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Which funds own MAS

Masco Corp in the Q2 2026 filings. At least 4 of the 91 current managers on file reported a position, worth $1.3bn 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: 4; at least, of 91 current
Combined value: $1.3bn; as reported
Opened: 0; new this quarter
Added to: 2; already held
Trimmed or sold out: 2; 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
Harris Associates LP Activist · $75.4bn book	$677m	0.9%	8,318,944	+$158m-277,790	Trimmed
MFS Investment Management Long-only · $315bn book	$373m	0.1%	4,522,430	+$108m+198,636	Added
Holocene Advisors LP Long/short equity · $44.4bn book	$176m	0.4%	2,157,324	+$17m-462,443	Trimmed
Winton Group Ltd Quantitative · $3.1bn book	$31m	1.0%	376,678	+$15m+108,788	Added

Ownership through time

At least 13 of the 95 managers whose filings are on file listed MAS in Q2 2026, against 11 in Q2 2013. 1 manager more than in Q1 2026: 4 listed it again; 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

No manager on file started a position.

Largest increases, by shares

Arrowstreet Capital LP1,071,592 to 1,276,438 shares+$17m
MFS Investment Management4,323,794 to 4,522,430 shares+$16m
Winton Group Ltd267,890 to 376,678 shares+$8.9m
Artisan Partners LP245,251 to 309,961 shares+$5.3m
Capital World Investors1,625,000 to 1,668,946 shares+$3.6m

Largest decreases, by shares

Holocene Advisors LP2,619,767 to 2,157,324 shares-$38m
Renaissance Technologies LLC1,134,114 to 683,900 shares-$37m
Wellington Management Group LLP4,235,338 to 3,789,629 shares-$36m
Harris Associates LP8,596,734 to 8,318,944 shares-$23m

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
Harris Associates LP	Q4 2018	$730m	$677m
MFS Investment Management	Q2 2019	$1.5bn	$373m
Wellington Management Group LLP	Q3 2025	$308m	$308m
AQR Capital Management LLC	Q1 2015	$220m	$188m
Holocene Advisors LP	Q4 2017	$322m	$176m
Capital World Investors	Q2 2013	$800m	$136m
Arrowstreet Capital LP	Q2 2017	$212m	$104m
Renaissance Technologies LLC	Q3 2013	$79m	$56m
Winton Group Ltd	Q4 2014	$78m	$31m
Artisan Partners LP	Q2 2019	$115m	$25m
Schonfeld Strategic Advisors LLC	Q2 2017	$18m	$13m
Bridgewater Associates LP	Q1 2014	$23m	$5.4m
Brevan Howard Capital Management LP	Q1 2024	$4.4m	$4.4m
Fidelity (FMR LLC)	Q2 2016	$1.0bn	last listed Q2 2018
Capital Research Global Investors	Q2 2013	$530m	last listed Q3 2020
T. Rowe Price Associates Inc	Q2 2013	$313m	last listed Q3 2015
Invesco Ltd	Q2 2013	$289m	last listed Q1 2025
Third Point LLC	Q1 2014	$267m	last listed Q2 2015
Citadel Advisors LLC	Q1 2016	$232m	last listed Q1 2020
Two Sigma Advisers LP	Q3 2013	$197m	last listed Q2 2021
Millennium Management LLC	Q2 2013	$173m	last listed Q2 2025
AllianceBernstein LP	Q3 2019	$159m	last listed Q2 2023
Man Group PLC	Q1 2018	$149m	last listed Q4 2024

What MAS 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 MAS →

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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