Catalyst Sponsor LLC - 10 Sep 2026 Form 4 Insider Report for Catalyst Acquisition Corp. (CATLU)

Reporting relationship: 10%+ Owner
Issuer ticker: CATLU
Reported as of: 10 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 14 Sep 2026, 16:05:02 UTC
Prior SEC filing: 31 Jul 2026
Source filing: View source filing
Reporting owner signature: /s/ Steven P. Beeks, as managing member of Catalyst Sponsor LLC

Key filing fact

Catalyst Sponsor LLC filed Form 4 for Catalyst Acquisition Corp. (CATLU) on 14 Sep 2026.

Key facts

This page summarizes Catalyst Sponsor LLC's Form 4 filing for Catalyst Acquisition Corp. (CATLU).
1 reported transaction and 1 derivative row are listed below.
Accepted by SEC: 14 Sep 2026, 16:05.

Change

Previous filing in this sequence was filed on 31 Jul 2026.
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 0002146403 Primary reporting owner

Catalyst Sponsor LLC

Relationship: 10%+ Owner
Address: C/O CATALYST ACQUISITION CORP., 1007 OCEAN AVENUE, SUITE 501, SANTA MONICA
Signature: /s/ Steven P. Beeks, as managing member of Catalyst Sponsor LLC
Signature date: 14 Sep 2026

Reported derivative securities

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

CATLU transaction Derivative

Class B Ordinary Shares

Other

Transaction value
Shares: -462,500
Change %: -8%
Price
Shares after: 5,287,500
Date: 10 Sep 2026
Ownership: Direct
Underlying class: Class A Ordinary Shares
Underlying amount: 462,500
Exercise price
Footnotes: F1, F2

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

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 2 footnotes

Footnote F1

As described in the registration statement on Form S-1 (File No. 333-297309) of Catalyst Acquisition Corp. (the "Issuer") under the heading "Description of Securities--Founder Shares," the Class B Ordinary Shares will automatically convert into Class A Ordinary Shares at the time of the Issuer's initial business combination, or at any time prior to the Issuer's initial business combination, at the option of the holder, on a one-for-one basis, subject to certain adjustments. The Class B ordinary shares have no expiration date. No consideration is payable upon conversion.

Footnote F2

As contemplated in connection with the initial public offering of the Issuer, as a result of the underwriters' partial exercise of the over-allotment option, 462,500 Class B Ordinary Shares were surrendered by Catalyst Sponsor LLC (the "Sponsor") to the Issuer for no consideration.