Ticker · CUSIP 14888U101

CPRX

CATALYST PHARMACEUTICALS INC

Healthcare·Biotechnology

···Share

Holders (tracked)

Combined shares

5,209,451

Combined value

$121.59M

Last close

$26.26

Quarter

2025Q4

Price is +12.5% vs the avg quarter-end implied price across tracked holders.

Price · 1Y$26.26+3.74 (+16.61%)H $26.31 · L $19.13 · Avg Vol 1.3M

Tracked holders · last 8 quarters

-2 vs previous quarter over the last 8.

SEC event timeline

17 events

Ken Griffin (Citadel Advisors) trimmed2026-02-17
−89,425 shares · 2025Q4
Position
D.E. Shaw & Co. trimmed2026-02-17
−94,341 shares · 2025Q4
Position
T. Rowe Price added2026-02-17
+5,106 shares · 2025Q4
Position
Wellington Management trimmed2026-02-17
−3,066 shares · 2025Q4
Position
Izzy Englander (Millennium Mgmt) trimmed2026-02-17
−185,535 shares · 2025Q4
Position
AQR Capital Management trimmed2026-02-17
−33,401 shares · 2025Q4
Position
Renaissance Technologies trimmed2026-02-12
−894,753 shares · 2025Q4
Position
Ken Fisher (Fisher Asset Mgmt) trimmed2026-02-09
−305 shares · 2025Q4
Position
Paul Tudor Jones (Tudor Investment) exited2025-12-09
−76,088 shares · 2025Q3
Position
Wellington Management added2025-11-14
+6,619 shares · 2025Q3
Position
AQR Capital Management trimmed2025-11-14
−61,370 shares · 2025Q3
Position
D.E. Shaw & Co. added2025-11-14
+31,149 shares · 2025Q3
Position
Izzy Englander (Millennium Mgmt) added2025-11-14
+749,052 shares · 2025Q3
Position
T. Rowe Price added2025-11-14
+7,977 shares · 2025Q3
Position
Renaissance Technologies added2025-11-13
+293,314 shares · 2025Q3
Position
Norges Bank (Norway SWF) exited2025-11-13
−13,766 shares · 2025Q3
Position
Norges Bank (Norway SWF) opened position2025-11-12
+91,770 shares · 2024Q3
Position

Insider activity

No insider transactions in the last 30 days.

View full insider history for CPRX →

Follow-the-investor returns

If you'd copied each holder of CPRX…

Cost basis inferred from each manager's quarter-over-quarter position changes. Sorted by % return on the position they're still holding.

Investor	First in	Cost basis	Return	Position value today
Ken Fisher (Fisher Asset Mgmt)	2021Q3	$6.08	+332.2%	$2.2M
AQR Capital Management	2017Q3	$13.11	+100.3%	$8.0M
Wellington Management	2021Q4	$13.35	+96.7%	$1.3M
Renaissance Technologies	2016Q1	$15.97	+64.4%	$69.6M
T. Rowe Price	2022Q3	$17.62	+49.0%	$19.7M
D.E. Shaw & Co.	2016Q1	$20.87	+25.9%	$283K
Izzy Englander (Millennium Mgmt)	2016Q1	$23.19	+13.2%	$26.1M
Ken Griffin (Citadel Advisors)	2016Q1	$23.29	+12.7%	$8.1M
Ken Griffin (Citadel Advisors)	2016Q1	$23.29	+12.7%	$8.1M
Ken Griffin (Citadel Advisors)	2016Q1	$23.29	+12.7%	$8.1M

Who moved on this name in 2025Q4

Position changes reported for the latest quarter, grouped by direction.

New positions0

—

Added to1

T. Rowe Price
+5,106
$119

Trimmed7

Renaissance Technologies
−894,753
$20.9M
Izzy Englander (Millennium Mgmt)
−185,535
$4.3M
D.E. Shaw & Co.
−94,341
$2.2M
Ken Griffin (Citadel Advisors)
−89,425
$2.1M
AQR Capital Management
−33,401
$780K
Wellington Management
−3,066
$72K
Ken Fisher (Fisher Asset Mgmt)
−305
$7K

Exited0

—

Institutional ownership over time

Distinct super-investors holding this ticker · combined dollar value, by quarter.

Quarter	Holders	Shares	Combined value	Δ holders
2022Q1	10	12,155,024	$100.8M	—
2022Q2	11	13,776,895	$96.6M	+1
2022Q3	13	24,344,514	$312.3M	+2
2022Q4	13	24,646,443	$458.4M	—
2023Q1	13	22,219,377	$368.4M	—
2023Q2	11	19,824,883	$266.4M	-2
2023Q3	11	19,662,325	$229.9M	—
2023Q4	10	20,313,065	$341.5M	-1
2024Q1	11	23,053,673	$367.5M	+1
2024Q2	10	24,043,448	$372.4M	-1
2024Q3	11	5,225,312	$103.9M	+1
2024Q4	11	5,637,252	$117.7M	—
2025Q1	11	5,691,594	$138.0M	—
2025Q2	11	5,391,480	$117.0M	—
2025Q3	12	6,665,771	$131.3M	+1
2025Q4	10	5,209,451	$121.6M	-2

Who owns CPRX

10 super-investors · 2025Q4

Tracked stake

5.21M

Combined value

$122M

% of shares outstanding

—

shares-out unknown

Quarter action mix

Added1Trim9

#	Manager	Shares	Value	% of book	Last action
1	Renaissance Technologies	2.65M	$62M	0.1%	Trim−894.8K
2	Izzy Englander Millennium Mgmt	993.6K	$23M	0.0%	Trim−185.5K
3	T. Rowe Price	748.8K	$17M	0.0%	Added+5.1K
4	Ken Griffin Citadel Advisors	308.5K	$7M	0.0%	Trim−89.4K
5	AQR Capital Management	303.7K	$7M	0.0%	Trim−33.4K
6	Ken Fisher Fisher Asset Mgmt	82.8K	$2M	0.0%	Trim−305
7	Wellington Management	49.9K	$1M	0.0%	Trim−3.1K
8	Ken Griffin Citadel Advisors	49.7K	$1M	0.0%	Trim−89.4K
9	Ken Griffin Citadel Advisors	11.6K	$271K	0.0%	Trim−89.4K
10	D.E. Shaw & Co.	10.8K	$252K	0.0%	Trim−94.3K

Recent moves

20 transactions

TRIMAQR Capital Management
−33,401 · 2025Q4
TRIMKen Griffin (Citadel Advisors)
−89,425 · 2025Q4
TRIMWellington Management
−3,066 · 2025Q4
TRIMIzzy Englander (Millennium Mgmt)
−185,535 · 2025Q4
TRIMD.E. Shaw & Co.
−94,341 · 2025Q4
ADDT. Rowe Price
+5,106 · 2025Q4
TRIMRenaissance Technologies
−894,753 · 2025Q4
TRIMKen Fisher (Fisher Asset Mgmt)
−305 · 2025Q4
SOLDPaul Tudor Jones (Tudor Investment)
−76,088 · 2025Q3
ADDD.E. Shaw & Co.
+31,149 · 2025Q3
ADDT. Rowe Price
+7,977 · 2025Q3
ADDIzzy Englander (Millennium Mgmt)
+749,052 · 2025Q3
TRIMAQR Capital Management
−61,370 · 2025Q3
ADDWellington Management
+6,619 · 2025Q3
SOLDNorges Bank (Norway SWF)
−13,766 · 2025Q3
ADDRenaissance Technologies
+293,314 · 2025Q3
NEWNorges Bank (Norway SWF)
+91,770 · 2024Q3
TRIMD.E. Shaw & Co.
−26,423 · 2025Q2
TRIMWellington Management
−2,088 · 2025Q2
ADDIzzy Englander (Millennium Mgmt)
+126,597 · 2025Q2

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