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Which funds own MTX

Minerals Technologies Inc in the Q2 2026 filings. At least 1 of the 91 current managers on file reported a position, worth $19m 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: 1; at least, of 91 current
Combined value: $19m; as reported
Opened: 0; new this quarter
Added to: 0; already held
Trimmed or sold out: 0; 0 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	$19m	0.2%	254,500	+$800k0	Held

Ownership through time

At least 1 of the 95 managers whose filings are on file listed MTX in Q2 2026, against 3 in Q2 2013. The same number as in Q1 2026.

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

Started in Q2 2026

No manager on file started a position.

Added to it

No manager on file added.

Cut it

No manager on file cut it.

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
GAMCO Investors Inc	Q2 2013	$20m	$19m
T. Rowe Price Associates Inc	Q3 2015	$215m	last listed Q3 2017
Wellington Management Group LLP	Q2 2014	$122m	last listed Q3 2014
Neuberger Berman Group LLC	Q3 2014	$63m	last listed Q2 2015
AQR Capital Management LLC	Q3 2016	$34m	last listed Q4 2020
Renaissance Technologies LLC	Q1 2014	$32m	last listed Q3 2014
Marshall Wace LLP	Q1 2014	$23m	last listed Q2 2020
Arrowstreet Capital LP	Q4 2019	$16m	last listed Q4 2019
Acadian Asset Management LLC	Q3 2013	$14m	last listed Q3 2024
Artisan Partners LP	Q2 2013	$13m	last listed Q4 2013
First Eagle Investment Management LLC	Q3 2023	$5.7m	last listed Q4 2024

What MTX 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 MTX →

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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Illustrative figures. Default values are plausible starting points chosen so a model has somewhere to begin. They are not data, not a view on any company, and not calibrated to anything. Outputs move with whatever you type in.

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The holdings, every quarter, and the week between

One email a week on what moved in the market and what it means for the people interviewing into it, with the 13F changes the quarter they are filed.

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