[Form 4] CATALYST PHARMACEUTICALS, INC. Insider Trading Activity

Rhea-AI Filing Summary

Catalyst Pharmaceuticals, Inc. (CPRX) reported an insider equity transaction by a director. The filing shows the acquisition of 947 shares of common stock, following the exercise or settlement of equity awards, bringing the director’s directly held common stock position to 7,693 shares.

The director was granted options to purchase 18,115 shares of common stock at an exercise price of $22.77 per share, expiring on November 20, 2032. In addition, the director received 5,468 restricted stock units (RSUs), each representing a right to one share of common stock upon vesting. These options and RSUs generally vest in three equal annual tranches on November 20, 2026, November 20, 2027, and November 20, 2028, with a separate RSU grant vesting in equal parts on November 21, 2025, November 21, 2026, and November 21, 2027.

Insider Trade Summary

947 shares exercised/converted

Mixed 4 txns

Insider Harper Molly

Role Director

Type	Security	Shares	Price	Value
Exercise	Restricted Stock Units	947	$0.00	--
Exercise	Common Stock, par value $0.001 per share	947	$0.00	--
Grant/Award	Options to purchase common stock	18,115	$0.00	--
Grant/Award	Restricted Stock Units	5,468	$0.00	--

Holdings After Transaction: Restricted Stock Units — 149,910 shares (Direct); Common Stock, par value $0.001 per share — 7,693 shares (Direct); Options to purchase common stock — 145,389 shares (Direct)

Footnotes (1)

1. Each restricted stock unit represents a contingent right to receive one share of the Registrant's common stock upon vesting. Derivative securities vest in equal tranches, 1/3rd on November 20, 2026, 1/3rd on November 20, 2027 and 1/3rd on November 20, 2028. Shares of common stock will be delivered to the Reporting Person upon vesting. Derivative securities vest in equal tranches, 1/3rd on November 21, 2025, 1/3rd on November 21, 2026, and 1/3rd on November 21, 2027. Shares of common stock are required to be delivered to the Reporting Person within sixty days of vesting. The first tranche of shares was delivered on November 21, 2025.

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Harper Molly

(Last) (First) (Middle)

355 ALHAMBRA CIRCLE

SUITE 801

(Street)

CORAL GABLES FL 33134

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
CATALYST PHARMACEUTICALS, INC. [ CPRX ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
11/20/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.001 per share	11/21/2025		M		947	A	(1)	7,693	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Options to purchase common stock	$22.77	11/20/2025		A		18,115		(2)	11/20/2032	Common Stock	18,115	$0	145,389	D
Restricted Stock Units	(3)	11/20/2025		A		5,468		(2)	(3)	Common Stock	5,468	$0	150,857	D
Restricted Stock Units	(3)	11/21/2025		M			947	(4)	(5)	Common Stock	947	$0	149,910	D

Explanation of Responses:

1. Each restricted stock unit represents a contingent right to receive one share of the Registrant's common stock upon vesting.

2. Derivative securities vest in equal tranches, 1/3rd on November 20, 2026, 1/3rd on November 20, 2027 and 1/3rd on November 20, 2028.

3. Shares of common stock will be delivered to the Reporting Person upon vesting.

4. Derivative securities vest in equal tranches, 1/3rd on November 21, 2025, 1/3rd on November 21, 2026, and 1/3rd on November 21, 2027.

5. Shares of common stock are required to be delivered to the Reporting Person within sixty days of vesting. The first tranche of shares was delivered on November 21, 2025.

	/s/ Molly Harper	11/24/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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