Mar 31, 2026 filings. Quarterly 13F reports arrive up to 45 days after quarter end; this register is filed through May 29, 2026.
179 institutional managers reported holding AMRC for the quarter ended Mar 31, 2026. Together they hold about 59% of shares outstanding; the top 10 hold 30%. 30 opened new positions; 39 closed out. Complete ranked register from SEC 13F filings.
| manager | shares | % out | value (Mar 31, 2026 close) | change | held since |
|---|---|---|---|---|---|
| Wellington Management | 3.54M | 6.70% | $90.3M | trimmed -9.2% | 2022 Q3 |
| BlackRock | 2.46M | 4.64% | $62.6M | unchanged | ≤2013 |
| Grantham, Mayo, Van Otterloo & CO. LLC | 2.23M | 4.22% | $56.8M | trimmed -4.1% | 2021 Q1 |
| Dimensional Fund Advisors | 1.44M | 2.72% | $36.7M | added +13.1% | ≤2013 |
| State Street | 1.33M | 2.51% | $33.9M | unchanged | 2015 Q4 |
| D. E. Shaw | 1.27M | 2.40% | $32.4M | unchanged | 2023 Q4 |
| Royce & Associates | 1.25M | 2.36% | $31.9M | added +17.2% | 2025 Q1 |
| DNB Asset Management AS | 902.3k | 1.71% | $23.0M | added +14.9% | 2024 Q1 |
| Gagnon Securities LLC | 840.1k | 1.59% | $21.4M | added +0.9% | ≤2013 |
| Handelsbanken Fonder AB | 815.2k | 1.54% | $20.8M | added +25.2% | 2018 Q4 |
| Geode Capital | 792.9k | 1.50% | $20.2M | added +4% | ≤2013 |
| Morgan Stanley | 670.6k | 1.27% | $17.1M | added +14.9% | ≤2013 |
| Swedbank Robur | 645.0k | 1.22% | $16.4M | added +74.3% | 2025 Q3 |
| Granahan Investment Management, LLC | 630.1k | 1.19% | $16.1M | trimmed -25.7% | 2021 Q1 |
| First Eagle Investment Management | 555.3k | 1.05% | $14.2M | trimmed -3.4% | 2024 Q3 |
| Schroder Investment Management Group | 551.2k | 1.04% | $14.1M | opened | 2025 Q3 |
| Legal & General Group PLC | 549.2k | 1.04% | $14.0M | added +17.5% | 2016 Q4 |
| American Century Companies INC | 526.2k | 0.99% | $13.4M | added +33.1% | 2022 Q3 |
| Royal Bank OF Canada | 504.1k | 0.95% | $12.9M | trimmed -15.9% | ≤2013 |
| Bandera Partners LLC (focused) | 476.3k | 0.90% | $12.1M | trimmed -9.6% | 2018 Q1 |
| Gagnon Advisors, LLC (focused) | 472.8k | 0.89% | $12.1M | unchanged | 2013 Q4 |
| Redwood Grove Capital, LLC (focused) | 469.5k | 0.89% | $12.0M | trimmed -4.7% | 2024 Q1 |
| UBS | 452.2k | 0.85% | $11.5M | added +2.7% | ≤2013 |
| Bridgeway Capital Management, LLC | 372.1k | 0.70% | $9.5M | added +5% | 2025 Q1 |
| Invesco | 337.1k | 0.64% | $8.6M | trimmed -28.7% | ≤2013 |
| Silvercrest Asset Management Group LLC | 310.8k | 0.59% | $7.9M | trimmed -9.9% | 2024 Q3 |
| Exchange Traded Concepts, LLC | 310.4k | 0.59% | $7.9M | opened | 2026 Q1 |
| Northern Trust | 272.2k | 0.52% | $6.9M | added +4.2% | ≤2013 |
| Goldman Sachs | 259.4k | 0.49% | $6.6M | added +102.7% | 2018 Q2 |
| Charles Schwab Investment Management | 252.6k | 0.48% | $6.4M | trimmed -3.4% | ≤2013 |
| Millennium Management | 252.3k | 0.48% | $6.4M | added +85.4% | 2021 Q1 |
| Balyasny Asset Management | 227.5k | 0.43% | $5.8M | opened | 2025 Q1 |
| Empowered Funds, LLC | 225.6k | 0.43% | $5.8M | added +8.5% | 2025 Q1 |
| Tudor Investment | 215.2k | 0.41% | $5.5M | trimmed -3.1% | 2023 Q4 |
| Citadel Advisors | 213.3k | 0.40% | $5.4M | added +419.5% | 2025 Q4 |
| Russell Investments Group, LTD. | 211.3k | 0.40% | $5.4M | trimmed -4.9% | 2020 Q1 |
| Rock Point Advisors, LLC | 211.1k | 0.40% | $5.4M | added +10.1% | 2022 Q2 |
| Guinness Asset Management LTD | 186.9k | 0.35% | $4.8M | added +0.9% | 2019 Q1 |
| DekaBank Deutsche Girozentrale | 184.9k | 0.35% | $4.7M | unchanged | 2020 Q1 |
| First Trust Advisors LP | 174.0k | 0.33% | $4.4M | trimmed -83.7% | 2018 Q1 |
| BNP Paribas Financial Markets | 152.7k | 0.29% | $3.9M | added +18.5% | 2014 Q2 |
| Baird Financial Group, INC. | 150.5k | 0.28% | $3.8M | opened | 2026 Q1 |
| Erste Asset Management GmbH | 146.4k | 0.28% | $3.7M | added +10.7% | 2019 Q3 |
| Hussman Strategic Advisors, INC. | 126.0k | 0.24% | $3.2M | opened | 2026 Q1 |
| Connors Investor Services INC | 125.6k | 0.24% | $3.2M | unchanged | 2020 Q1 |
| Bank OF America CORP /DE/ | 125.4k | 0.24% | $3.2M | added +64.7% | ≤2013 |
| Panagora Asset Management INC | 125.1k | 0.24% | $3.2M | added +246.1% | 2025 Q4 |
| Segall Bryant & Hamill, LLC | 123.6k | 0.23% | $3.2M | opened | 2026 Q1 |
| BNY Mellon | 116.4k | 0.22% | $3.0M | trimmed -2.4% | ≤2013 |
| Qube Research & Technologies LTD | 107.7k | 0.20% | $2.7M | opened | 2026 Q1 |
Largest 50 of 179 shown; the full ranked, searchable register is at boothcheck.com/holders/AMRC. 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.