David S. Tierney - 15 Jul 2026 Form 4 Insider Report for CATALYST PHARMACEUTICALS, INC. (CPRX)

Reporting relationship: Director
Issuer ticker: CPRX
Reported as of: 15 Jul 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 17 Jul 2026, 16:15:55 UTC
Prior SEC filing: 30 Dec 2025
Source filing: View source filing
Reporting owner signature: /s/ David S. Tierney

Key filing fact

David S. Tierney filed Form 4 for CATALYST PHARMACEUTICALS, INC. (CPRX) on 17 Jul 2026.

Key facts

This page summarizes David S. Tierney's Form 4 filing for CATALYST PHARMACEUTICALS, INC. (CPRX).
11 reported transactions and 10 derivative rows are listed below.
Accepted by SEC: 17 Jul 2026, 16:15.

Change

Previous filing in this sequence was filed on 30 Dec 2025.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001292636 Primary reporting owner

Tierney David S

Relationship: Director
Address: 355 ALHAMBRA CIRCLE, SUITE 801, CORAL GABLES
Signature: /s/ David S. Tierney
Signature date: 17 Jul 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

CPRX transaction

Common Stock, par value $0.001 per share

Disposed to Issuer

Transaction value
Shares: -383,314
Change %: -100%
Price: $31.50^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Footnotes: F1

Reported derivative securities

Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.

CPRX transaction Derivative

Options to purchase common stock

Disposed to Issuer

Transaction value
Shares: -33,500
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 33,500
Exercise price: $4.64
Footnotes: F3, F5

CPRX transaction Derivative

Options to purchase common stock

Disposed to Issuer

Transaction value
Shares: -30,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 30,000
Exercise price: $3.42
Footnotes: F3, F5

CPRX transaction Derivative

Options to purchase common stock

Disposed to Issuer

Transaction value
Shares: -20,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 20,000
Exercise price: $7.07
Footnotes: F3, F5

CPRX transaction Derivative

Options to purchase common stock

Disposed to Issuer

Transaction value
Shares: -15,000
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 15,000
Exercise price: $18.59
Footnotes: F3, F5

CPRX transaction Derivative

Options to purchase common stock

Disposed to Issuer

Transaction value
Shares: -29,524
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 29,524
Exercise price: $14.15
Footnotes: F3, F6

CPRX transaction Derivative

Options to purchase common stock

Disposed to Issuer

Transaction value
Shares: -23,248
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 23,248
Exercise price: $21.12
Footnotes: F3, F6

CPRX transaction Derivative

Options to purchase common stock

Disposed to Issuer

Transaction value
Shares: -18,115
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 18,115
Exercise price: $22.77
Footnotes: F3, F6

CPRX transaction Derivative

Restricted Stock Units

Disposed to Issuer

Transaction value
Shares: -1,414
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,414
Exercise price
Footnotes: F2, F4, F6

CPRX transaction Derivative

Restricted Stock Units

Disposed to Issuer

Transaction value
Shares: -1,894
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 1,894
Exercise price
Footnotes: F2, F4, F6

CPRX transaction Derivative

Restricted Stock Units

Disposed to Issuer

Transaction value
Shares: -5,468
Change %: -100%
Price: $0.000000^*
Shares after: 0
Date: 15 Jul 2026
Ownership: Direct
Underlying class: Common Stock
Underlying amount: 5,468
Exercise price
Footnotes: F2, F4, F6

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Section 16 status

David S. Tierney is no longer subject to Section 16 filing requirements. Form 4 or Form 5 obligations may still apply in specific circumstances.

Explanation of responses 6 footnotes

Footnote F1

The reported securities were disposed of in connection with the consummation of the acquisition of the Issuer by Angelini Pharma S.p.A. (the "Merger")

Footnote F2

Each restricted stock unit represents a contingent right to receive one share of the Issuer's common stock.

Footnote F3

In connection with the consummation of the Merger, each reported stock option ("Option") was cancelled and converted into the right to receive a cash payment (without interest, and less applicable tax withholdings and other authorized deductions) equal to the product of (x) the excess of $31.50 per share over the per-share price of such Option, multiplied by (y) the total number of shares subject to such Option.

Footnote F4

In connection with the consummation of the Merger, each reported restricted stock unit ("RSU") was cancelled and converted into the right to receive a cash payment (without interest, and less applicable tax withholdings and other authorized deductions) equal to the product of (x) the excess of $31.50 per share, multiplied by (y) the number of shares subject to such RSU.

Footnote F5

Each Option was fully vested.

Footnote F6

Each Option or RSU, as applicable, vested in full in connection with the consummation of the Merger.