Free · no sign-up · Q2 2026

Which funds own MWA

Mueller WTR Prods Inc in the Q2 2026 filings. At least 3 of the 91 current managers on file reported a position, worth $78m 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: $78m; as reported
Opened: 1; new this quarter
Added to: 1; already held
Trimmed or sold out: 3; 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
GAMCO Investors Inc Activist · $11.1bn book	$66m	0.6%	2,538,072	-$4.5m-11,395	Trimmed
PDT Partners LLC Quantitative · $1.9bn book	$8.2m	0.4%	315,786	+$300k+31,362	Added
Quantbot Technologies LP Quantitative · $2.5bn book	$4.2m	0.2%	164,352	opened164,352	New

Sold out of this quarter

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

Jane Street Group LLC · Quantitative$9.7m held before
Neuberger Berman Group LLC · Long-only$200k held before

Ownership through time

At least 6 of the 95 managers whose filings are on file listed MWA in Q2 2026, against 6 in Q2 2013. 1 manager more than in Q1 2026: 1 started a position; 1 listed it again; 1 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

ExodusPoint Capital Management LP$9.9m
Quantbot Technologies LP$4.2m

Largest increases, by shares

ExodusPoint Capital Management LPnew: 384,201 shares+$9.9m
Janus Henderson Group Ltd1,934,813 to 2,205,138 shares+$7.0m
Quantbot Technologies LPnew: 164,352 shares+$4.2m
PDT Partners LLC284,424 to 315,786 shares+$810k

Largest decreases, by shares

GAMCO Investors Inc2,549,467 to 2,538,072 shares-$294k

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
GAMCO Investors Inc	Q2 2013	$87m	$66m
Janus Henderson Group Ltd	Q2 2013	$57m	$57m
ExodusPoint Capital Management LP	Q3 2020	$9.9m	$9.9m
PDT Partners LLC	Q2 2020	$8.2m	$8.2m
Voloridge Investment Management LLC	Q2 2024	$15m	$6.6m
Quantbot Technologies LP	Q2 2013	$4.2m	$4.2m
Balyasny Asset Management LLC	Q2 2013	$41m	last listed Q1 2026
Millennium Management LLC	Q2 2013	$34m	last listed Q3 2019
Renaissance Technologies LLC	Q4 2013	$33m	last listed Q1 2014
Man Group PLC	Q2 2024	$27m	last listed Q4 2024
Glenview Capital Management LLC	Q2 2013	$24m	last listed Q2 2013
Woodline Partners LP	Q2 2024	$19m	last listed Q2 2025
Two Sigma Advisers LP	Q3 2024	$13m	last listed Q4 2024
Tudor Investment Corp	Q4 2014	$13m	last listed Q1 2025
Marshall Wace LLP	Q1 2015	$8.1m	last listed Q4 2018
Schonfeld Strategic Advisors LLC	Q3 2025	$6.7m	last listed Q3 2025

What MWA 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 MWA →

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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The holdings, every quarter, and the week between

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