Free · no sign-up · Q2 2026

Which funds own AVTR

Avantor Inc in the Q2 2026 filings. At least 4 of the 91 current managers on file reported a position, worth $1.4bn 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: $1.4bn; as reported
Opened: 0; new this quarter
Added to: 4; already held
Trimmed or sold out: 5; 5 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
Dodge & Cox Activist · $191bn book	$1.2bn	0.6%	120,020,974	+$250m+372,645	Added
Marshall Wace LLP Quantitative · $127bn book	$130m	0.1%	13,130,158	+$103m+9,692,325	Added
Freestone Grove Partners LP Multi-strategy · $15.6bn book	$57m	0.4%	5,714,884	+$35m+2,923,727	Added
Southeastern Asset Management Inc Activist · $1.9bn book	$47m	2.4%	4,725,478	+$19m+1,205,266	Added

Sold out of this quarter

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

Wellington Management Group LLP · Long-only$190m held before
Tudor Investment Corp · Macro$18m held before
Brevan Howard Capital Management LP · Macro$3.3m held before
Moore Capital Management LP · Macro$900k held before
Maverick Capital Ltd · Long/short equity$800k held before

Ownership through time

At least 5 of the 95 managers whose filings are on file listed AVTR in Q2 2026, against 10 in Q2 2019. 4 managers fewer than in Q1 2026: 1 listed it again; 3 sold out, by their own filings; 2 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

Freestone Grove Partners LP2,791,157 to 5,714,884 shares+$29m
Southeastern Asset Management Inc3,520,212 to 4,725,478 shares+$12m
Dodge & Cox119,648,329 to 120,020,974 shares+$3.7m

Largest decreases, by shares

D. E. Shaw & Co.13,110,674 to 9,571,523 shares-$35m

Left it

Wellington Management Group LLPwas $190m
Tudor Investment Corpwas $18m
Maverick Capital Ltdwas $790k

Manager	First listed	Largest	Q2 2026
Dodge & Cox	Q3 2023	$2.1bn	$1.2bn
Marshall Wace LLP	Q2 2019	$130m	$130m
D. E. Shaw & Co.	Q4 2021	$103m	$95m
Freestone Grove Partners LP	Q4 2024	$57m	$57m
Southeastern Asset Management Inc	Q3 2025	$64m	$47m
T. Rowe Price Associates Inc	Q2 2019	$3.0bn	last listed Q4 2023
Invesco Ltd	Q4 2019	$1.1bn	last listed Q1 2024
Fidelity (FMR LLC)	Q2 2019	$794m	last listed Q2 2022
Janus Henderson Group Ltd	Q1 2022	$458m	last listed Q2 2025
Third Point LLC	Q4 2019	$455m	last listed Q1 2022
Viking Global Investors LP	Q2 2019	$449m	last listed Q3 2022
Wellington Management Group LLP	Q2 2022	$357m	last listed Q1 2026
Millennium Management LLC	Q2 2019	$233m	last listed Q1 2025
Durable Capital Partners LP	Q1 2024	$217m	last listed Q4 2024
Citadel Advisors LLC	Q2 2019	$191m	last listed Q2 2022

What AVTR 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 AVTR →

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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