As of November 6, 2026, 3 holders' latest Schedule 13D or 13G filings report owning 5% or more of Seneca Bancorp, Inc. The largest reported stake is Zames Mark's, at 9.2%. 4 filings are on record since October 21, 2025 (Schedule 13D, October 21, 2025).
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Key facts
- · Holder: Amended and Restated Seneca Savings Bank, National Association Employee Stock Ownership Plan Trust · Percent: 8.9% · SCHEDULE 13G
- · Holder: Minerva Advisors LLC · Percent: 6% · SCHEDULE 13G/A
- · Holder: Minerva Advisors LLC · Percent: 6% · SCHEDULE 13G
- · Holder: Zames Mark · Percent: 9.2% · SCHEDULE 13D
Seneca Bancorp, Inc. has 4 Schedule 13D or 13G filings on record since 2025-10-21. 3 holders' latest filing reports 5% or more of common stock, par value $0.01 per share. Each figure below is the holder's own, as filed, with the filing linked.
Holders
| Holder | Percent | Shares | Latest | Event date |
|---|---|---|---|---|
| 9.2% | 165,023 | SCHEDULE 13D, 2025-10-21 | 2025-10-15 | |
| Amended and Restated Seneca Savings Bank, National Association Employee Stock Ownership Plan Trust | 8.9% | 158,710 | SCHEDULE 13G, 2026-03-02 | 2025-12-31 |
| Minerva Advisors LLC | 6% | 108,052 | SCHEDULE 13G/A, 2026-02-13 | 2025-12-31 |
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More on Seneca Bancorp, Inc. and the records around it.
Seneca Bancorp, Inc. elsewhere on the record
- Leadership changes Sep 2026
Companies that share a holder
- Minerva Advisors LLC also filed stake reports on 10 other companies: Kewaunee Scientific Corporation (Jun 2026), DLH Holdings Corp. (Feb 2026), The Eastern Company (Feb 2026)
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Purpose of Transaction (Item 4)
Zames Mark
The shares covered by this Schedule 13D are being held for investment purposes. Mr. Zames may, from time to time, acquire additional securities of the Issuer using personal funds through a broker and/or privately negotiated transactions or dispose of securities. Mr. Zames does not currently have specific plans or proposals for the Issuer but as a director of the Issuer will continue to evaluate plans or proposals for transactions if applicable such as the acquisition or disposition of securities of the Issuer, mergers or acquisitions relating to the Issuer or its subsidiaries, changes in the board of directors or management of the Issuer, changes in the capitalization or dividend policy of the Issuer, changes in the Issuer's business, changes in the Issuer's Articles of Incorporation or Bylaws or other similar related transactions.Item 4 of the SCHEDULE 13D filed 2025-10-21
Timeline
| Filed | Holder | Percent | Filing |
|---|---|---|---|
| 2025-10-21 | Zames Mark | 9.2% | SCHEDULE 13D |
| 2025-11-20 | Minerva Advisors LLC | 6% | SCHEDULE 13G |
| 2026-02-13 | Minerva Advisors LLC | 6% | SCHEDULE 13G/A |
| 2026-03-02 | Amended and Restated Seneca Savings Bank, National Association Employee Stock Ownership Plan Trust | 8.9% | SCHEDULE 13G |
Questions about who owns Seneca Bancorp, Inc.
Who owns Seneca Bancorp, Inc.?
On this page, 3 holders' latest ownership filings report 5% or more of Seneca Bancorp, Inc.: Zames Mark (9.2%, Schedule 13D, filed 2025-10-21), Amended and Restated Seneca Savings Bank, National Association Employee Stock Ownership Plan Trust (8.9%, Schedule 13G, filed 2026-03-02) and Minerva Advisors LLC (6%, Schedule 13G/A, filed 2026-02-13).
Who are the largest shareholders of Seneca Bancorp, Inc.?
By the share each holder's latest filing reports, the largest holders of Seneca Bancorp, Inc. on this page are Zames Mark (9.2%), Amended and Restated Seneca Savings Bank, National Association Employee Stock Ownership Plan Trust (8.9%) and Minerva Advisors LLC (6%).
When did Zames Mark buy into Seneca Bancorp, Inc.?
The filings give report dates, not purchase dates. The earliest filing from Zames Mark on this page is the Schedule 13D, filed 2025-10-21, reporting 9.2%.
Is this an audit or a full list?
Neither. The ownership list on this page covers only Schedule 13D and 13G filings, which holders make once they own 5% or more of a class of shares (an amendment can report a stake that has since fallen below 5%); 4 such filings are shown here. It is not an audit and not a full cap table: holders who never reached 5% are not listed, and a stake can change after its latest filing.
Also on the record for Seneca Bancorp, Inc.
| Date | Record | Figure | Our page | Source |
|---|---|---|---|---|
| September 8, 2026 | Leadership change: Kimberly A. Boynton departs, Director | — | Leadership changes | Source |
| June 4, 2026 | Leadership change: Vincent Fazio departs, Chief Financial Officer, and 1 more | — | Leadership changes | Source |
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Where this comes from
Anyone who comes to own more than 5% of a class of a listed company's voting shares has to tell the SEC. A holder who may seek to change or influence the company files Schedule 13D, and has to say in Item 4, "Purpose of Transaction", what it intends to do. A holder with no such intent, such as many index and passive funds, may file the shorter Schedule 13G. Both are amended when the stake changes, including when it falls below 5%.
Every row here is one of those filings, linked to the filing itself. Percentages and share counts are exactly as the holder filed them, for the holder the filing names; an amendment showing a lower figure is shown as filed. Item 4 text is quoted word for word. Where a 13D's Item 4 contains a sentence stating a definite intent to influence the company, that sentence is marked and quoted; the page does not describe the holder or its motives beyond the words it filed. Nothing here is investment advice.