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 Expires: December 31, 2014 Estimated average burden hours per response: 0.5
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1. Name and Address of Reporting Person * Catalyst Sponsor LLC (Last) (First) (Middle) C/O CATALYST ACQUISITION CORP. 1007 OCEAN AVENUE, SUITE 501 (Street) SANTA MONICA CA 90403 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol Catalyst Acquisition Corp. [ CATLU ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) Director X 10% Owner Officer (give title below) Other (specify below)
	3. Date of Earliest Transaction (Month/Day/Year) 07/29/2026
	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
Class A ordinary shares	07/29/2026		P		270,000 (1)	A	$ 10	270,000	D (2)

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
Right to receive one-seventh of one Class A ordinary share	(3)	07/29/2026		P		270,000 (3)		(3)	(3)	Class A Ordinary Shares	38,571 (3)	(3)	270,000	D (2)

Explanation of Responses:

1. Reflects the 270,000 Class A ordinary shares of Catalyst Acquisition Corp. (the "Issuer") that are included in the 270,000 private placement units of the Issuer purchased by Catalyst Sponsor LLC ("Sponsor"). Each private placement unit was purchased for $10 per unit and consists of one Class A ordinary share and one right to receive one-seventh (1/7) of one Class A ordinary share upon consummation of the Issuer's initial business combination.

2. Each of Steven P. Beeks, Nicolas A. van Dyk and Craig A. Elson is a managing member of the Sponsor. Any action by the Sponsor with respect to the securities held by the Sponsor, including voting and dispositive decisions, requires a majority vote of the managing members. Under the so-called "rule of three," because voting and dispositive decisions are made by a majority of the Sponsor's managing members, none of the managing members of the Sponsor is deemed to be a beneficial owner of the Sponsor's securities, even those in which such managing member holds a pecuniary interest. Accordingly, none of the managing members of the Sponsor is deemed to have or share beneficial ownership of the securities held by the Sponsor.

3. Represents the 38,571 Class A ordinary shares, which may be acquired by Sponsor upon the conversion of 270,000 rights (included in the Sponsor's private placement units) upon consummation of the registrant's initial business combination. As described in the Registration Statement under the heading "Description of Securities-Share Rights," each right will automatically convert into one-seventh (1/7) of one Class A ordinary share upon consummation of the Issuer's initial business combination, subject to certain adjustments described therein. No fractional Class A ordinary shares will be issued upon conversion of such rights.

	/s/ Steven P. Beeks, as managing member of Catalyst Sponsor LLC	07/31/2026
	** Signature of Reporting Person	Date
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