Ameresco Inc
Ownership
Ownership Structure
Who owns Ameresco Inc (AMRC)? This page shows the largest institutions and funds, the ownership structure and the latest insider transactions. 91.4% of the shares are freely tradable; institutional investors hold 99.3%.
Largest Shareholders
Institutions
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Wellington Management Company LLP | 6.36 | 3,374,767 | -4.7 | 06/30/2026 |
| BlackRock Inc | 5.00 | 2,651,574 | +7.9 | 06/30/2026 |
| Grantham, Mayo, Van Otterloo & Co., LLC | 3.83 | 2,030,950 | -8.9 | 06/30/2026 |
| Dimensional Fund Advisors, Inc. | 3.02 | 1,601,338 | +11.2 | 06/30/2026 |
| State Street Corp | 3.02 | 1,601,127 | +20.4 | 06/30/2026 |
| Arnhold & S. Bleichroeder Advisers, LLC | 2.82 | 1,498,162 | +169.8 | 06/30/2026 |
| Millennium Management LLC | 2.80 | 1,487,282 | +489.4 | 06/30/2026 |
| Vanguard Capital Management, LLC | 2.70 | 1,430,762 | +5.3 | 06/30/2026 |
| D. E. Shaw & Co LP | 2.37 | 1,258,266 | -1.1 | 06/30/2026 |
Funds
| Name | Stake (%) | Shares | Change (%) | Date |
|---|---|---|---|---|
| Handelsbanken Hållbar Energi (A1 SEK) | 2.03 | 1,078,212 | -2.4 | 09/30/2026 |
Largest reported positions according to regulatory filings; stake as a percentage of shares outstanding, change versus the previous filing. Source: fundamentals data.
Insider holdings
| Person | Role | Shares | Value | As of | Type |
|---|---|---|---|---|---|
| Sakellaris George P | Chief Executive Officer | 1,019,847 | 21,416,787 $ | Sep 10, 2026 | direct |
| Sutton Joseph W. | Director | 80,246 | 1,685,166 $ | Aug 24, 2026 | direct |
| Bulgarino Nicole E | Co-President | 61,171 | 1,284,591 $ | Sep 10, 2026 | direct |
| Cox Brian C | Director | 44,325 | 930,825 $ | Aug 21, 2026 | direct |
| Miller Jennifer L | Director | 34,546 | 725,466 $ | Aug 24, 2026 | direct |
| Maltezos Louis P | Co-President | 33,628 | 706,188 $ | Sep 15, 2026 | direct |
| Christakis Peter | Chief Operating Officer | 15,106 | 317,226 $ | Sep 10, 2026 | direct |
| Chiplock Mark | EVP, CFO & CAO | 2,815 | 59,115 $ | Sep 15, 2026 | direct |
Holdings as of each person's most recent SEC Form 4 filing — excluding options and RSUs, which are not shares yet. Holdings may have changed between two filings.
Insiders
Insider Transactions
| Date | Person | Role | Type | Shares | Price | Value |
|---|---|---|---|---|---|---|
| Sep 15, 2026 | Chiplock Mark | EVP, CFO & CAO | Sell | 476 | 22.46 | 10,691 |
| Sep 15, 2026 | Maltezos Louis P | Co-President | Sell | 592 | 22.46 | 13,296 |
| Sep 10, 2026 | Chiplock Mark | EVP, CFO & CAO | Other | 1,625 | 0.00 | – |
| Sep 10, 2026 | Sakellaris George P | Chief Executive Officer | Other | 6,250 | 0.00 | – |
| Sep 10, 2026 | Maltezos Louis P | Co-President | Other | 2,125 | 0.00 | – |
| Sep 10, 2026 | Christakis Peter | Chief Operating Officer | Other | 1,750 | 0.00 | – |
| Sep 10, 2026 | Bulgarino Nicole E | Co-President | Other | 1,875 | 0.00 | – |
| Aug 28, 2026 | Sakellaris George P | Chief Executive Officer | Buy | 3,000 | 22.13 | 66,390 |
| Aug 27, 2026 | Sakellaris George P | Chief Executive Officer | Buy | 4,000 | 22.84 | 91,360 |
| Aug 26, 2026 | Sakellaris George P | Chief Executive Officer | Buy | 1,000 | 21.92 | 21,920 |
| Aug 25, 2026 | Sakellaris George P | Chief Executive Officer | Buy | 4,062 | 22.03 | 89,486 |
| Aug 25, 2026 | Sakellaris George P | Chief Executive Officer | Buy | 938 | 21.60 | 20,261 |
| Aug 24, 2026 | Miller Jennifer L | Director | Buy | 2,000 | 20.96 | 41,920 |
| Aug 24, 2026 | Sutton Joseph W. | Director | Buy | 9,700 | 20.87 | 202,439 |
| Aug 24, 2026 | Sakellaris George P | Chief Executive Officer | Buy | 5,000 | 20.91 | 104,550 |
| Aug 21, 2026 | Cox Brian C | Director | Buy | 4,625 | 21.64 | 100,085 |
| Aug 11, 2026 | Sakellaris George P | Chief Executive Officer | Buy | 1,000 | 25.90 | 25,900 |
| Aug 10, 2026 | Sakellaris George P | Chief Executive Officer | Buy | 1,000 | 25.27 | 25,270 |
| Aug 10, 2026 | Cox Brian C | Director | Buy | 39,700 | 25.07 | 995,279 |
| Aug 7, 2026 | Sakellaris George P | Chief Executive Officer | Buy | 5,000 | 25.95 | 129,750 |
Reportable transactions by officers and major shareholders from SEC Form 4 filings. "Other" includes things like stock grants and option exercises without a buy/sell character. View all insider transactions →
Data as of: November 2, 2026 · Source: fundamental data & SEC filings (annual and quarterly reports, 10-K/10-Q)
Note: pure fact-based analysis, not investment advice and not a solicitation to buy or sell. All figures without guarantee.