Free · no sign-up · Q2 2026

Which funds own MOS

Mosaic Co in the Q2 2026 filings. At least 1 of the 91 current managers on file reported a position, worth $388m 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: $388m; as reported
Opened: 0; new this quarter
Added to: 1; already held
Trimmed or sold out: 3; 3 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
AQR Capital Management LLC Quantitative · $287bn book	$388m	0.1%	18,292,494	+$111m+7,367,770	Added

Sold out of this quarter

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

Arrowstreet Capital LP · Quantitative$83m held before
Acadian Asset Management LLC · Quantitative$800k held before
Maverick Capital Ltd · Long/short equity$800k held before

Ownership through time

At least 7 of the 95 managers whose filings are on file listed MOS in Q2 2026, against 18 in Q2 2013. The same number as in Q1 2026: 3 started positions; 2 listed it again; 2 sold out, by their own filings; 3 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

Largest increases, by shares

AQR Capital Management LLC10,924,724 to 18,292,494 shares+$156m
Holocene Advisors LPnew: 984,226 shares+$21m
Woodline Partners LPnew: 617,106 shares+$13m
PDT Partners LLCnew: 116,593 shares+$2.5m

Largest decreases, by shares

Caxton Associates LLP90,121 to 74,838 shares-$324k

Left it

Arrowstreet Capital LPwas $83m
Maverick Capital Ltdwas $769k

Manager	First listed	Largest	Q2 2026
AQR Capital Management LLC	Q2 2015	$388m	$388m
Millennium Management LLC	Q1 2014	$140m	$140m
Holocene Advisors LP	Q4 2017	$21m	$21m
Woodline Partners LP	Q2 2025	$19m	$13m
PDT Partners LLC	Q2 2014	$8.0m	$2.5m
Caxton Associates LLP	Q3 2017	$5.3m	$1.6m
Freestone Grove Partners LP	Q4 2025	$2.5m	$1.3m
Capital World Investors	Q2 2013	$2.0bn	last listed Q4 2024
Fidelity (FMR LLC)	Q2 2018	$1.9bn	last listed Q1 2026
T. Rowe Price Associates Inc	Q1 2024	$463m	last listed Q1 2025
Invesco Ltd	Q2 2013	$365m	last listed Q3 2025
Soroban Capital Partners LP	Q4 2021	$332m	last listed Q1 2023
Wellington Management Group LLP	Q2 2013	$296m	last listed Q3 2022
D. E. Shaw & Co.	Q2 2013	$271m	last listed Q3 2025
Artisan Partners LP	Q2 2013	$266m	last listed Q4 2016
Citadel Advisors LLC	Q3 2017	$249m	last listed Q1 2020
Neuberger Berman Group LLC	Q2 2013	$239m	last listed Q4 2023

Reported as options rather than shares

A put or a call on a name is not a position in it, and the filing states the notional rather than what the option cost. These lines are listed apart for that reason and are not counted in anything above.

Rokos Capital Management LLP · calls$43m notional

What MOS 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 MOS →

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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