Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
180 institutional managers reported holding AEHR for the quarter ended Mar 31, 2026. Together they hold about 73% of shares outstanding; the top 10 hold 46%. 54 opened new positions; 22 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Vanguard Group | 2.45M | 7.98% | $90.9M | added +4.8% | 2014 Q1 |
| BlackRock | 2.29M | 7.45% | $84.8M | added +7.5% | 2015 Q2 |
| FMR (Fidelity) | 2.14M | 6.98% | $79.5M | trimmed -14.6% | 2021 Q4 |
| AWM Investment Company, INC. | 1.59M | 5.19% | $59.1M | added +3.7% | 2016 Q3 |
| T. Rowe Price | 1.35M | 4.40% | $50.1M | added +3824.4% | 2023 Q2 |
| Goldman Sachs | 1.26M | 4.11% | $46.8M | added +616.9% | 2022 Q1 |
| Baillie Gifford | 1.00M | 3.26% | $37.1M | trimmed -22.4% | 2023 Q3 |
| Next Century Growth Investors LLC | 754.7k | 2.46% | $28.0M | added +36.6% | 2025 Q3 |
| Geode Capital | 725.7k | 2.36% | $26.9M | added +5.8% | ≤2013 |
| State Street | 623.3k | 2.03% | $23.1M | unchanged | 2021 Q3 |
| William Blair Investment Management, LLC | 513.3k | 1.67% | $19.0M | added +3.6% | 2025 Q3 |
| Gilder Gagnon Howe & CO LLC | 444.3k | 1.45% | $16.5M | added +39.7% | 2025 Q3 |
| Silvercrest Asset Management Group LLC | 344.2k | 1.12% | $12.8M | added +11.6% | 2021 Q4 |
| D. E. Shaw | 341.6k | 1.11% | $12.7M | added +17.7% | 2025 Q3 |
| Invesco | 285.7k | 0.93% | $10.6M | added +912.5% | 2022 Q4 |
| UBS | 281.1k | 0.92% | $10.4M | added +3.3% | 2021 Q2 |
| Walleye Capital LLC | 279.2k | 0.91% | $10.4M | added +5831.2% | 2025 Q3 |
| Jane Street | 277.0k | 0.90% | $10.3M | added +15.2% | 2021 Q1 |
| Rice Hall James & Associates, LLC | 272.3k | 0.89% | $10.1M | trimmed -40% | 2024 Q1 |
| Northern Trust | 252.2k | 0.82% | $9.4M | added +5.1% | 2017 Q1 |
| Charles Schwab Investment Management | 235.5k | 0.77% | $8.7M | trimmed -1.2% | 2021 Q4 |
| Connor, Clark & Lunn Investment Management LTD. | 218.8k | 0.71% | $8.1M | opened | 2026 Q1 |
| Two Sigma | 214.4k | 0.70% | $8.0M | trimmed -39.7% | 2024 Q1 |
| Susquehanna International Group | 202.0k | 0.66% | $7.5M | added +81.6% | 2021 Q3 |
| Lord, Abbett & CO. LLC | 179.3k | 0.58% | $6.7M | opened | 2026 Q1 |
| Bard Associates INC | 179.1k | 0.58% | $6.6M | unchanged | 2025 Q2 |
| Morgan Stanley | 165.7k | 0.54% | $6.1M | trimmed -32.3% | 2014 Q1 |
| Wellington Management | 152.9k | 0.50% | $5.7M | trimmed -81.6% | 2024 Q1 |
| Citadel Advisors | 141.3k | 0.46% | $5.2M | trimmed -36% | 2025 Q3 |
| Pier Capital, LLC | 127.0k | 0.41% | $4.7M | trimmed -40% | 2022 Q4 |
| Osaic Holdings, INC. | 105.0k | 0.34% | $3.9M | added +6.3% | 2020 Q3 |
| Millennium Management | 95.8k | 0.31% | $3.6M | added +61.8% | 2025 Q3 |
| ExodusPoint | 93.6k | 0.30% | $3.5M | opened | 2025 Q3 |
| Dimensional Fund Advisors | 93.0k | 0.30% | $3.5M | trimmed -14.7% | 2018 Q3 |
| BNY Mellon | 89.4k | 0.29% | $3.3M | unchanged | 2017 Q1 |
| Kultura Capital Management LP (focused) | 80.2k | 0.26% | $3.0M | opened | 2026 Q1 |
| Penbrook Management LLC | 79.5k | 0.26% | $3.0M | trimmed -30.8% | 2023 Q4 |
| Polen Capital | 79.4k | 0.26% | $2.9M | added +163.7% | 2025 Q2 |
| Kennedy Capital Management LLC | 76.0k | 0.25% | $2.8M | trimmed -78.9% | 2025 Q2 |
| Raymond James Financial INC | 75.2k | 0.24% | $2.8M | added +490.6% | 2016 Q3 |
| Klcm Advisors, INC. | 75.0k | 0.24% | $2.8M | unchanged | 2024 Q3 |
| Bouvel Investment Partners, LLC | 71.8k | 0.23% | $2.7M | added +33.5% | 2023 Q4 |
| Nuveen | 70.4k | 0.23% | $2.6M | added +1.8% | 2023 Q2 |
| Johnson Investment Counsel INC | 68.9k | 0.22% | $2.6M | opened | 2026 Q1 |
| NEW York State Common Retirement Fund | 61.6k | 0.20% | $2.3M | added +30.9% | 2021 Q3 |
| Kestra Advisory Services, LLC | 60.1k | 0.20% | $2.2M | unchanged | 2024 Q4 |
| Royal Bank OF Canada | 59.9k | 0.20% | $2.2M | added +15.3% | 2021 Q3 |
| Swiss National Bank | 57.5k | 0.19% | $2.1M | added +2.1% | 2025 Q4 |
| Bank OF America CORP /DE/ | 56.8k | 0.18% | $2.1M | trimmed -19.6% | 2022 Q4 |
| Barclays PLC | 52.2k | 0.17% | $1.9M | added +17.7% | 2021 Q3 |
Largest 50 of 180 shown; the full ranked, searchable register is at boothcheck.com/holders/AEHR. Related filers are grouped using the filings' own included-manager declarations. Historically, several managers opening new positions in the same quarter said almost nothing about the quarter that followed (59,118 cases since 2013). A filed record, not a forecast. Nothing here is investment advice.