Jacques L.J. Bourque - 01 Sep 2025 Form 4 Insider Report for Catalyst Bancorp, Inc. (CLST)

Role
CHIEF FINANCIAL OFFICER
Signature
/s/ Jutta Codori by P.O.A. for Jacques L. J. Bourque
Issuer symbol
CLST
Transactions as of
01 Sep 2025
Transactions value $
-$1,681
Form type
4
Filing time
02 Sep 2025, 17:25:13 UTC
Previous filing
12 Jun 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Bourque Jacques L.J. CHIEF FINANCIAL OFFICER C/O CATALYST BANCORP INC, 235 N COURT ST, OPELOUSAS /s/ Jutta Codori by P.O.A. for Jacques L. J. Bourque 02 Sep 2025 0001911094

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction CLST Common Stock Tax liability -$1.68K -131 -3.51% $12.83 3.6K 01 Sep 2025 Direct F1, F2
holding CLST Common Stock 688 01 Sep 2025 By 401(k) Plan F3
holding CLST Common Stock 2.04K 01 Sep 2025 By ESOP F4
holding CLST Common Stock 100 01 Sep 2025 As Utma Custodian for Quinn Bourque
holding CLST Common Stock 100 01 Sep 2025 As Utma Custodian for Levi Bourque

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
holding CLST Stock Option (Right to Buy) 5K 01 Sep 2025 Common Stock 5K $13.30 Direct F5
holding CLST Stock Option (Right to Buy) 4K 01 Sep 2025 Common Stock 4K $12.08 Direct F6
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Disposition solely to meet tax obligation for distribution from stock benefit plan.
F2 Includes 800 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 2,000 shares that commenced vesting 20% per year on September 1, 2023.
F3 Includes shares acquired in the Catalyst Bank 401(k) Plan since the last filed Form 4, based on a report dated August 27, 2025.
F4 Includes shares allocated to the reporting person's account in the ESOP since the last filed Form 4, as of December 31, 2024.
F5 The options are vesting at a rate of 20% per year that commenced on September 1, 2023.
F6 The options vest at a rate of 20% per year commencing on June 10, 2026.