Free · no sign-up · Q2 2026

Which funds own CPRX

Catalyst Pharmaceuticals Inc in the Q2 2026 filings. At least 2 of the 91 current managers on file reported a position, worth $20m 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: $20m; as reported
Opened: 1; new this quarter
Added to: 1; already held
Trimmed or sold out: 1; 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
Soros Fund Management LLC Macro · $8.1bn book	$11m	0.1%	344,593	opened344,593	New
Winton Group Ltd Quantitative · $3.1bn book	$9.0m	0.3%	287,736	+$7.4m+220,016	Added

Sold out of this quarter

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

MFS Investment Management · Long-only$900k held before

Ownership through time

At least 5 of the 95 managers whose filings are on file listed CPRX in Q2 2026, against 1 in Q4 2014. 1 manager more than in Q1 2026: 1 started a position; 1 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

Soros Fund Management LLC$11m

Largest increases, by shares

Soros Fund Management LLCnew: 344,593 shares+$11m
Janus Henderson Group Ltd1,998,875 to 2,277,822 shares+$8.8m
Winton Group Ltd67,720 to 287,736 shares+$6.9m

Largest decreases, by shares

Renaissance Technologies LLC2,347,477 to 2,136,077 shares-$6.6m

Left it

No manager on file is shown leaving it.

Manager	First listed	Largest	Q2 2026
Janus Henderson Group Ltd	Q1 2024	$72m	$72m
Renaissance Technologies LLC	Q4 2023	$72m	$67m
Soros Fund Management LLC	Q2 2026	$11m	$11m
Winton Group Ltd	Q1 2024	$9.0m	$9.0m
Quantbot Technologies LP	Q3 2022	$1.8m	$1.8m
Two Sigma Investments LP	Q3 2022	$36m	last listed Q1 2023
Two Sigma Advisers LP	Q3 2022	$34m	last listed Q1 2023
Point72 Asset Management LP	Q4 2014	$28m	last listed Q4 2015
Marshall Wace LLP	Q4 2019	$27m	last listed Q1 2024
Voloridge Investment Management LLC	Q3 2022	$17m	last listed Q3 2024
Man Group PLC	Q3 2022	$17m	last listed Q1 2023
Acadian Asset Management LLC	Q1 2020	$13m	last listed Q3 2022
Woodline Partners LP	Q2 2023	$8.0m	last listed Q4 2024
Hudson Bay Capital Management LP	Q2 2023	$4.5m	last listed Q1 2024
Freestone Grove Partners LP	Q3 2025	$1.7m	last listed Q1 2026

What CPRX 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 CPRX →

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

Company names, tickers and logos are the trademarks of their respective owners and appear here to identify the company whose public figures are being used. L3VLUP is not affiliated with, sponsored by or endorsed by any company shown, and nothing here is a statement by or about that company. More

Provided for information purposes only, not financial advice. The holdings indexed here and anything drawn from them are illustrative, produced from assumptions you control, and must not be relied on for any investment, financial or business decision. Read the full notice

Not advice, and not a recommendation. Everything L3VLUP publishes is provided for information purposes only. Nothing here is financial, investment, legal, tax or accounting advice, a personal recommendation, or an offer or solicitation to buy or sell any security or financial instrument. It takes no account of anyone’s objectives, financial situation or needs.

Not a regulated adviser. L3VLUP does not provide regulated financial services. Speak to a suitably qualified and regulated professional before acting on anything you read here.

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.

Third-party data. Where live figures appear they come from third parties, including public filings and market feeds. They may be delayed, incomplete, restated, mis-tagged at source or simply wrong, and their providers do not endorse or verify this page. Every figure links to where it came from — check it there before relying on it. Past performance is not a guide to future performance.

Company names and logos. Names, tickers and logos are the trademarks of their owners and appear only to identify the company whose public figures are being used. L3VLUP is not affiliated with, sponsored by or endorsed by any company shown, none of them took part in preparing the exercise, and nothing here is a statement by or about any of them. See third-party names and marks.

No warranty, and limited liability. This page is provided “as is” without warranty of any kind. To the fullest extent permitted by law, L3VLUP accepts no liability for any loss or damage arising from use of, or reliance on, anything on it. Nothing in this notice limits any liability that cannot lawfully be limited.

Full terms: Information Purposes and No Advice · Terms

The holdings, every quarter, and the week between

One email a week on what moved in the market and what it means for the people interviewing into it, with the 13F changes the quarter they are filed.

One email a week, free, and you can leave at any point.