Aecom (ACM) Institutional Ownership

Ownership Summary

Aecom (NYSE:ACM) currently has 604 active institutional owners and shareholders as of today (December 2025), that have filed 13F forms with the Securities Exchange Commission (SEC).

• These investors collectively held 81.9% of the company's total shares outstanding in December 2025, down from 86.3% in September 2025.
• The company experienced a 1.26% quarterly change in institutional shares held, alongside an increase of 8.24% in total owners annually.
• A review of institutional activity for Aecom shows 275 of 604 filers increasing their positions, while 234 reduced their stake, and 95 remained unchanged.
• The total number of shares held by institutions in Aecom increased to 109.14Mn as of December 2025, a net change of up by 1.36Mn shares quarter on quarter, and down 6.66Mn shares year over year.
• As of December 31, 2025, BlackRock, Inc. held Aecom's largest shareholding position with over 15.21Mn shares, representing 11.41% of total outstanding shares.
• Among the most significant buyers of Aecom during December 2025 were NORGES BANK (2.16Mn), PFA Pension, Forsikringsaktieselskab (697.00K), BlackRock, Inc. (521.69K), MARSHALL WACE, LLP (458.32K), CITADEL ADVISORS LLC (430.05K).
• Leading sellers of Aecom stock in December 2025 included ALLIANCEBERNSTEIN L.P. (1.09Mn), Pictet Asset Management Holding SA (849.55K), CI INVESTMENTS INC. (846.66K), FMR LLC (629.99K), DZ BANK AG Deutsche Zentral Genossenschafts Bank, Frankfurt am Main (391.80K).
• The top 10 institutional holders of Aecom for the quarter ending December 2025 included BlackRock, Inc. (15.21Mn), VANGUARD GROUP INC (12.29Mn), PRIMECAP MANAGEMENT CO/CA/ (8.67Mn), STATE STREET CORP (5.04Mn), FIRST TRUST ADVISORS LP (4.08Mn), Pictet Asset Management Holding SA (2.92Mn), UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC (2.77Mn), GEODE CAPITAL MANAGEMENT, LLC (2.44Mn), NORGES BANK (2.16Mn), NORTHERN TRUST CORP (2.04Mn).