Ameresco
Builds and operates efficiency, renewable-energy and resilient infrastructure for public and commercial customers.
$21.99
After-hours close−0.02 (−0.09%)
At close$22.01(−3.93%)
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Breakdown13F · Form 4
Institutions 67.87%36.01M sharesInsiders 2.92%1.55M sharesOther 29.21%15.50M shares
Shares outstanding 53.06M · Float 48.52M · 91.4% free float
Institutions13F, as of Jun 30, 2026
193 holders · 36.01M shares · 31 new positions · 103 increased · 58 reduced · 29 closed
| Holder | Shares | % outstanding | Chg q/q | Filed |
|---|---|---|---|---|
| Wellington Management Group LLP | 3.37M | 6.36% | −166.8K | Aug 14, 2026 |
| BlackRock, Inc. | 2.65M | 5.00% | +194.8K | Aug 7, 2026 |
| Grantham, Mayo, van Otterloo & Co. LLC | 2.03M | 3.83% | −198.7K | Aug 13, 2026 |
| Dimensional Fund Advisors LP | 1.60M | 3.02% | +161.7K | Aug 11, 2026 |
| State Street Corp | 1.60M | 3.02% | +271.6K | Aug 7, 2026 |
| Millennium Management LLC | 1.49M | 2.80% | +1.23M | Aug 14, 2026 |
| Vanguard Capital Management LLC | 1.43M | 2.70% | +71.9K | Aug 13, 2026 |
| D. E. Shaw & Co., Inc. | 1.26M | 2.37% | −13.7K | Aug 14, 2026 |
Beneficial owners13D/G · 5% or more, as filed
| Holder | % of class | Shares | Form | Filed |
|---|---|---|---|---|
| Sakellaris George P | 39.50% | 20.72M | 13G | Jan 31, 2025 ↗ |
| Wellington Management Group LLP | 10.20% | 3.54M | 13G | May 15, 2026 ↗ |
| Grantham, Mayo, Van Otterloo & Co. LLC | 6.67% | 2.32M | 13G | Feb 10, 2026 ↗ |
| Millennium Management LLC | 5.20% | 1.82M | 13G | Jul 22, 2026 ↗ |
InsidersForm 4
| Insider | Role | Shares | % outstanding | Filed |
|---|---|---|---|---|
| George P. Sakellaris | director, 10 percent owner, officer: Chief Executive Officer | 1.01M | 1.90% | Aug 27, 2026 |
| Joseph W. Sutton | director | 213.6K | 0.40% | Aug 26, 2026 |
| Nicole E. Bulgarino | officer: President - Federal & Utility | 59.3K | 0.11% | Mar 12, 2026 |
| Brian C. Cox | director | 44.3K | 0.08% | Aug 25, 2026 |
| Francis V. Jr Wisneski | director | 35.7K | 0.07% | Jun 5, 2026 |
| Jennifer L. Miller | director | 34.5K | 0.07% | Aug 26, 2026 |
| Louis P. Maltezos | officer: President-Central&West USA Can | 32.1K | 0.06% | Mar 12, 2026 |
| Nickolas Stavropoulos | director | 24.5K | 0.05% | Jun 5, 2026 |
| Charles R. Patton | director | 23.8K | 0.04% | Jun 5, 2026 |
| Claire D'Oyly-Hughes Johnson | director | 22.3K | 0.04% | Jun 5, 2026 |
3 ten-percent owners hold 3.88M shares by Form 4, outside the officers-and-directors figure above · 10 people have not refiled in the last 18 months (6.28M shares), so they are not in the figure above
Latest trades
| Date | Insider | Type | Shares | Avg price | Owned after |
|---|---|---|---|---|---|
| Aug 27, 2026 | George P. Sakellarisdirector, 10 percent owner, officer: Chief Executive Officer | Purchase | 4,000 | $22.84 | 1,010,597 |
| Aug 26, 2026 | George P. Sakellarisdirector, 10 percent owner, officer: Chief Executive Officer | Purchase | 1,000 | $21.92 | 1,006,597 |
| Aug 25, 2026 | George P. Sakellarisdirector, 10 percent owner, officer: Chief Executive Officer | Purchase · 2 lots | 5,000 | $21.95 | 1,005,597 |
| Aug 24, 2026 | George P. Sakellarisdirector, 10 percent owner, officer: Chief Executive Officer | Purchase | 5,000 | $20.91 | 1,000,597 |
| Aug 24, 2026 | Joseph W. Suttondirector | Purchase | 9,700 | $20.87 | 80,246 |
| Aug 24, 2026 | Jennifer L. Millerdirector | Purchase | 2,000 | $20.96 | 34,546 |
| Aug 21, 2026 | Brian C. Coxdirector | Purchase | 4,625 | $21.64 | 44,325 |
| Aug 10, 2026 | Brian C. Coxdirector | Purchase | 39,700 | $25.07 | 39,700 |
| Aug 11, 2026 | George P. Sakellarisdirector, 10 percent owner, officer: Chief Executive Officer | Purchase | 1,000 | $25.90 | 995,597 |
| Aug 10, 2026 | George P. Sakellarisdirector, 10 percent owner, officer: Chief Executive Officer | Purchase | 1,000 | $25.27 | 994,597 |
CongressHouse and Senate disclosures
Not reported.