Free · no sign-up · Q2 2026

Which funds own RYTM

Rhythm Pharmaceuticals Inc in the Q2 2026 filings. At least 2 of the 91 current managers on file reported a position, worth $124m 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: $124m; 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
Woodline Partners LP Long/short equity · $32.4bn book	$84m	0.3%	758,891	+$18m0	Held
Artisan Partners LP Long-only · $63.1bn book	$39m	0.1%	354,816	+$5.4m-35,853	Trimmed

Sold out of this quarter

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

PDT Partners LLC · Quantitative$2.4m held before

Ownership through time

At least 9 of the 95 managers whose filings are on file listed RYTM in Q2 2026, against 1 in Q1 2018. 2 managers more than in Q1 2026: 3 listed it again; 1 sold out, by its own filing.

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

Capital Research Global Investors1,115,460 to 1,532,303 shares+$46m
Janus Henderson Group Ltd918,153 to 925,490 shares+$815k

Largest decreases, by shares

Point72 Asset Management LP846,801 to 414,210 shares-$48m
Artisan Partners LP390,669 to 354,816 shares-$4.0m
AllianceBernstein LP910,413 to 894,723 shares-$1.4m

Left it

PDT Partners LLCwas $2.4m

Manager	First listed	Largest	Q2 2026
T. Rowe Price Associates Inc	Q2 2026	$285m	$285m
Capital Research Global Investors	Q3 2025	$170m	$170m
Janus Henderson Group Ltd	Q2 2018	$134m	$103m
Woodline Partners LP	Q4 2023	$84m	$84m
AllianceBernstein LP	Q3 2025	$100m	$78m
Squarepoint Ops LLC	Q2 2026	$47m	$47m
Point72 Asset Management LP	Q4 2025	$74m	$46m
Artisan Partners LP	Q4 2023	$39m	$39m
ExodusPoint Capital Management LP	Q1 2019	$8.0m	$6.8m
Renaissance Technologies LLC	Q3 2025	$55m	last listed Q4 2025
Marshall Wace LLP	Q3 2024	$39m	last listed Q1 2025
Voloridge Investment Management LLC	Q4 2023	$37m	last listed Q3 2025
Balyasny Asset Management LLC	Q3 2025	$35m	last listed Q3 2025
Capital World Investors	Q4 2025	$12m	last listed Q4 2025
PDT Partners LLC	Q1 2018	$8.7m	last listed Q1 2026
Hudson Bay Capital Management LP	Q3 2023	$4.8m	last listed Q3 2023
Walleye Capital LLC	Q3 2022	$4.7m	last listed Q3 2022
Schonfeld Strategic Advisors LLC	Q2 2018	$3.0m	last listed Q3 2018
Caxton Associates LLP	Q4 2021	$628k	last listed Q3 2024

What RYTM 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 RYTM →

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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