Global Self Storage, Inc.: 5%+ holders

As of November 6, 2026, one holder's latest Schedule 13D or 13G filing report owning 5% or more of Global Self Storage, Inc. The largest reported stake is Mark Campbell Winmill's, at 8.4%. 2 filings are on record since November 12, 2025 (Schedule 13D/A, December 5, 2025).

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Global Self Storage, Inc. has 2 Schedule 13D or 13G filings on record since 2025-11-12. 1 holder's latest filing reports 5% or more of common stock, $0.01 par value per share. Each figure below is the holder's own, as filed, with the filing linked.

Holders

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Companies that share a holder

• BARD ASSOCIATES INC also filed stake reports on 10 other companies: Elauwit Connection, Inc (May 2026), Mobilicom Ltd (May 2026), Modular Medical, Inc (May 2026)

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Voting and dispositive power, as filed

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The latest filing identifies Global Self Storage, Inc. by CUSIP 37955N106 and gives its principal executive office as 3814 Route 44, Millbrook, NY 12545 (SCHEDULE 13D/A, 2025-12-05).

Source of funds (Item 3)

Mr. Mark C. Winmill used personal funds to acquire 144,876 directly owned Shares. His Shares also include 182,363 restricted Shares that are subject to restrictions on transfers and forfeiture provisions and were pursuant to restricted stock awards. The forfeiture and transfer restrictions lapse over a four-year period beginning on the date of grant. Mr. Mark Winmill is Chairman of the Board, President, and Chief Executive Officer of TUXS and may be deemed to have indirect beneficial ownership of 303,758 Shares directly owned by TUXS. Mr.Mark Campbell Winmill, SCHEDULE 13D/A, 2025-12-05

Purpose of Transaction (Item 4)

Mark Campbell Winmill

The Reporting Persons acquired the Shares for investment purposes. Notwithstanding any of the foregoing, the Reporting Persons may at any time modify, change, abandon, or replace, some or all of the foregoing purposes and plans and discussions relating thereto or discontinue or re-continue such modifications, changes, abandonments, or replacements at any time.Item 4 of the SCHEDULE 13D/A filed 2025-12-05

Timeline

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Questions about who owns Global Self Storage, Inc.

Who owns Global Self Storage, Inc.?

On this page, one holder's latest ownership filing reports 5% or more of Global Self Storage, Inc.: Mark Campbell Winmill (8.4%, Schedule 13D/A, filed 2025-12-05).

When did Mark Campbell Winmill buy into Global Self Storage, Inc.?

The filings give report dates, not purchase dates. The earliest filing from Mark Campbell Winmill on this page is the Schedule 13D/A, filed 2025-12-05, reporting 8.4%. 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%); 2 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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