Ameresco, Inc. (AMRC) Institutional Ownership

Ownership Summary

According to SEC filings for the period ending September 2025, Ameresco, Inc. (NYSE:AMRC) is held by 184 institutional firms.

• The percentage of Ameresco owned by institutions changed from 62.0% in June 2025 to 63.5% in September 2025, marking a slight up trend.
• Quarterly data indicates a 0.63% shift in institutional share volume, and the annual owner count reflects an increase of 0.55%.
• Of these 184 institutional investors, 78 increased their holdings in Ameresco, while 74 of them reduced positions, and 32 investors maintained their exposure.
• The total number of shares held by institutions in Ameresco increased to 33.48Mn as of September 2025, a net change of up by 208.96K shares quarter on quarter, and up 742.37K shares year over year.
• The top institutional stake in Ameresco as of September 30, 2025 belongs to WELLINGTON MANAGEMENT GROUP LLP, which owns 4.74Mn shares, or 8.99% of the company.
• Among the most significant buyers of Ameresco during September 2025 were WELLINGTON MANAGEMENT GROUP LLP (2.98Mn), ROYCE & ASSOCIATES LP (640.11K), Granahan Investment Management, LLC (462.88K), Handelsbanken Fonder AB (289.38K), D. E. Shaw & Co., Inc. (253.15K).
• Leading sellers of Ameresco stock in September 2025 included FIRST TRUST ADVISORS LP (1.60Mn), Grantham, Mayo, Van Otterloo & Co. LLC (643.54K), Swedbank AB (384.00K), ARDSLEY ADVISORY PARTNERS LP (350.00K), AMERICAN CENTURY COMPANIES INC (271.01K).
• The top 10 institutional holders of Ameresco for the quarter ending September 2025 included WELLINGTON MANAGEMENT GROUP LLP (4.74Mn), Grantham, Mayo, Van Otterloo & Co. LLC (3.20Mn), BlackRock, Inc. (2.42Mn), VANGUARD GROUP INC (2.41Mn), STATE STREET CORP (1.46Mn), DIMENSIONAL FUND ADVISORS LP (1.24Mn), D. E. Shaw & Co., Inc. (1.15Mn), DnB Asset Management AS (1.03Mn), ROYCE & ASSOCIATES LP (964.01K), Granahan Investment Management, LLC (890.07K).