Free · no sign-up · Q2 2026

Which funds own ACM

Aecom in the Q2 2026 filings. At least 3 of the 91 current managers on file reported a position, worth $43m between them. It is among the largest positions of fewer than a fifth of the current managers on file. Buying and selling roughly cancelled this quarter, which is what a name looks like when the argument is still live.

Managers holding: 3; at least, of 91 current
Combined value: $43m; as reported
Opened: 1; new this quarter
Added to: 2; already held
Trimmed or sold out: 2; 2 sold out entirely

Only each manager’s largest 200 positions are listed here, so a smaller holder may be missing.

Managers reporting a position

Largest first. Weight is the share of that manager’s whole reported book, which is the number worth quoting: $400m is a rounding error in one book and a defining bet in another.

Manager	Value	Weight	Shares	Change on the quarter	Action
Verition Fund Management LLC Multi-strategy · $19.7bn book	$24m	0.1%	349,533	-$4.4m+9,933	Added
PDT Partners LLC Quantitative · $1.9bn book	$12m	0.6%	172,729	opened172,729	New
Caxton Associates LLP Macro · $5.3bn book	$6.6m	0.1%	93,841	-$200k+14,611	Added

Sold out of this quarter

Valued at what the position was worth in the previous filing, because by this one it is gone.

Balyasny Asset Management LLC · Multi-strategy$23m held before
Maverick Capital Ltd · Long/short equity$800k held before

Ownership through time

At least 13 of the 95 managers whose filings are on file listed ACM in Q2 2026, against 4 in Q2 2013. 1 manager more than in Q1 2026: 1 started a position; 3 listed it again; 1 sold out, by its own filing; 2 no longer listed it among the positions read, which can mean a holding below the listed range, a filing that reported no holdings, or a filing not yet made.

Each manager’s largest 500 positions a quarter are read, so a small holding in a very large book can be missing, and a manager is counted as leaving only where its own filing shows it.

Managers on file listing it

Their combined reported value

Between the quarter ends of Q1 2026 and Q2 2026. Each change in shares is valued at the Q2 2026 price, so the price’s own move is left out; a 13F shows the two quarter ends, not when in between anything was bought or sold.

Started in Q2 2026

PDT Partners LLC$12m

Largest increases, by shares

D. E. Shaw & Co.1,062,228 to 1,711,157 shares+$45m
Tudor Investment Corp232,079 to 669,882 shares+$31m
PDT Partners LLCnew: 172,729 shares+$12m
Renaissance Technologies LLC662,277 to 746,877 shares+$5.9m
Freestone Grove Partners LP25,453 to 76,451 shares+$3.6m

Largest decreases, by shares

Voloridge Investment Management LLC564,598 to 306,336 shares-$18m
Bridgewater Associates LP183,161 to 163,405 shares-$1.4m

Left it

Maverick Capital Ltdwas $835k

Manager	First listed	Largest	Q2 2026
Arrowstreet Capital LP	Q2 2026	$146m	$146m
D. E. Shaw & Co.	Q1 2026	$119m	$119m
Two Sigma Investments LP	Q2 2013	$61m	$61m
Renaissance Technologies LLC	Q3 2019	$137m	$52m
Tudor Investment Corp	Q3 2014	$47m	$47m
Squarepoint Ops LLC	Q3 2016	$35m	$35m
Verition Fund Management LLC	Q3 2016	$36m	$24m
Voloridge Investment Management LLC	Q4 2016	$59m	$21m
PDT Partners LLC	Q4 2018	$12m	$12m
Bridgewater Associates LP	Q4 2019	$16m	$11m
Holocene Advisors LP	Q4 2017	$15m	$7.5m
Caxton Associates LLP	Q2 2016	$11m	$6.5m
Freestone Grove Partners LP	Q1 2025	$9.4m	$5.3m
Fidelity (FMR LLC)	Q2 2013	$868m	last listed Q1 2022
Invesco Ltd	Q1 2015	$650m	last listed Q4 2025
Starboard Value LP	Q2 2015	$592m	last listed Q2 2024
AllianceBernstein LP	Q1 2014	$585m	last listed Q4 2025
Wellington Management Group LLP	Q3 2014	$417m	last listed Q2 2015
Millennium Management LLC	Q4 2015	$145m	last listed Q1 2024
Citadel Advisors LLC	Q4 2016	$139m	last listed Q1 2020
Jana Partners	Q3 2014	$109m	last listed Q3 2014
Two Sigma Advisers LP	Q2 2013	$75m	last listed Q3 2025
AQR Capital Management LLC	Q2 2013	$64m	last listed Q4 2024

What ACM is worth

Knowing who owns it is half the question. The other half is what it is worth against the companies it trades beside, which is the one an interviewer will follow up with.

Build the comp set around ACM →

How much of the picture this is

A Form 13F reports US-listed long equity and nothing else: no shorts, no bonds, no cash and no non-US listings. It arrives forty-five days after the quarter ends, so a manager who sold in July still shows the position in a filing published in August. This page reads the managers on file here rather than every filer in the market, and each manager’s largest positions rather than the whole table, so a small position in a very large book may not appear. Say “their last filing showed” rather than “they own”, and the distinction will do you credit.

What to do with a name the funds are buying

Knowing who owns something is the start of a pitch, not the pitch. The next questions are what it is worth and why they were buying.

Comps ExplorerValue it against the peers it trades beside Every managerRead any of these books in full Deal tapeWhat buyers paid for whole companies, not slices Hedge fund interviewsHow the room runs, and the stock pitch it wants

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