BeStock  

Ameresco AMRC

US equityMarket cap rank #3130Engineering & Construction
$21.93 −$0.75 (-3.31%)
Pre-market · Oct 8, 7:50 am ET · After hours $21.93 0.00%
Open$22.15
Prev close$22.68
Day range$21.32 – $22.15
Volume455.3K
Market cap$1.16B
P/E (TTM)41.4
Dividend yield–

Ownership & positioning

Who holds it, who is betting against it, and where the big money is moving

Institutional ownership70.6%-0.04 pts vs. prior quarter
Institutions holding245+0 vs. prior quarter
Insider trades (recent)34 buys / 9 sellsNet buying
Short interest10.22% of floatDays to cover 7.9 · as of 15 Sep 2026
Short-sale volume share26.2%5-day average of daily volume

Short-sale volume as % of daily volume

15%25%34%44%Sep '26Sep '26Oct '26

Large-order net flow, last 20 sessions

Net of large-order buying minus selling, in USD. Over this window: −$5.11M (4 inflow days, 16 outflow days).

Net flow by order size, last 20 sessions

−$3.9MSuper−$1.2MBig+$614.8KMid+$452.6KSmall

Super/Big orders approximate institutional-size trades; Mid/Small approximate retail-size trades. Net buy minus sell value in each bucket, summed over the window.

The five largest holders on file together own 56.9% of shares outstanding.

Largest holders

  • George Sakellaris38.29%
  • Wellington Management Group6.36%
  • BlackRock5.00%
  • Grantham Mayo Van Otterloo & Co. LLC3.83%
  • Millennium Management LLC3.42%
  • Vanguard Capital Management, LLC3.08%
  • Dimensional Fund Advisors3.02%
  • State Street Global Advisors3.02%

By investor type

  • Mutual Fund56.42%
  • Individual/Insider39.62%
  • Hedge Fund10.44%
  • Public Company1.83%
  • Private Company1.24%
  • Government Pension Fund0.26%
  • Insurance Company0.15%
  • Sovereign Wealth Fund0.14%

Reported short interest has risen from 7.88% to 10.22% of float over the last 6 biweekly reports (30 Jun 2026 to 15 Sep 2026).

Recent institutional activity

HolderTypePeriodShare changeNew stake
Gagnon Securities, LLC Mutual Fund 2026/Q3 +173,232 1.9%
Nuveen Asset Management LLC Insurance Company 2026/Q3 +79,575 0.2%
Millennium Management LLC Hedge Fund 2026/Q3 +328,887 3.4%
Mackenzie Financial Corporation Mutual Fund 2026/Q3 +371,053 0.7%
JCP Investment Management, LLC Hedge Fund 2026/Q3 +339,000 0.6%
UBS Asset Management Mutual Fund 2026/Q3 +316,321 1.4%
American Century Investment Management Mutual Fund 2026/Q3 +271,967 1.5%
State Street Global Advisors Mutual Fund 2026/Q3 +271,614 3.0%
Schroder Investment Management Limited Mutual Fund 2026/Q3 +267,683 1.5%
Legal & General Investment Management Mutual Fund 2026/Q3 +247,058 1.5%
BlackRock Mutual Fund 2026/Q3 +194,783 5.0%
First Eagle Investment Management, LLC Mutual Fund 2026/Q3 +193,747 1.4%
Dimensional Fund Advisors Mutual Fund 2026/Q3 +161,669 3.0%
Susquehanna International Group, LLP Private Company 2026/Q3 +158,614 0.4%
First Trust Advisors L.P. Mutual Fund 2026/Q3 +126,090 0.6%

Institutional buy/sell activity by reporting period, largest moves first.

Insider transactions

DateInsiderTitleTransactionSharesPriceHeld after
24 Sep 2026 Julie Bradshaw Interim Principal Financial Officer Initial Statement of Beneficial +0 – 4,000
24 Sep 2026 Debbie Angelico Interim Principal Accounting Officer Initial Statement of Beneficial +0 – 21,000
14 Sep 2026 Louis Maltezos Executive Vice President of Central Region & Canada Operations Open Market Disposition -592 $22.46 33,628
14 Sep 2026 Mark Chiplock Senior VP of Finance & Chief Accounting Officer Open Market Disposition -476 $22.46 2,815
9 Sep 2026 George Sakellaris Chairperson & CEO Derivative Exercise and Retained +6,250 – 2,319,847
9 Sep 2026 Louis Maltezos Executive Vice President of Central Region & Canada Operations Derivative Exercise and Retained +2,125 – 34,220
9 Sep 2026 Nicole Bulgarino Executive VP & GM of Federal Solutions Derivative Exercise and Retained +1,875 – 61,171
9 Sep 2026 Mark Chiplock Senior VP of Finance & Chief Accounting Officer Derivative Exercise and Retained +1,625 – 3,291
9 Sep 2026 Peter Christakis Executive VP & GM of Northeast Region Derivative Exercise and Retained +1,750 – 15,106
27 Aug 2026 George Sakellaris Chairperson & CEO Open Market Acquisition +3,000 $22.13 2,313,597
26 Aug 2026 George Sakellaris Chairperson & CEO Open Market Acquisition +5,000 $22.84 2,310,597
24 Aug 2026 George Sakellaris Chairperson & CEO Open Market Acquisition +10,000 $22.03 2,305,597
23 Aug 2026 Joseph Sutton Lead Independent Director Open Market Acquisition +9,700 $20.87 80,246
23 Aug 2026 Jennifer Miller Independent Director Open Market Acquisition +2,000 $20.96 34,546
20 Aug 2026 Brian Cox Director Open Market Acquisition +4,625 $21.64 44,325
16 Aug 2026 David Corrsin Executive VP, General Counsel, Corporate Secretary & Director Other Derivative Acquisition +25,000 $14.55 25,000
10 Aug 2026 George Sakellaris Chairperson & CEO Open Market Acquisition +7,000 $25.95 2,295,597
9 Aug 2026 Brian Cox Director Open Market Acquisition +39,700 $25.07 39,700
31 Jul 2026 Brian Cox Director Other Derivative Acquisition +5,132 – 5,132
3 Jun 2026 Joseph Sutton Lead Independent Director Other Derivative Acquisition +4,812 – 4,812

From Form 4/Form 144 filings. Negative share counts are disposals (sales, gifts, or shares withheld for taxes); positive are acquisitions.

Short interest, by report

Report dateShares short% of floatDays to cover
15 Sep 2026 5,421,459 10.2% 7.9
31 Aug 2026 4,986,733 9.4% 5.9
14 Aug 2026 4,506,688 8.5% 5.4
31 Jul 2026 4,479,520 8.5% 8.2
15 Jul 2026 4,215,391 8.0% 9.2
30 Jun 2026 4,170,272 7.9% 6.7

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