$ACM

$60.72 +$0.23 (0.38%) Close

$ACM Overview Financial Statements SEC Filings Executives News Red Flags Capital Raising Ownership Insider Transactions Congressional Trades

Ownership

13F as of Q2 2026 · 128.7M shares outstanding

Who owns ACM?

By type of holder

Institutions 92.2% Insiders 0.7% Everyone else 7.1%

Concentration Top 10 holders own 44.3%

BlackRock, Inc. 11.2% · Primecap Management Co/ca/ 6.8%

Institutional ownership

92.2%

+4.5 pts vs last qtr

Institutional holders

573

-49 vs last qtr

Net shares bought

+5.8M

by institutions in Q2 2026

New / sold out

85 / 134

positions opened vs closed

How is ownership changing?

Institutions, last 8 quarters

Biggest buyers in Q2 2026

Barrow Hanley Mewhinney & Strauss LLC +2.6M
Arrowstreet Capital, Limited Partnership +1.9M

Biggest sellers in Q2 2026

Pictet Asset Management Holding SA −2.0M
BlackRock, Inc. −1.4M

Who is planning to sell?

Notices of proposed sale, last 12 months

$3.22M

3 notices from 2 people

Shares covered

33.0K

0.03% of the company

Arranged in advance

100%

of the value is under a 10b5-1 plan

Under a 10b5-1 plan No plan

Largest proposed sellers

Lara Poloni Officer 10b5-1 $1.7M
David Gan Officer 10b5-1 $1.51M

Every notice on Red Flags →

A Form 144 is notice of a planned sale, not the sale itself. What insiders actually sold is on Insider Transactions.

Is your stake being diluted?

Diluted share count, FY2016–FY2025

−14.6%

−1.74% a year

Each share's claim on the business

+17.1%

grew without buying or selling a share

Spent on buybacks vs paid in stock

$3.1B vs $600M

over 10 fiscal years

Diluted shares, split-adjusted

Buybacks Stock-based comp

How patient are the owners?

Institutional shares by how long they've been held

5+ years76% 3–5 years5% 1–3 years8% Under 1 year12%

Quarterly turnover

18.3%

of institutional shares changed hands

Top 10 managers, median time held

5 years

Super Investors

Investment managers reporting ACM on Form 13F

Holder	Shares	% of company	Change vs last qtr	Held since	% of their book
B BlackRock, Inc.	14.4M	11.17%	−1.4M (−8.8%)	≤2021	0.0%
Shares held by quarter Peak holding15.8M (Q3'24) Change over 8 quarters−1.4M Share of the company11.170% BlackRock, Inc.'s full portfolio →
PM Primecap Management Co/ca/	8.8M	6.83%	+140.0K (+1.6%)	≤2021	0.4%
Shares held by quarter Peak holding12.5M (Q3'24) Change over 8 quarters−3.7M Share of the company6.830% Primecap Management Co/ca/'s full portfolio →

BlackRock, Inc.

14.4M

% of company

11.17%

Change vs last qtr

−1.4M (−8.8%)

Held since

≤2021

Primecap Management Co/ca/

8.8M

% of company

6.83%

Change vs last qtr

+140.0K (+1.6%)

Held since

≤2021

28 more super investors behind a free account

See every manager holding AECOM, how their position has changed, and how long they've held it.

Institutional Funds

Mutual funds and ETFs reporting ACM on Form N-PORT; together they hold 39.6% of the company

Fund	Position value	Shares	% of company	% of the fund	As of
IC iShares Core S&P Mid-Cap ETF iShares Trust	$307M	4.4M	3.42%	0.25%	June 30, 2026
VT Vanguard Total Stock Market Index Fund Vanguard Index Funds	$285M	4.1M	3.17%	0.01%	June 30, 2026

iShares Core S&P Mid-Cap ETF

iShares Trust

Position value

$307M

% of company

3.42%

% of the fund

0.25%

As of

June 30, 2026

Vanguard Total Stock Market Index Fund

Vanguard Index Funds

Position value

$285M

% of company

3.17%

% of the fund

0.01%

As of

June 30, 2026

23 more funds behind a free account

See every fund holding AECOM and how much of the fund the position is.

Insiders and 5%+ holders

From Forms 3/4/5 and Schedules 13D/G

Holder	Shares	% of company	Change vs last qtr	8 quarters	Held since	% of their book
RT Rudd Troy Insider	403.4K	0.31%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.310% Rudd Troy's insider activity →
PL Poloni Lara Insider	153.6K	0.12%	—	—	—	—
Insider holdings come from Form 3/4/5 filings, which are not quarterly. Share of the company0.120% Poloni Lara's insider activity →

Rudd Troy

Insider

403.4K

% of company

0.31%

Change vs last qtr

—

Held since

—

Poloni Lara

Insider

153.6K

% of company

0.12%

Change vs last qtr

—

Held since

—

10 more holders behind a free account

See every insider and 5%+ holder of AECOM.

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