Ameresco, Inc. (AMRC) Ownership
AMRC ownership summary
as of October 18, 2026- Institutions
- 102.3% of shares outstanding
- Insiders
- 8.98% of shares outstanding
- Shares outstanding
- 35.1M
- Float
- 32.0M shares available to trade
- Short interest
- 19.41% 5.3M shares short
- Days to cover
- 8.30 short interest up 5.5% vs prior month
- Institutions 102.30%
- Insiders 8.98%
AMRC top institutional holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Wellington Management Company LLP | 6.36% | 3.4M | $65.8M | −166,810 (−4.7%) | June 30, 2026 |
| 2 | BlackRock Inc | 5.00% | 2.7M | $51.7M | +194,783 (+7.9%) | June 30, 2026 |
| 3 | Grantham, Mayo, Van Otterloo & Co., LLC | 3.83% | 2.0M | $39.6M | −198,684 (−8.9%) | June 30, 2026 |
| 4 | Dimensional Fund Advisors, Inc. | 3.02% | 1.6M | $31.2M | +161,669 (+11.2%) | June 30, 2026 |
| 5 | State Street Corp | 3.02% | 1.6M | $31.2M | +271,614 (+20.4%) | June 30, 2026 |
| 6 | Arnhold & S. Bleichroeder Advisers, LLC | 2.82% | 1.5M | $29.2M | +942,828 (+169.8%) | June 30, 2026 |
| 7 | Millennium Management LLC | 2.80% | 1.5M | $29.0M | +1.2M (+489.4%) | June 30, 2026 |
| 8 | Vanguard Capital Management, LLC | 2.70% | 1.4M | $27.9M | +71,863 (+5.3%) | June 30, 2026 |
| 9 | D. E. Shaw & Co LP | 2.37% | 1.3M | $24.5M | −13,703 (−1.1%) | June 30, 2026 |
| 10 | DnB NOR Asset Management (Asia) | 1.93% | 1.0M | $20.0M | +123,212 (+13.7%) | June 30, 2026 |
| 11 | Royce & Associates, LP | 1.88% | 998K | $19.5M | −251,725 (−20.1%) | June 30, 2026 |
| 12 | Vanguard Portfolio Management, LLC | 1.72% | 914K | $17.8M | +68,293 (+8.1%) | June 30, 2026 |
| 13 | Geode Capital Management, LLC | 1.63% | 863K | $16.8M | +69,995 (+8.8%) | June 30, 2026 |
| 14 | Handelsbanken Fonder AB | 1.62% | 858K | $16.7M | +42,826 (+5.3%) | June 30, 2026 |
| 15 | Gagnon Securities LLC | 1.56% | 827K | $16.1M | −13,501 (−1.6%) | June 30, 2026 |
| 16 | Schroder Investment Management Group | 1.54% | 819K | $16.0M | +267,683 (+48.6%) | June 30, 2026 |
| 17 | American Century Companies Inc | 1.50% | 798K | $15.6M | +271,967 (+51.7%) | June 30, 2026 |
| 18 | Legal & General Group PLC | 1.50% | 796K | $15.5M | +247,058 (+45.0%) | June 30, 2026 |
| 19 | UBS Group AG | 1.37% | 726K | $14.2M | +307,898 (+73.6%) | June 30, 2026 |
| 20 | Swedbank AB | 1.35% | 718K | $14.0M | +73,000 (+11.3%) | June 30, 2026 |
Value at the latest close. Change = shares bought or sold in the latest quarterly filing (13F). In the top 20, 15 holders added 4.3M shares and 5 cut 644K.
AMRC top mutual fund and ETF holders
20 largest| # | Holder | % of shares | Shares | Value | Change | Reported |
|---|---|---|---|---|---|---|
| 1 | Handelsbanken Hållbar Energi (A1 SEK) | 2.03% | 1.1M | $21.0M | −27,017 (−2.4%) | September 30, 2026 |
| 2 | Vanguard MStar Total Stk Mkt Idx Invest | 1.96% | 1.0M | $20.3M | — | August 31, 2026 |
| 3 | Avantis US Small Cap Value ETF | 1.89% | 1.0M | $19.5M | +2,016 (+0.2%) | September 30, 2026 |
| 4 | iShares Russell 2000 ETF | 1.60% | 849K | $16.6M | −9,792 (−1.1%) | September 30, 2026 |
| 5 | Swedbank Robur USA A | 1.54% | 816K | $15.9M | — | September 30, 2026 |
| 6 | DNB Miljøinvest A | 1.43% | 759K | $14.8M | +37,693 (+5.2%) | August 31, 2026 |
| 7 | First Eagle Small Cap Opportunity I | 1.35% | 714K | $13.9M | +36,057 (+5.3%) | September 30, 2026 |
| 8 | Schroder ISF Glbl Alt Engy E Acc USD | 1.13% | 601K | $11.7M | −16,993 (−2.7%) | August 31, 2026 |
| 9 | GMO Resources III | 1.05% | 556K | $10.8M | — | June 30, 2026 |
| 10 | Stt Strt®SPDR®S&PKenshoNwEcosComposETF | 1.04% | 550K | $10.7M | — | September 30, 2026 |
| 11 | GMO Climate Change III | 0.99% | 527K | $10.3M | — | June 30, 2026 |
| 12 | L&G Clean Energy ETF USD Acc | 0.94% | 499K | $9.7M | −10,251 (−2.0%) | September 30, 2026 |
| 13 | DFA US Small Cap Value I | 0.74% | 392K | $7.6M | +59,064 (+17.8%) | August 31, 2026 |
| 14 | DNB Fund Renewable Energy A EUR Acc | 0.70% | 369K | $7.2M | +18,343 (+5.2%) | August 31, 2026 |
| 15 | GMO Climate Change Trsn Invm A GBP Acc | 0.69% | 364K | $7.1M | −9,500 (−2.5%) | June 30, 2026 |
| 16 | Fidelity Small Cap Index | 0.68% | 359K | $7.0M | +2,970 (+0.8%) | July 31, 2026 |
| 17 | Vanguard Small Cap Index | 0.67% | 355K | $6.9M | −26,469 (−6.9%) | September 30, 2026 |
| 18 | Hartford Small Company Y | 0.64% | 341K | $6.7M | — | August 31, 2026 |
| 19 | iShares Russell 2000 Value ETF | 0.58% | 310K | $6.1M | +470 (+0.2%) | September 30, 2026 |
| 20 | Royce Small-Cap Opportunity Invmt | 0.58% | 305K | $6.0M | +27,751 (+10.0%) | September 30, 2026 |
Funds report holdings monthly or quarterly; dates differ by fund.
AMRC insider transactions
latest 10| Date | Name | Transaction | Price | Shares | Value |
|---|---|---|---|---|---|
| 2026-03-12 | David J Corrsin | Sell | $25.31 | 19 | $481 |
| 2026-03-12 | Louis P Maltezos | Sell | $25.31 | 306 | $7,745 |
| 2026-03-10 | David J Corrsin | Sell | $26.34 | 50 | $1,317 |
| 2026-02-20 | Nickolas Stavropoulos | Sell | $34.15 | 15,700 | $536,155 |
| 2026-02-19 | Nickolas Stavropoulos | Sell | $34.00 | 400 | $13,600 |
| 2026-02-13 | Nickolas Stavropoulos | Sell | $34.05 | 245 | $8,342 |
| 2026-02-12 | Nickolas Stavropoulos | Sell | $34.00 | 200 | $6,800 |
| 2026-01-28 | Nickolas Stavropoulos | Sell | $34.00 | 100 | $3,400 |
| 2025-09-15 | David J Corrsin | Sell | $28.00 | 19 | $532 |
| 2025-09-10 | David J Corrsin | Sell | $27.04 | 19 | $514 |
Reported trades by company officers, directors and other filers (including disclosures by members of Congress where EODHD lists them). "—" where the filing gives no share count.
AMRC shares outstanding
Year-end shares outstanding, adjusted for splits.
Who owns AMRC
Institutional investors own 102.3% of Ameresco's shares and insiders 8.98%. The largest holder is Wellington Management Company LLP with 6.36% of the shares (3.4M), as of June 30, 2026. Among the top 20 institutions, 15 added shares and 5 reduced their stake in the latest filings. Short interest is 19.41% of the float, or 8.30 days of average trading volume. The share count rose 14.8% since 2014.
Related: AMRC analyst forecast, AMRC key metrics. See the AMRC stock overview for the latest quote and news.
AMRC ownership FAQ
Who owns the most Ameresco stock?
The largest shareholders of Ameresco are Wellington Management Company LLP (6.36%), BlackRock Inc (5.00%), Grantham, Mayo, Van Otterloo & Co., LLC (3.83%), Dimensional Fund Advisors, Inc. (3.02%), State Street Corp (3.02%).
What percentage of Ameresco is owned by institutions?
Institutions hold 102.3% of Ameresco's shares outstanding; insiders hold 8.98%.
Which funds own Ameresco?
The largest fund holders of Ameresco are Handelsbanken Hållbar Energi (A1 SEK) (2.03%), Vanguard MStar Total Stk Mkt Idx Invest (1.96%), Avantis US Small Cap Value ETF (1.89%), iShares Russell 2000 ETF (1.60%), Swedbank Robur USA A (1.54%).
What is Ameresco's short interest?
5.3M shares of Ameresco were sold short, 19.41% of the float; at the average daily volume it would take 8.30 days to cover.
Are insiders buying or selling Ameresco?
Of the latest 10 reported insider transactions in Ameresco (since September 10, 2025), 0 were purchases and 10 were sales.
How many shares of Ameresco are outstanding?
Ameresco has 35.1M shares outstanding, of which 32.0M are in the public float.