Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
553 institutional managers reported holding AEIS for the quarter ended Mar 31, 2026. Reported positions total over 95% of shares outstanding; the top 10 hold 51%. 148 opened new positions; 51 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| BlackRock | 6.47M | 15.33% | $2.09B | added +6.3% | ≤2013 |
| Vanguard Group | 4.35M | 10.30% | $1.40B | trimmed -8.4% | ≤2013 |
| Invesco | 1.83M | 4.34% | $591.1M | added +16.4% | ≤2013 |
| FMR (Fidelity) | 1.59M | 3.76% | $511.8M | trimmed -15.3% | 2017 Q4 |
| State Street | 1.45M | 3.44% | $468.1M | trimmed -5.6% | 2015 Q4 |
| Ameriprise Financial INC | 1.31M | 3.11% | $422.7M | trimmed -20.2% | ≤2013 |
| Earnest Partners LLC | 1.23M | 2.91% | $395.6M | trimmed -12.9% | 2015 Q3 |
| Geode Capital | 1.12M | 2.65% | $361.3M | added +17.1% | ≤2013 |
| Bank OF America CORP /DE/ | 1.06M | 2.52% | $342.3M | added +16.6% | ≤2013 |
| Whale Rock Capital (focused) | 1.02M | 2.42% | $329.7M | opened | 2026 Q1 |
| Dimensional Fund Advisors | 652.1k | 1.54% | $210.3M | trimmed -3.9% | ≤2013 |
| Gw&k Investment Management, LLC | 601.1k | 1.42% | $193.9M | trimmed -11.8% | 2024 Q2 |
| Neuberger Berman Group LLC | 583.3k | 1.38% | $188.2M | trimmed -22.6% | 2022 Q1 |
| Franklin Resources | 532.5k | 1.26% | $171.8M | added +9.2% | 2025 Q2 |
| Principal Financial Group INC | 505.6k | 1.20% | $163.1M | trimmed -12.9% | ≤2013 |
| BNP Paribas Financial Markets | 495.6k | 1.17% | $159.9M | added +48.3% | 2014 Q2 |
| Northern Trust | 480.9k | 1.14% | $155.1M | added +19% | ≤2013 |
| Goldman Sachs | 469.9k | 1.11% | $151.6M | trimmed -11.8% | ≤2013 |
| Fuller & Thaler Asset Management, INC. | 469.9k | 1.11% | $151.6M | added +9.9% | 2017 Q4 |
| AllianceBernstein | 457.5k | 1.08% | $147.6M | trimmed -18.8% | ≤2013 |
| Charles Schwab Investment Management | 417.8k | 0.99% | $134.8M | trimmed -11.4% | ≤2013 |
| MFS Investment Management | 406.2k | 0.96% | $131.0M | trimmed -28.3% | 2020 Q3 |
| Wellington Management | 387.5k | 0.92% | $125.0M | trimmed -9.4% | 2025 Q3 |
| Fisher Investments | 344.2k | 0.82% | $111.0M | trimmed -12.7% | 2015 Q3 |
| Loomis Sayles & CO L P | 336.4k | 0.80% | $108.5M | trimmed -31.3% | 2015 Q1 |
| Arrowstreet Capital | 335.6k | 0.80% | $108.2M | added +17% | 2025 Q3 |
| Analog Century Management LP (focused) | 324.7k | 0.77% | $104.7M | trimmed -30% | 2025 Q3 |
| Morgan Stanley | 316.5k | 0.75% | $102.1M | trimmed -19.2% | ≤2013 |
| Silvercrest Asset Management Group LLC | 304.2k | 0.72% | $98.1M | trimmed -20.5% | 2024 Q4 |
| Millennium Management | 303.2k | 0.72% | $97.8M | added +50.6% | ≤2013 |
| BNY Mellon | 281.6k | 0.67% | $90.8M | added +9% | ≤2013 |
| UBS | 276.1k | 0.65% | $89.0M | trimmed -2.7% | ≤2013 |
| Bamco INC /NY/ | 268.7k | 0.64% | $86.7M | trimmed -10.2% | 2019 Q4 |
| NEW York State Common Retirement Fund | 266.6k | 0.63% | $86.0M | trimmed -3.7% | ≤2013 |
| Snyder Capital Management L P | 263.4k | 0.62% | $84.9M | trimmed -18.5% | 2021 Q2 |
| T. Rowe Price | 254.4k | 0.60% | $82.1M | added +262.7% | ≤2013 |
| T. Rowe Price Investment Management, INC. | 231.2k | 0.55% | $74.6M | added +476.7% | 2025 Q3 |
| Channing Capital Management, LLC | 230.5k | 0.55% | $74.4M | trimmed -22.5% | 2023 Q4 |
| Manufacturers Life Insurance Company, THE | 227.9k | 0.54% | $73.5M | trimmed -25.3% | ≤2013 |
| SEI Investments CO | 223.3k | 0.53% | $72.0M | added +9.7% | 2016 Q4 |
| TD Asset Management INC | 215.1k | 0.51% | $69.4M | added +2483.4% | 2025 Q3 |
| Congress Asset Management CO | 207.4k | 0.49% | $66.9M | trimmed -8.6% | 2025 Q4 |
| AQR Capital | 204.0k | 0.48% | $65.8M | added +566.9% | 2025 Q1 |
| Envestnet Asset Management INC | 203.9k | 0.48% | $65.8M | trimmed -17.7% | ≤2013 |
| Wells Fargo & COMPANY/MN | 190.9k | 0.45% | $61.6M | trimmed -34.6% | ≤2013 |
| Driehaus Capital Management LLC | 177.0k | 0.42% | $57.1M | opened | 2026 Q1 |
| Summit Partners Public Asset Management, LLC | 166.4k | 0.39% | $53.7M | trimmed -48.1% | 2024 Q4 |
| Nomura Asset Management International INC. | 164.8k | 0.39% | $53.2M | trimmed -7.5% | 2025 Q2 |
| Aristotle Capital Boston, LLC | 151.4k | 0.36% | $48.8M | trimmed -19.4% | 2014 Q4 |
| First Trust Advisors LP | 144.8k | 0.34% | $46.7M | trimmed -13.9% | ≤2013 |
Largest 50 of 553 shown; the full ranked, searchable register is at boothcheck.com/holders/AEIS. 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.