Aecom
ACM- Exchange
- NYSE
- Industry
- Services-Engineering Services
- SEC CIK
- 0000868857
No open-market purchases or sales by Aecom insiders were filed in the last 90 days; 576 institutions reported holding it in 13F filings for Q2 2026, worth $8.34B in total; no superinvestor holds it.
Holders of 5% or more of ACM
Holders whose latest Schedule 13D or 13G filing reports 5% or more of Aecom, largest stake first. The change is against the holder's previous filing.
| Holder | Latest form | Stake | Change | First filed | Latest filing | Filing |
|---|---|---|---|---|---|---|
| BlackRock, Inc. | 13G/A | 10.10%13.1M shares | +0.30 ppfrom 9.80% | Apr 17, 20252 filings | Feb 6, 2026 | SEC |
| Primecap Management Co | 13G/A | 7.24%9.58M shares | −1.35 ppfrom 8.59% | Feb 13, 20252 filings | Aug 14, 2025 | SEC |
Stakes are as of each holder's latest filing. Holders whose last filing was in the old format (before December 18, 2024) have no stake on record and are not listed, and after an acquisition or delisting holders usually stop filing.
13D and 13G filings
5 Schedule 13D and 13G filings on Aecom, newest first, including old-format filings without a stake.
| Filed (ET) | Filer | Form | Stake | Change | Event date | Filing |
|---|---|---|---|---|---|---|
| Mar 26, 20263:13 PM ET | Vanguard Group Inc | 13G/A | 0.00%0 shares | –Below 5% | Mar 13, 2026 | SEC |
| Feb 6, 202612:08 PM ET | BlackRock, Inc. | 13G/A | 10.10%13.1M shares | +0.30 ppfrom 9.80% | Jan 31, 2026 | SEC |
| Aug 14, 202512:41 PM ET | Primecap Management Co | 13G/A | 7.24%9.58M shares | −1.35 ppfrom 8.59% | Jun 30, 2025 | SEC |
| Apr 17, 20259:35 AM ET | BlackRock, Inc. | 13G/A | 9.80%13.0M shares | – | Mar 31, 2025 | SEC |
| Feb 13, 20257:17 PM ET | Primecap Management Co | 13G/A | 8.59%11.4M shares | – | Dec 31, 2024 | SEC |
Form 144: proposed insider sales
Notices from officers, directors and other affiliates planning to sell Aecom shares.
No Form 144 notices for Aecom are on file.