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Which funds own RARE

Ultragenyx Pharmaceutical In in the Q2 2026 filings. At least 1 of the 91 current managers on file reported a position, worth $42m 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: $42m; as reported
Opened: 0; new this quarter
Added to: 0; already held
Trimmed or sold out: 2; 1 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
Voloridge Investment Management LLC Quantitative · $23.5bn book	$42m	0.2%	1,241,556	+$12m-185,278	Trimmed

Sold out of this quarter

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

Point72 Asset Management LP · Multi-strategy$19m held before

Ownership through time

At least 7 of the 95 managers whose filings are on file listed RARE in Q2 2026, against 2 in Q1 2014. 2 managers more than in Q1 2026: 3 listed it again; 1 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

No manager on file started a position.

Largest increases, by shares

No manager on file bought more.

Largest decreases, by shares

Voloridge Investment Management LLC1,426,834 to 1,241,556 shares-$6.2m
Brevan Howard Capital Management LP215,845 to 102,768 shares-$3.8m
Moore Capital Management LP157,132 to 128,035 shares-$972k

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
AQR Capital Management LLC	Q3 2024	$214m	$214m
Two Sigma Investments LP	Q2 2015	$121m	$121m
Voloridge Investment Management LLC	Q2 2018	$41m	$41m
Walleye Capital LLC	Q2 2024	$16m	$11m
Moore Capital Management LP	Q1 2015	$14m	$4.3m
Brevan Howard Capital Management LP	Q3 2024	$4.5m	$3.4m
PDT Partners LLC	Q2 2021	$5.7m	$514k
T. Rowe Price Associates Inc	Q4 2015	$1.3bn	last listed Q3 2024
Capital Research Global Investors	Q1 2014	$1.0bn	last listed Q4 2021
Fidelity (FMR LLC)	Q1 2015	$653m	last listed Q1 2017
Wellington Management Group LLP	Q2 2015	$468m	last listed Q3 2024
Capital World Investors	Q1 2014	$433m	last listed Q2 2022
Citadel Advisors LLC	Q1 2020	$177m	last listed Q2 2021
AllianceBernstein LP	Q3 2015	$164m	last listed Q3 2024
D. E. Shaw & Co.	Q4 2020	$99m	last listed Q2 2021
Marshall Wace LLP	Q1 2015	$71m	last listed Q4 2024
Point72 Asset Management LP	Q4 2018	$67m	last listed Q1 2025

What RARE 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 RARE →

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

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