American Shared Hospital Services: 5%+ holders

As of November 10, 2026, one holder's latest Schedule 13D or 13G filing report owning 5% or more of American Shared Hospital Services. The largest reported stake is Stachowiak Raymond C's, at 35.3%. 5 filings are on record since December 9, 2025 (Schedule 13D/A, July 30, 2026).

Anita G. Zucker also filed stake reports on 2 other companies ↓

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Key facts

• Filing 2026-07-30 · Reporting person: Stachowiak Raymond C · Sole voting: 120,678 · Shared voting: 2,319,527 · Sole dispositive: 120,678 · Shared dispositive: 2,319,527 · SCHEDULE 13D/A, 2026-07-30
• Filed 2026-06-25 · Holder: Stachowiak Raymond C · Percent: 33% · SCHEDULE 13D/A
• Filing 2026-06-23 · Reporting person: Anita G. Zucker · Sole voting: 0 · Shared voting: 0 · Sole dispositive: 0 · Shared dispositive: 0 · SCHEDULE 13D/A, 2026-06-23
• Filed 2025-12-16 · Holder: Ruffle John F · Percent: 0% · SCHEDULE 13D/A
• Filed 2025-12-09 · Holder: Stachowiak Raymond C · Percent: 23.7% · SCHEDULE 13D/A

American Shared Hospital Services has 5 Schedule 13D or 13G filings on record since 2025-12-09. 1 holder's latest filing reports 5% or more of common stock, no par value. Each figure below is the holder's own, as filed, with the filing linked.

Holders

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More on American Shared Hospital Services and the records around it.

American Shared Hospital Services elsewhere on the record

• Leadership changes Jul 2026
• Who owns it

Companies that share a holder

• Anita G. Zucker also filed stake reports on 2 other companies: UNION BANKSHARES INC (May 2026)

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What the Full Report on American Shared Hospital Services covers

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4. Who Runs It, And How To Reach Them

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Voting and dispositive power, as filed

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The latest filing identifies American Shared Hospital Services by CUSIP 029595105 and gives its principal executive office as 601 MONTGOMERY STREET, SUITE 850, SAN FRANCISCO, CA 94111 (SCHEDULE 13D/A, 2026-07-30).

Source of funds (Item 3)

This Schedule 13D/A No. 10 supplements Item 3 of the Original Schedule 13D by adding the following: Source of Mr. Stachowiak's Shares. The aggregate number of Common Shares reported as beneficially owned (the "Total Beneficial Ownership Amount") by Mr. Stachowiak in this Schedule 13 D/A No. 10 includes the Common Shares acquired or disposed of in the transactions described below that occurred since Mr. Stachowiak's reporting of beneficial ownership in the Schedule 13D/A No. 9. - On March 26, 2026, Mr.Stachowiak Raymond C, SCHEDULE 13D/A, 2026-07-30

Purpose of Transaction (Item 4)

Stachowiak Raymond C

This Schedule 13D/A No. 10 amends and restates Item 4 of the Original Schedule 13D as follows: The information reported in Item 3 of this Schedule 13D/A No. 10 is incorporated by reference into this Item 4. The Common Shares reported as beneficially owned by the Reporting Persons will be held for investment purposes. On July 22, 2026, the Issuer issued the Warrant to RCS/TIG exercisable for 220,000 shares of Common Stock pursuant to a Note and Warrant Purchase Agreement. Mr. Stachowiak is a director and the Executive Chairman of the Board of the Issuer, the owner-president of RCS, the owner-manager of Stachowiak Equity, and the owner-manager of RCS/TIG. Except as set forth herein and to the extent that Mr. Stachowiak may have influence over the corporate activities of the Issuer, including activities that may relate to the items described in subparagraphs (a) through (j) of Item 4 of Schedule 13D, the Reporting Persons do not have any present plan or proposal that relate to or would result in any of the matters set forth in subparagraphs (a) through (j) of Item 4 of Schedule 13D. The Reporting Persons reserve the right to increase or decrease their position in the Issuer through, among other things, the purchase or sale of securities of the Issuer on the open market or in private transactions or otherwise on such terms and at such times as the Reporting Persons may deem advisable. The Reporting Persons reserve the right to change their intention with respect to any and …The first part of Item 4 of the SCHEDULE 13D/A filed 2026-07-30; the filing has the rest

Ruffle John F

The information reported in Item 3 of this Schedule 13D is incorporated by reference into this Item 4 to the extent applicable. Mr. Ruffle donated the Transferred Shares to the Foundation for estate planning and charitable purposes. Mr. Ruffle does not have any current plans or proposals that relate to or would result in any of the matters specified in subparagraphs (a) through (j) of Item 4 of Schedule 13D. Mr. Ruffle reserves the right to increase or decrease his position in the Issuer through, among other things, the purchase or sale of securities of the Issuer on the open market, in private transactions, or otherwise, on such terms and at such times as Mr. Ruffle may deem advisable.Item 4 of the SCHEDULE 13D/A filed 2025-12-16

Timeline

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Questions about who owns American Shared Hospital Services

Who owns American Shared Hospital Services?

On this page, one holder's latest ownership filing reports 5% or more of American Shared Hospital Services: Stachowiak Raymond C (35.3%, Schedule 13D/A, filed 2026-07-30).

When did Stachowiak Raymond C buy into American Shared Hospital Services?

The filings give report dates, not purchase dates. The earliest filing from Stachowiak Raymond C on this page is the Schedule 13D/A, filed 2025-12-09, reporting 23.7%; its latest, Schedule 13D/A filed 2026-07-30, reports 35.3%. That earliest filing is itself an amendment, which updates an earlier report.

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%); 5 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.

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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.

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