STOCK TITAN

Catalyst Bancorp CEO has 1,158 shares withheld

Catalyst Bancorp’s CEO reported a small tax-related share disposition while retaining sizable direct, indirect, and option-based exposure to CLST stock.

(Neutral)
(Neutral)
Form Type
4

Rhea-AI Filing Summary

Catalyst Bancorp, Inc. (CLST) director, president and CEO Joseph B. Zanco reported a disposition of 1,158 shares of Common Stock on September 1, 2026, at $17.81 per share, described as a payment of tax liability by delivering or withholding shares from a stock benefit plan distribution.

After this tax-withholding disposition, he holds 37,002 Common shares directly, plus additional indirect holdings through a spouse, 401(k) plan, ESOP, and IRA, and maintains several stock option awards covering underlying shares at exercise prices between $12.08 and $15.96.

Positive

  • None.

Negative

  • None.
Insider Zanco Joseph B
Role PRESIDENT AND CEO
Type Security Shares Price Value
Tax Withholding Common Stock F1, F2, F3, F4 1,158 $17.81 $21K
holding Stock Option (Right to Buy) F7 -- -- --
holding Stock Option (Right to Buy) F8 -- -- --
holding Stock Option (Right to Buy) F9 -- -- --
holding Common Stock -- -- --
holding Common Stock F5 -- -- --
holding Common Stock F6 -- -- --
holding Common Stock -- -- --
Holdings After Transaction: Common Stock — 37,002 shares (Direct); Stock Option (Right to Buy) — 79,350 contracts (Direct); Common Stock — 15,000 shares (Indirect, By Spouse); Common Stock — 2,996.5955 shares (Indirect, By 401(k) Plan); Common Stock — 8,506.7075 shares (Indirect, By ESOP); Common Stock — 22,009 shares (Indirect, By IRA)
Footnotes (9)
  1. F1. Disposition solely to meet tax obligation for distribution from stock benefit plan.
  2. F2. Includes 4,232 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 21,160 shares that commenced vesting 20% per year on September 1, 2023.
  3. F3. Includes 4,232 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 5,290 shares that commenced vesting 20% per year on June 10, 2026.
  4. F4. Represents 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.
  5. F5. Includes shares acquired in the Catalyst Bank 401(k) Plan since the last filed Form 4, based on a report dated August 27, 2026.
  6. F6. Includes shares allocated to the reporting person's account in the ESOP since the last filed Form 4, as of December 31, 2025.
  7. F7. These options are vesting at a rate of 20% per year that commenced on September 1, 2023.
  8. F8. These options are vesting at a rate of 20% per year that commenced on June 10, 2026.
  9. F9. These options vest at a rate of 20% per year commencing on June 10, 2027.
Shares disposed for tax liability 1,158 shares Common Stock used on September 1, 2026 to pay tax via share withholding
Price per share for tax-withholding disposition $17.81 per share Value assigned to the 1,158 Common shares used for tax payment
Direct Common Stock holdings after transaction 37,002 shares Directly owned by Joseph B. Zanco after September 1, 2026 disposition
Indirect holdings by spouse 15,000 shares Common Stock held indirectly through spouse
Indirect holdings by 401(k) Plan 2,996.5955 shares Common Stock in Catalyst Bank 401(k) Plan as of report dated August 27, 2026
Indirect holdings by ESOP 8,506.7075 shares Common Stock allocated to ESOP account as of December 31, 2025
Indirect holdings by IRA 22,009 shares Common Stock held indirectly via IRA
Largest option grant underlying shares 52,900 shares Underlying Common Stock for options at $13.30 exercise price expiring September 1, 2032
ESOP financial
"Includes shares allocated to the reporting person's account in the ESOP since"
An Employee Stock Ownership Plan (ESOP) is a program that gives employees ownership shares in their company, often as part of their benefits package. It acts like a company-sponsored savings plan, allowing workers to have a stake in the company's success, which can boost motivation and loyalty. For investors, ESOPs can influence company decisions and stock value, making them an important aspect of corporate ownership and governance.
401(k) Plan financial
"Includes shares acquired in the Catalyst Bank 401(k) Plan since the last"
A 401(k) plan is a workplace retirement account that lets employees set aside part of their pay into a tax-advantaged savings pot, often with employers adding matching contributions — like a workplace piggy bank for future income. It matters to investors because the amount people save and how employers fund these plans influence consumer spending, corporate payroll costs and the flow of money into financial markets, which can affect stock prices and company valuations.
Recognition and Retention Plan and Trust Agreement financial
"granted pursuant to the Issuer's 2022 Recognition and Retention Plan and Trust"
IRA financial
"Common Stock total shares following transaction 22009.0000, nature of ownership By IRA"
An individual retirement account (IRA) is a savings account designed to help people put aside money for their retirement, often with tax advantages that encourage long-term savings. It matters to investors because it can grow over time, providing financial security later in life, and offers benefits that can reduce current taxes or allow investments to compound more effectively.
Stock Option (Right to Buy) financial
"Stock Option (Right to Buy) with underlying security title Common Stock"

FAQ

What transaction did Catalyst Bancorp (CLST) CEO Joseph B. Zanco report?

He reported a disposition of 1,158 shares of Common Stock on September 1, 2026, at $17.81 per share, characterized as a payment of tax liability by delivering or withholding securities from a stock benefit plan distribution.

Why were CLST shares disposed of in this Form 4 filing?

The filing states the 1,158-share disposition was made solely to meet a tax obligation for a distribution from a stock benefit plan, using shares to satisfy the tax liability rather than an open-market sale.

How many CLST shares does the CEO hold directly after this transaction?

Following the September 1, 2026 tax-withholding disposition, Joseph B. Zanco directly holds 37,002 shares of Catalyst Bancorp Common Stock, including unvested shares granted under the 2022 Recognition and Retention Plan and Trust Agreement.

What indirect holdings in CLST stock does the CEO report?

He reports indirect ownership of 15,000 shares by spouse, 2,996.5955 shares in a 401(k) Plan, 8,506.7075 shares in an ESOP, and 22,009 shares by IRA, in addition to his direct holdings.

Was the CLST CEO’s September 1, 2026 transaction under a Rule 10b5-1 trading plan?

No. The filing’s Rule 10b5-1 checkbox is not marked as an affirmative plan, and the transaction is instead described in a footnote as solely to meet tax obligation for a stock benefit plan distribution.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4
FORM 4UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940
OMB APPROVAL
OMB Number:3235-0287
Estimated average burden
hours per response:0.5
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.
1. Name and Address of Reporting Person*
Zanco Joseph B

(Last)(First)(Middle)
C/O CATALYST BANCORP INC
235 N COURT ST

(Street)
OPELOUSAS LOUISIANA 70570

(City)(State)(Zip)

UNITED STATES

(Country)
2. Issuer Name and Ticker or Trading Symbol
Catalyst Bancorp, Inc. [ CLST ]
5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
XDirector10% Owner
XOfficer (give title below)Other (specify below)
PRESIDENT AND CEO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
09/01/2026
6. Individual or Joint/Group Filing (Check Applicable Line)
XForm filed by One Reporting Person
Form filed by More than One Reporting Person
4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year)2A. Deemed Execution Date, if any (Month/Day/Year)3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeVAmount(A) or (D)Price
Common Stock09/01/2026F(1)1,158D$17.8137,002(2)(3)(4)D
Common Stock15,000IBy Spouse
Common Stock2,996.5955(5)IBy 401(k) Plan
Common Stock8,506.7075(6)IBy ESOP
Common Stock22,009IBy IRA
Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year)3A. Deemed Execution Date, if any (Month/Day/Year)4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 6. Date Exercisable and Expiration Date (Month/Day/Year)7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount or Number of Shares
Stock Option (Right to Buy)$13.3 (7)09/01/2032Common Stock52,90052,900D
Stock Option (Right to Buy)$12.08 (8)06/10/2035Common Stock13,22513,225D
Stock Option (Right to Buy)$15.96 (9)06/10/2036Common Stock13,22513,225D
Explanation of Responses:
1. Disposition solely to meet tax obligation for distribution from stock benefit plan.
2. Includes 4,232 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 21,160 shares that commenced vesting 20% per year on September 1, 2023.
3. Includes 4,232 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 5,290 shares that commenced vesting 20% per year on June 10, 2026.
4. Represents 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.
5. Includes shares acquired in the Catalyst Bank 401(k) Plan since the last filed Form 4, based on a report dated August 27, 2026.
6. Includes shares allocated to the reporting person's account in the ESOP since the last filed Form 4, as of December 31, 2025.
7. These options are vesting at a rate of 20% per year that commenced on September 1, 2023.
8. These options are vesting at a rate of 20% per year that commenced on June 10, 2026.
9. These options vest at a rate of 20% per year commencing on June 10, 2027.
/s/ Jutta Codori by P.O.A. Joseph B. Zanco09/02/2026
** Signature of Reporting PersonDate
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)