Ameresco, Inc.
DE ˙ DB ˙ US02361E1082
29,90 € ↑0,40 (1,36%)
2026-06-02
DEL PRIS
SecurityDE:4AM / Ameresco, Inc.
InstitutionCitigroup Inc
Latest Disclosed Ownership29,723 shares
Latest Disclosed Value $ 757,937
Citigroup Inc reports 290.07% increase in ownership of 4AM / Ameresco, Inc.

On May 11, 2026 - Citigroup Inc filed a 13F-HR form disclosing ownership of 29,723 shares of Ameresco, Inc. (DE:4AM) valued at $655,689 USD as of March 31, 2026. The entity filed a previous 13F-HR on February 13, 2026 disclosing 7,620 shares of Ameresco, Inc.. This represents a change in shares of 290.07% during the quarter. The current value of the position is $888,718 USD.

Institutional Ownership: 13F and NPORT Filings

The Security and Class in the table below are shown exactly as filed by the investor. We do our best to track continuity of investments through acquisitions, and this will be reflected in the table as changes in names. In addition to descriptive data, performance of the investment is shown over time. To calculate quarterly performance, we first calculate cost basis of the shares purchased during the quarter, then use that to calculate gross profit. Quarterly return is Gross Profit / Starting Portfolio value.

Note that cost basis is calculated and stored in thousands, so small quarterly changes in shares frequently result in a cost basis of zero.

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Disclosed Equity Positions (from 13F/NPORT Filings)
File
Date		 Effective
Date		Form Security Class ID Avg Price
Paid (Est)		 Reported
Shares		 ΔShares ΔShares
(%)		 Reported
Value
(x1000)		 ΔValue
(%)		 Alloc
(%)		 ΔAlloc ΔAlloc (%) Cost Basis
(x1000)		 Unrealized
Gain/Loss
(x1000)
2026-05-11 2026-03-31 13F AMERESCO CL A 02361E108 29,723 22,103 290.07 758 239.46 0.0002
2026-02-13 2025-12-31 13F AMERESCO CL A 02361E108 7,620 -703 -8.45 223 -20.07 0.0001
2025-11-10 2025-09-30 13F AMERESCO CL A 02361E108 8,323 -63,975 -88.49 279 -74.59 0.0001
2025-08-11 2025-06-30 13F AMERESCO CL A 02361E108 72,298 41,268 132.99 1,098 193.58 0.0005
2025-05-12 2025-03-31 13F AMERESCO CL A 02361E108 31,030 -4,087 -11.64 375 -54.61 0.0002
2025-02-12 2024-12-31 13F AMERESCO CL A 02361E108 35,117 10,196 40.91 825 -12.80 0.0005
2024-11-12 2024-09-30 13F AMERESCO CL A 02361E108 24,921 17,707 245.45 946 356.52 0.0005
2024-08-12 2024-06-30 13F AMERESCO CL A 02361E108 7,214 1,900 35.75 208 61.72 0.0001
2024-05-10 2024-03-31 13F AMERESCO CL A 02361E108 5,314 -5,506 -50.89 128 -62.57 0.0001
2024-02-09 2023-12-31 13F AMERESCO CL A 02361E108 10,820 -25,969 -70.59 343 -75.88 0.0002
2023-12-06 2023-09-30 13F/A-1 AMERESCO CL A 02361E108 36,789 -26,449 -41.82 1,419 -53.89 0.0011
2023-11-09 2023-09-30 13F AMERESCO CL A 02361E108 36,789 -26,449 1,419 0.0004
2023-08-10 2023-06-30 13F AMERESCO CL A 02361E108 63,238 50,047 379.40 3,075 373.81 0.0020
2023-05-11 2023-03-31 13F AMERESCO CL A 02361E108 13,191 8,536 183.37 649 144.91 0.0005
2023-02-09 2022-12-31 13F AMERESCO CL A 02361E108 4,655 -38,110 -89.11 266 -90.68 0.0002
2022-11-10 2022-09-30 13F AMERESCO CL A 02361E108 42,765 35,752 509.80 2,844 791.54 0.0020
2022-08-10 2022-06-30 13F AMERESCO CL A 02361E108 7,013 128 1.86 319 -41.79 0.0002
2022-05-12 2022-03-31 13F AMERESCO CL A 02361E108 6,885 -7,397 -51.79 548 -52.88 0.0003
2022-02-10 2021-12-31 13F AMERESCO CL A 02361E108 14,282 1,587 12.50 1,163 56.74 0.0006
2021-11-10 2021-09-30 13F AMERESCO CL A 02361E108 12,695 1,205 10.49 742 2.91 0.0004
2021-08-10 2021-06-30 13F AMERESCO CL A 02361E108 11,490 -137,538 -92.29 721 -90.05 0.0004
2021-05-13 2021-03-31 13F AMERESCO CL A 02361E108 149,028 -41,259 -21.68 7,247 -27.10 0.0047
2021-02-11 2020-12-31 13F AMERESCO CL A 02361E108 190,287 156,196 458.17 9,941 772.78 0.0059
2020-11-12 2020-09-30 13F AMERESCO CL A 02361E108 34,091 -4,974 -12.73 1,139 4.98 0.0007
2020-08-12 2020-06-30 13F AMERESCO CL A 02361E108 39,065 32,008 453.56 1,085 804.17 0.0008
2020-05-12 2020-03-31 13F AMERESCO CL A 02361E108 7,057 1,271 21.97 120 18.81 0.0001
2020-02-12 2019-12-31 13F AMERESCO CL A 02361E108 5,786 3,101 115.49 101 134.88 0.0001
2019-11-08 2019-09-30 13F AMERESCO CL A 02361E108 2,685 -2,904 -51.96 43 -47.56 0.0000
2019-08-12 2019-06-30 13F AMERESCO CL A 02361E108 5,589 918 19.65 82 7.89 0.0001
2019-05-13 2019-03-31 13F AMERESCO CL A 02361E108 4,671 129 2.84 76 18.75 0.0001
2019-02-12 2018-12-31 13F AMERESCO CL A 02361E108 4,542 -664 -12.75 64 -9.86 0.0001
2018-11-13 2018-09-30 13F AMERESCO CL A 02361E108 5,206 31 0.60 71 14.52 0.0001
2018-08-10 2018-06-30 13F AMERESCO CL A 02361E108 5,175 -6,386 -55.24 62 -58.67 0.0001
2018-05-11 2018-03-31 13F AMERESCO CL A 02361E108 11,561 2,823 32.31 150 100.00 0.0001
2018-02-12 2017-12-31 13F AMERESCO CL A 02361E108 8,738 -4,846 -35.67 75 -29.25 0.0001
2017-11-13 2017-09-30 13F AMERESCO CL A 02361E108 13,584 2,011 17.38 106 17.78 0.0001
2017-08-11 2017-06-30 13F AMERESCO CL A 02361E108 11,573 -1,109 -8.74 90 8.43 0.0001
2017-05-12 2017-03-31 13F AMERESCO CL A 02361E108 12,682 -21,817 -63.24 83 -56.32 0.0001
2017-02-10 2016-12-31 13F AMERESCO CL A 02361E108 34,499 32,782 1,909.26 190 2,011.11 0.0002
2016-11-10 2016-09-30 13F AMERESCO CL A 02361E108 1,717 -398 -18.82 9 0.00 0.0000
2016-08-12 2016-06-30 13F AMERESCO CL A 02361E108 2,115 -29,322 -93.27 9 -94.00 0.0000
2016-05-13 2016-03-31 13F AMERESCO CL A 02361E108 31,437 19,118 155.19 150 94.81 0.0002
2016-02-12 2015-12-31 13F AMERESCO CL A 02361E108 12,319 12,316 410,533.33 77 0.0001
2015-11-13 2015-09-30 13F AMERESCO CL A 02361E108 3 -258 -98.85 0 -100.00
2015-08-13 2015-06-30 13F AMERESCO CL A 02361E108 261 -1,008 -79.43 2 -80.00 0.0000
2015-05-14 2015-03-31 13F AMERESCO CL A 02361E108 1,269 -2,858 -69.25 10 -65.52 0.0000
2015-02-17 2014-12-31 13F AMERESCO CL A 02361E108 4,127 3,435 496.39 29 480.00 0.0000
2014-11-14 2014-09-30 13F AMERESCO CL A 02361E108 692 524 311.90 5 400.00 0.0000
2014-08-14 2014-06-30 13F AMERESCO CL A 02361E108 168 -3,137 -94.92 1 -96.00 0.0000
2014-05-15 2014-03-31 13F AMERESCO CL A 02361E108 3,305 -4,743 -58.93 25 -67.95 0.0000
2014-02-14 2013-12-31 13F AMERESCO CL A 02361E108 8,048 3,957 96.72 78 90.24 0.0001
2013-11-14 2013-09-30 13F AMERESCO CL A 02361E108 4,091 -6,313 -60.68 41 -56.38 0.0000
2013-08-14 2013-06-30 13F AMERESCO CL A 02361E108 10,404 10,404 94 0.0001
Legend
Shares
The total number of shares held by the institution at the end of the reporting period (the effective date). This is provided in the filing.
Value
The total value of the shares as of the effective date. This is provided in the filing.
Avg. Share Price
The weighted average share price of the shares held by the institution. We use FIFO accounting to determine this price
Class
This is the security class as indicated by the filer. There are a variety of values for this field. Common values include "EC" = equity common, "EP" - equity preferred
Allocation (%)
The percent of the institution's portfolio that this position represents. This is provided in NPORT filings. For 13F filings, we calculate it.
Change in Allocation
The change in allocation from the prior reporting period. This is calculated as current allocation - prior allocation.
Change in Allocation (%)
The percent change in allocation from the prior reporting period. This is calculated as (current allocation - prior allocation) / prior allocation.
Cost Basis
The total cost of the shares held. This is calculated as reported shares * avg. share price
Unrealized Gain/Loss
This is the market value of the position as of the effective date minus the cost basis.