CATALYST PHARMACEUTICALS, INC. — Director's Dealing 2025

Aug 28, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: CATALYST PHARMACEUTICALS, INC. (CPRX)
CIK: 0001369568
Period of Report: 2025-08-27

Reporting Person: Tierney David S (Director)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-08-27	Common Stock, par value $0.001 per share	M	50000	$2.24	Acquired	405620	Direct
2025-08-27	Common Stock, par value $0.001 per share	S	26000	$20.20	Disposed	379620	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2025-08-27	Options to purchase common stock	$2.24	M	50000	Disposed	2025-12-19	Common Stock (50000)	Direct

Footnotes

F1: Shares were sold on the open market to fund the exercise price and estimated taxes due from Reporting Person as a result of the exercise of the stock options reported on Table II.

F2: Represents a weighted average sales price for the shares sold. Shares were sold in a range from $20.10 to $20.32 per share.

F3: Derivative securities vested in three annual tranches beginning on December 19, 2019.