SEC Form 4 · accession 0001911094-26-000004
Catalyst Bancorp, Inc. · CLST
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Jacques L.J. Bourque
Officer — CHIEF FINANCIAL OFFICER
Period of report
Sep 1, 2026
Accepted (ET)
Sep 2, 2026 · 4:20 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001849867
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common StockF2,F3,F4 | Sep 1, 2026 | F | 131 | $17.81 | D | 4,335 | D | |
| Common StockF5 | holding | — | — | — | 861 | I | By 401(k) Plan | |
| Common StockF6 | holding | — | — | — | 2,793 | I | By ESOP | |
| Common Stock | holding | — | — | — | 100 | I | As Utma Custodian for Quinn Bourque | |
| Common Stock | holding | — | — | — | 100 | I | As Utma Custodian for Levi Bourque |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stock Option (Right to Buy)F7 | $13.30 | holding | — | — | — | — | Sep 1, 2032 | Common Stock | 5,000 | 5,000 | D |
| Stock Option (Right to Buy)F8 | $12.08 | holding | — | — | — | — | Jun 10, 2035 | Common Stock | 4,000 | 4,000 | D |
| Stock Option (Right to Buy)F9 | $15.96 | holding | — | — | — | — | Jun 10, 2036 | Common Stock | 2,000 | 2,000 | D |
Explanation of responses
- F1Disposition solely to meet tax obligation for distribution from stock benefit plan.
- F2Includes 1,600 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 June 10, 2026.
- F3Includes 400 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.
- F4Represents the grant of shares pursuant to the Issuer's 2022 Recognition and Retention Plan and Trust Agreement that vest at 20% per year commencing on June 10, 2027.
- F5Includes shares acquired in the Catalyst Bank 401(k) Plan since the last filed Form 4, based on a report dated August 27, 2026.
- F6Includes shares allocated to the reporting person's account in the ESOP since the last filed Form 4, as of December 31, 2025.
- F7These options are vesting at a rate of 20% per year that commenced on September 1, 2023.
- F8These options are vesting at a rate of 20% per year that commenced on June 10, 2026.
- F9The options vest at a rate of 20% per year commencing on June 10, 2027.