SEC Form 4 · accession 0001885818-26-000004
Catalyst Bancorp, Inc. · CLST
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Kirk E. Kleiser
Director
Period of report
Sep 16, 2026
Accepted (ET)
Sep 18, 2026 · 4:32 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 16, 2026 | M | 529 | $12.08 | A | 45,887 | D | |
| Common Stock | Sep 16, 2026 | M | 16,928 | $13.30 | A | 45,358 | D | |
| Common Stock | holding | — | — | — | 20,099 | I | By IRA | |
| Common Stock | holding | — | — | — | 4,100 | I | By Spouse in IRA | |
| Common Stock | holding | — | — | — | 900 | I | By Spouse |
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)F5 | $13.30 | Sep 16, 2026 | M | 16,928 | D | — | Sep 1, 2032 | Common Stock | 16,928 | 4,232 | D |
| Stock Option (Right to Buy)F1 | $12.08 | Sep 16, 2026 | M | 529 | D | — | Jun 10, 2035 | Common Stock | 529 | 2,116 | D |
| Stock Option (Right to Buy)F6 | $15.96 | holding | — | — | — | — | Jun 10, 2036 | Common Stock | 2,645 | 2,645 | D |
Explanation of responses
- F1The options are vesting at a rate of 20% per year commenced on June 10, 2026. As of the date of this filing 529 options were exercised.
- F2Includes 1,058 shares granted pursuant to the Issuer's 2022 Recognition and Retention Plan and Trust Agreement that vest at 20% per year commencing on June 10, 2027.
- F3Includes 847 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 1,058 shares that commenced vesting 20% per year on June 10, 2026.
- F4Includes 1,696 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.
- F5The options are vesting at a rate of 20% per year commenced on September 1, 2023. As of the date of this filing 16,928 options were exercised.
- F6The options vest at a rate of 20% per year commencing on June 10, 2027.