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SC 13D

Beneficial Ownership Report

AECOM Filed Acc 0000921895-20-003136

Stakes reported in this filing

Reporting person Shares Of the class
STARBOARD VALUE LP 7,771,992 5.2%
STARBOARD VALUE GP LLC 7,771,992 5.2%
STARBOARD PRINCIPAL CO LP 7,771,992 5.2%
STARBOARD PRINCIPAL CO GP LLC 7,771,992 5.2%
JEFFREY C. SMITH 7,771,992 5.2%
PETER A. FELD 7,771,992 5.2%
STARBOARD VALUE AND OPPORTUNITY MASTER FUND LTD 3,496,800 2.3%
STARBOARD VALUE AND OPPORTUNITY S LLC 624,748
STARBOARD VALUE AND OPPORTUNITY C LP 360,962
STARBOARD P FUND LP 657,464
STARBOARD VALUE P GP LLC 657,464
STARBOARD VALUE R LP 1,018,426
STARBOARD VALUE AND OPPORTUNITY MASTER FUND L LP 313,391
STARBOARD VALUE L LP 313,391
STARBOARD VALUE R GP LLC 1,331,817
STARBOARD LEADERS YANKEE LLC 364,945
STARBOARD LEADERS FUND LP 364,945
STARBOARD LEADERS SELECT X LP 379,302
STARBOARD LEADERS SELECT X GP LLC 379,302
STARBOARD VALUE A LP 744,247
STARBOARD VALUE A GP LLC 744,247
STARBOARD VALUE X MASTER FUND LTD 479,797

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%
  14. 2022-02-14 SC 13G/A · AllianceBernstein L.P. 5.3%
  15. 2022-02-10 SC 13G/A · PRIMECAP Management Company 14.38%
  16. 2022-02-09 SC 13G/A · The Vanguard Group 9.19%
  17. 2022-02-01 SC 13G/A · BlackRock, Inc. 8.3%
  18. 2021-02-12 SC 13G/A · PRIMECAP Management Company 14.69%
  19. 2021-02-10 SC 13G/A · The Vanguard Group 8.88%
  20. 2021-02-08 SC 13G · AllianceBernstein L.P. 5.1%
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