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SCHEDULE 13D/A Filed 2026-08-27 Event 2026-08-27 SEC 0000921895-26-002340 →

Stilwell Joseph → Catalyst Bancorp, Inc. CLST

Stake: 9.00% Shares: 364,085 CUSIP: 14888L101 Class: Common Stock, par value $0.01 per share

Item 4 — Purpose of Transaction

We are filing this Third Amendment to announce that we have served our notice of intent to nominate Mark D. Alcott for election as a director at the Issuer's upcoming 2027 annual meeting of shareholders (the "2027 Annual Meeting"), with Corissa B. Porcelli as our alternate nominee. Copies of the Nominee Agreements (as defined below) are attached as Exhibits 2 and 3 to this Third Amendment. Additionally, we have submitted a non-binding proposal (the "Sale Proposal") seeking shareholder approval of a request that the Board shall take all necessary steps to promptly effectuate a sale of the Issuer. A copy of the Sale Proposal is attached hereto as Exhibit 5 and is incorporated herein by reference. Our purpose in acquiring shares of Common Stock of the Issuer is to profit from the appreciation in the market price of the shares of Common Stock through asserting shareholder rights. We do not believe the value of the Issuer's assets is adequately reflected in the current market price of the Issuer's Common Stock. THIS THIRD AMENDMENT MAY BE DEEMED TO BE SOLICITATION MATERIAL IN RESPECT OF THE SOLICITATION OF PROXIES BY THE 13D GROUP FROM THE ISSUER'S SHAREHOLDERS IN CONNECTION WITH THE ISSUER'S 2027 ANNUAL MEETING. SECURITY HOLDERS ARE ADVISED TO READ THE PROXY STATEMENT AND OTHER DOCUMENTS RELATING TO THE SOLICITATION BY THE 13D GROUP AND OTHER PARTICIPANTS OF PROXIES FROM THE ISSUER'S SHAREHOLDERS FOR USE AT THE ISSUER'S 2027 ANNUAL MEETING OF SHAREHOLDERS WHEN THEY BECOME AVAILABLE BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION, INCLUDING INFORMATION RELATING TO THE PARTICIPANTS IN OUR PROXY SOLICITATION. INFORMATION RELATING TO THE PARTICIPANTS IN OUR PROXY SOLICITATION IS INCLUDED IN SCHEDULE A, ATTACHED HERETO AND INCORPORATED BY REFERENCE HEREIN. Members of the 13D Group may seek to make additional purchases or sales of shares of Common Stock. Except as described in this filing, no member of the 13D Group has any plans or proposals which relate to, or could result in, any of the matters referred to in paragraphs (a) through (j), inclusive, of Item 4 of Schedule 13D. Members of the 13D Group may, at any time and from time to time, review or reconsider their positions and formulate plans or proposals with respect thereto. Since 2000, members or affiliates of the Stilwell Group have taken an 'activist position' in 80 other publicly-traded companies. In each instance, our purpose has been to profit from the appreciation in the market price of the shares we held by asserting shareholder rights. In addition, we believed that the values of the companies' assets were not adequately reflected in the market prices of their shares. Our actions with respect to such publicly-traded companies are described in Schedule B, attached hereto and incorporated herein by reference.

Cross-References

Insider Activity (last 365d)
14 transactions
12 buys · 2 sales · 0 awards/exercises
Issuer Cluster
3 13D/G filings on this issuer
2 other filings besides this one
Filer Track Record
72 filings by this filer
71 other filings in the data moat
Short Interest · settle 2026-09-30
DTC 2.65
5,965 shares short · -21.1% vs prior

Form 4 Insider Transactions · last 365d

DateInsiderRoleTypeSharesPriceValue
2026-06-10 Kleiser Kirk E. director Sale 5,000 $16.04 $80K
2026-06-10 Kleiser Kirk E. director Sale 1,000 $16.04 $16K
2026-06-10 Kleiser Kirk E. director Award 1,058 — —
2026-06-10 Kleiser Kirk E. director Buy 2,850 $16.13 $46K
2026-06-10 Kleiser Kirk E. director Buy 2,350 $16.09 $38K
2026-06-10 Kleiser Kirk E. director Buy 1,000 $16.11 $16K
2026-06-10 Zanco Joseph B director, officer Award 5,290 — —
2026-06-10 Zanco Joseph B director, officer Award 13,225 $15.96 $211K
2026-06-10 LeBouef Craig C. director Award 1,058 — —
2026-06-10 LeBouef Craig C. director Award 2,645 $15.96 $42K
2026-06-10 Lafleur Frederick R. director Award 1,058 — —
2026-06-10 Lafleur Frederick R. director Award 2,645 $15.96 $42K
2026-06-10 Kidder Todd A. director Award 1,058 — —
2026-06-10 Kidder Todd A. director Award 2,645 $15.96 $42K

Other 13D/G Filings on Catalyst Bancorp, Inc.

FiledFormFilerStakeShares
2026-04-13 SCHEDULE 13D/A Stilwell Joseph 8.60% 348,590 view →
2026-01-12 SCHEDULE Stilwell Joseph 6.30% 260,009 view →

Other Filings by Stilwell Joseph

FiledFormIssuerStakeShares
2026-08-19 SCHEDULE 13D/A Wheeler Real Estate Investment Trust, Inc. — 2,433,708 view →
2026-08-06 SCHEDULE 13D CSB Financial Inc. 9.90% 139,000 view →
2026-08-04 SCHEDULE 13D/A PEOPLES FINANCIAL CORP /MS/ — 795,745 view →
2026-07-09 SCHEDULE 13D/A Central Plains Bancshares, Inc. CPBI 9.70% 406,874 view →
2026-06-23 SCHEDULE 13D/A Central Plains Bancshares, Inc. CPBI — 406,874 view →
2026-05-20 SCHEDULE 13D/A Central Plains Bancshares, Inc. CPBI 8.70% 366,901 view →
2026-04-13 SCHEDULE 13D/A Catalyst Bancorp, Inc. CLST 8.60% 348,590 view →
2026-01-22 SCHEDULE PEOPLES FINANCIAL CORP /MS/ PFBX 15.00% 691,112 view →
2026-01-12 SCHEDULE Catalyst Bancorp, Inc. CLST 6.30% 260,009 view →
2025-04-02 SCHEDULE KINGSWAY FINANCIAL SERVICES INC KFS 21.60% 5,968,290 view →
2025-02-14 SCHEDULE KINGSWAY FINANCIAL SERVICES INC KFS 25.20% 6,968,290 view →
2025-01-27 SCHEDULE PEOPLES FINANCIAL CORP /MS/ PFBX 14.00% 647,264 view →
2024-01-22 SC PEOPLES FINANCIAL CORP /MS/ PFBX — — view →
2023-10-31 SC Provident Bancorp, Inc. /MD/ — — view →
2023-10-03 SC PEOPLES FINANCIAL CORP /MS/ PFBX — — view →
2023-10-02 SC Wheeler Real Estate Investment Trust, Inc. WHLRL — — view →
2023-05-12 SC Sound Financial Bancorp, Inc. SFBC — — view →
2023-03-14 SC KINGSWAY FINANCIAL SERVICES INC KFS — — view →
2023-01-25 SC PEOPLES FINANCIAL CORP /MS/ PFBX — — view →
2022-09-21 SC Cincinnati Bancorp, Inc. — — view →
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