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Which funds own MAT

Mattel Inc in the Q2 2026 filings. At least 2 of the 91 current managers on file reported a position, worth $174m 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: 2; at least, of 91 current
Combined value: $174m; as reported
Opened: 1; new this quarter
Added to: 0; 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
Southeastern Asset Management Inc Activist · $1.9bn book	$171m	8.9%	12,322,555	-$15m-489,602	Trimmed
Caxton Associates LLP Macro · $5.3bn book	$2.8m	0.1%	200,681	opened200,681	New

Sold out of this quarter

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

Winton Group Ltd · Quantitative$7.4m held before
Quantbot Technologies LP · Quantitative$1.7m held before

Ownership through time

At least 6 of the 95 managers whose filings are on file listed MAT in Q2 2026, against 14 in Q2 2013. 1 manager fewer than in Q1 2026: 3 started positions; 1 sold out, by its own filing; 3 no longer listed it among the positions read, which can mean a holding below the listed range 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

Largest increases, by shares

Freestone Grove Partners LPnew: 1,120,413 shares+$16m
Squarepoint Ops LLC2,368,621 to 3,481,088 shares+$15m
ExodusPoint Capital Management LPnew: 442,483 shares+$6.1m
Holocene Advisors LP244,739 to 553,431 shares+$4.3m
Caxton Associates LLPnew: 200,681 shares+$2.8m

Largest decreases, by shares

Southeastern Asset Management Inc12,812,157 to 12,322,555 shares-$6.8m

Left it

Winton Group Ltdwas $7.4m

Manager	First listed	Largest	Q2 2026
Southeastern Asset Management Inc	Q3 2017	$607m	$171m
Squarepoint Ops LLC	Q4 2014	$73m	$48m
Freestone Grove Partners LP	Q4 2024	$56m	$16m
Holocene Advisors LP	Q4 2017	$37m	$7.7m
ExodusPoint Capital Management LP	Q4 2020	$16m	$6.1m
Caxton Associates LLP	Q4 2016	$5.2m	$2.8m
T. Rowe Price Associates Inc	Q2 2013	$1.4bn	last listed Q2 2025
Wellington Management Group LLP	Q2 2013	$1.1bn	last listed Q4 2014
Capital Research Global Investors	Q2 2013	$772m	last listed Q4 2024
Fidelity (FMR LLC)	Q2 2015	$596m	last listed Q1 2017
Dodge & Cox	Q4 2017	$584m	last listed Q1 2021
Artisan Partners LP	Q2 2013	$291m	last listed Q3 2015
Capital World Investors	Q4 2015	$247m	last listed Q3 2018
Invesco Ltd	Q2 2013	$216m	last listed Q2 2018
Janus Henderson Group Ltd	Q2 2013	$207m	last listed Q2 2017
MFS Investment Management	Q2 2013	$205m	last listed Q4 2025

What MAT 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 MAT →

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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