Catalyst Bancorp, Inc. — Director's Dealing 2025

Oct 30, 2025

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: Catalyst Bancorp, Inc. (CLST)
CIK: 0001849867
Period of Report: 2025-10-28

Reporting Person: Kleiser Kirk E. (N/A)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2025-10-28	Common Stock	S	1500	$13.43	Disposed	3250	Indirect
2025-10-28	Common Stock	S	2500	$13.39	Disposed	750	Indirect
2025-10-28	Common Stock	S	750	$13.3974	Disposed	0	Indirect
2025-10-28	Common Stock	P	100	$13.40	Acquired	13099	Indirect
2025-10-28	Common Stock	P	4650	$13.4099	Acquired	17749	Indirect

Holdings (Non-Derivative)

Security	Shares	Ownership
Common Stock	24522	Direct
Common Stock	1000	Indirect
Common Stock	5000	Indirect
Common Stock	3100	Indirect
Common Stock	900	Indirect

Holdings (Derivative)

Security	Exercise Price	Expiration	Underlying	Shares	Ownership
Stock Option (Right to Buy)	$13.30	2032-09-01	Common Stock (21160)	21160	Direct
Stock Option (Right to Buy)	$12.08	2035-06-10	Common Stock (2645)	2645	Direct

Footnotes

F1: Includes 3,384 shares granted pursuant to the Issuer's 2022 Recognition and Retention Plan and Trust Agreement that reflect the unvested portion of a grant amount originally covering 8,464 shares that commenced vesting 20% per year on September 1, 2023.

F2: The 1,000 shares are held by the K&G On the GEAUX LLC of which the reporting person is a senior managing member and 60% owner.

F3: The 5,000 shares are held by the K Kleiser LLC of which the reporting person is the sole member.

F4: The options are vesting at a rate of 20% per year commenced on September 1, 2023.

F5: The options vest at a rate of 20% per year commencing on June 10, 2026.