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SC 13G/A

Amended Statement of Ownership

AECOM Filed Acc 0001085146-24-001081

Stakes reported in this filing

Reporting person Shares Of the class
PRIMECAP Management Company 14,009,719 10.3%

Members of a group can each report the same shares, so these rows overlap and don't add up.

Stake history · largest stake in each 13D and 13G

  1. 2026-08-12 SCHEDULE 13D/A · AECOM 18.7%
  2. 2024-09-27 SC 13D/A · AECOM 19.9%
  3. 2024-06-26 SC 13D/A · AECOM 19.9%
  4. 2024-05-24 SC 13D · AECOM 16.7%
  5. 2024-02-13 SC 13G/A · The Vanguard Group 9.68%
  6. 2024-02-12 SC 13G/A · PRIMECAP Management Company 10.3%
  7. 2024-01-23 SC 13G/A · BlackRock, Inc. 12.6%
  8. 2023-02-14 SC 13G/A · AllianceBernstein L.P. 4.1%
  9. 2023-02-09 SC 13G/A · BlackRock, Inc. 10.3%
  10. 2023-02-09 SC 13G/A · The Vanguard Group 9.63%
  11. 2023-02-09 SC 13G/A · PRIMECAP Management Company 12.69%
  12. 2023-02-07 SC 13G/A · BlackRock, Inc. 9.7%
  13. 2023-01-27 SC 13D/A · STARBOARD VALUE LP 4.9%
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