04-10 | Gayn Erickson | Sell | $70.58 | 96,036 | $6.8M |
| 2026-04-10 | Gayn Erickson | Sell | $70.58 | 56,788 | $4.0M |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
AEHR shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns AEHR
Institutional investors own 76.6% of Aehr Test Systems's shares and insiders 3.29%. The largest holder is BlackRock Inc with 8.14% of the shares (2.7M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 5 reduced their stake in the latest filings. Short interest is 16.75% of the float, or 1.89 days of average trading volume. The share count rose 156.3% since 2014.
Related: AEHR analyst forecast, AEHR key metrics. See the AEHR stock overview for the latest quote and news.
AEHR ownership FAQ
Who owns the most Aehr Test Systems stock?
The largest shareholders of Aehr Test Systems are BlackRock Inc (8.14%), Vanguard Capital Management, LLC (4.04%), D. E. Shaw & Co LP (3.61%), Two Sigma Investments LLC (3.57%), FMR Inc (3.08%).
What percentage of Aehr Test Systems is owned by institutions?
Institutions hold 76.6% of Aehr Test Systems's shares outstanding; insiders hold 3.29%.
Which funds own Aehr Test Systems?
The largest fund holders of Aehr Test Systems are Vanguard MStar Total Stk Mkt Idx Invest (2.92%), iShares Russell 2000 ETF (2.52%), Vanguard Information Technology ETF (2.18%), Fidelity Small Cap Growth (2.01%), Fidelity Small Cap Growth K6 (1.06%).
What is Aehr Test Systems's short interest?
5.2M shares of Aehr Test Systems were sold short, 16.75% of the float; at the average daily volume it would take 1.89 days to cover.
Are insiders buying or selling Aehr Test Systems?
Of the latest 20 reported insider transactions in Aehr Test Systems (since April 10, 2026), 0 were purchases and 20 were sales.
How many shares of Aehr Test Systems are outstanding?
Aehr Test Systems has 32.7M shares outstanding, of which 31.3M are in the public float.