Aecom Ownership | Who Owns Aecom?

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Aecom Ownership Summary

Aecom is owned by 67.31% institutional investors, 0.48% insiders, and 32.21% retail investors. Blackrock is the largest institutional shareholder, holding 12.74% of ACM shares. iShares Core S&P Mid-Cap ETF is the top mutual fund, with 3.31% of its assets in Aecom shares.

ACM Ownership Benchmark

Type	Name	% Inst	% Insiders	% Retail
Stock	Aecom	67.31%	0.48%	32.21%
Sector	Industrials Stocks	47.66%	12.56%	39.78%

Institutional Shareholders

Top Institutional Shareholders by Total Shares

Holder	Shares	% Holding	Value
Blackrock	17.32M	12.74%	$1.53B
Blackrock funding, inc. /de	15.21M	11.62%	$1.45B
Vanguard group	12.29M	9.29%	$1.17B
Primecap management co/ca/	8.67M	6.62%	$826.25M
State street	5.11M	3.86%	$666.39M
Invesco	4.98M	3.76%	$649.74M
First trust advisors lp	4.22M	3.19%	$550.11M
Pictet asset management sa	2.92M	2.21%	$278.60M
Ubs asset management americas	2.77M	2.12%	$264.44M
Alliancebernstein	2.61M	1.97%	$340.18M

Top Institutional Shareholders by % of Total Assets

Holder	Shares	% Assets	Value
Sandhill capital partners	472.17K	3.21%	$45.01M
Steinberg asset management	29.10K	2.73%	$3.80M
S&t bank/pa	68.54K	2.51%	$8.94M
Stanley capital management	116.40K	1.86%	$11.10M
Lombard odier asset management (europe)	235.28K	1.55%	$30.70M
Nia impact advisors	46.23K	1.48%	$4.41M
Payden & rygel investment group	198.27K	1.41%	$17.48M
Findlay park partners llp	1.01M	1.38%	$131.52M
Benson investment management company	40.43K	1.35%	$3.85M
Rithm capital	5.00K	1.32%	$652.35K

Top Buyers

Holder	Shares	% Assets	Change
First trust advisors lp	4.22M	0.41%	2.16M
Norges bank	2.16M	0.02%	2.16M
Invesco	4.98M	0.10%	618.21K
Blackrock funding, inc. /de	15.21M	0.02%	521.69K
Dz bank ag deutsche zentral genossenschafts bank, frankfurt am main	487.21K	0.06%	435.91K

Top Sellers

Holder	Shares	% Assets	Change
Agf management	-	-	-964.76K
Pictet asset management sa	2.92M	0.27%	-849.55K
Ci investments	310.76K	0.13%	-846.66K
Amundi	1.04M	0.04%	-806.91K
Starboard value lp	-	-	-625.44K

New Positions

Holder	Shares	% Assets	Change	Value
Norges bank	2.16M	0.02%	2.16M	$205.50M
Axa investment managers	281.31K	0.10%	281.31K	$36.70M
Fjarde ap-fonden (the fourth swedish national pensionfund)	89.28K	0.09%	89.28K	$7.87M
Cibc world markets	65.79K	0.03%	65.79K	$6.27M
Y-intercept (hong kong)	65.47K	0.14%	65.47K	$6.24M

Sold Out

Holder	Change
New millennium group	-1.00
Activest wealth management	-1.00
Mv capital management	-1.00
Financial management professionals	-3.00
Harbor investment advisory	-3.00

Institutional Ownership Trends

Date	Holdings	Change %	Shares	Change %	Ownership	Change %	Increased Position	Change %	Decreased Position	Change %
Dec 31, 2025	478	-26.12%	89,028,186	-23.14%	67	0.88%	195	-35.86%	188	-15.70%
Sep 30, 2025	620	-3.43%	111,211,088	-5.67%	84	1.06%	290	-12.12%	215	9.14%
Jun 30, 2025	630	9.38%	122,936,763	6.90%	92	1.23%	325	12.46%	196	-1.51%
Mar 31, 2025	573	-1.72%	114,585,373	-0.87%	86	1.14%	285	-8.06%	201	16.18%
Dec 31, 2024	563	5.83%	115,264,785	0.63%	86	1.20%	294	18.55%	171	-8.56%

Top Mutual Funds Shareholders

Holder	Shares	% Holding	Change
iShares Core S&P Mid-Cap ETF	4.28M	3.31%	-39.96K
Vanguard US Total Market Shares ETF	4.26M	3.21%	-61.36K
Vanguard Total Stock Mkt Idx Inv	4.14M	3.20%	8.43K
Vanguard Capital Opportunity Inv	3.45M	2.67%	11.35K
Vanguard Small Cap Index	2.99M	2.31%	-442.00
Pictet-Water I EUR	1.98M	1.53%	-12.32K
Vanguard Small Cap Value Index Inv	1.92M	1.48%	-14.51K
Vanguard PRIMECAP Core Inv	1.66M	1.28%	41.50K
Pictet Water Segregated Accounts	1.70M	1.27%	1.70M
First Trust Rising Dividend Achiev ETF	1.54M	1.19%	2.41K

Recent Insider Transactions

Date	Name	Role	Activity	Value
Dec 15, 2025	Gan David Y.	CHIEF LEGAL OFFICER	Sell	$593.10K
Dec 17, 2025	Gan David Y.	CHIEF LEGAL OFFICER	Sell	$921.79K
Dec 17, 2025	Poloni Lara	PRESIDENT	Sell	$18.98K
Dec 17, 2025	Poloni Lara	PRESIDENT	Sell	$1.68M
Aug 15, 2025	Rudd Troy	CHIEF EXECUTIVE OFFICER	Sell	$5.01M

Insider Transactions Trends

Date	Buy	Sell
2026 Q1	-	-
2025 Q4	-	4
2025 Q3	-	2
2025 Q1	-	-
2024 Q4	-	12

ACM Ownership FAQ

Who owns the most shares of Aecom?

Aecom’s largest shareholders are Blackrock (17.32M shares, 12.74%), Blackrock funding, inc. /de (15.21M shares, 11.62%), and Vanguard group (12.29M shares, 9.29%). Together, they hold 33.64% of Aecom’s total shares outstanding.

Does Blackrock own Aecom?

Yes, BlackRock owns 12.74% of Aecom, totaling 17.32M shares as of Jun 2024. This represents 0.03% of BlackRock's total assets, with a market value of 1.53B$. In the last quarter, BlackRock decreased its holdings by -381K shares, a -2.15% change.

Who is Aecom’s biggest shareholder by percentage of total assets invested?

Sandhill capital partners is Aecom’s biggest shareholder by percentage of total assets invested, with 3.21% of its assets in 472.17K Aecom shares, valued at 45.01M$.

Who is the top mutual fund holder of Aecom shares?

iShares Core S&P Mid-Cap ETF is the top mutual fund holder of Aecom shares, with 3.31% of its total shares outstanding invested in 4.28M Aecom shares.

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