SCHEDULE 13D

See Item 2(a).

See Item 2(a).

None.

None.

Mark C. Winmill and Thomas B. Winmill are citizens of the United States of America.

Mr. Mark C. Winmill used personal funds to acquire 128,476 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 Winmill is a trustee of the Winmill Family Trust, which owns all of the voting stock of Winco, and may be deemed to have indirect beneficial ownership of 40,183 Shares directly owned by Winco. Additionally, MSG, a wholly owned subsidiary of Winco, directly owns 135,101 Shares and approximately 19% of TUXS' outstanding shares of common stock and may be deemed to have indirect beneficial ownership of the Shares directly owned by TUXS. Mr. Mark Winmill also is a trustee of the Michael M. George Trust and may be deemed to have indirect beneficial ownership of 21,997 Shares directly owned by the Michael M. George Trust. Mr. Mark Winmill disclaims beneficial ownership of the Shares owned, or which may be deemed to be owned, by TUXS, the Trust, Winco, MSG, and the Michael M. George Trust. Mr. Thomas B. Winmill used personal funds to acquire 1,100 directly owned Shares. Mr. Thomas Winmill is a trustee of the Trust and may be deemed to have indirect beneficial ownership of the 479,042 Shares directly and indirectly owned by Winco as a result of his status as a controlling person of the Trust. Mr. Thomas Winmill disclaims beneficial ownership of the Shares owned, or which may be deemed to be owned, by TUXS, the Trust, Winco, and MSG. Winco has direct beneficial ownership of 40,183 Shares and may be deemed to have indirect beneficial ownership of 303,758 Shares held by TUXS. MSG directly owns 135,101 Shares and approximately 19% of TUXS' outstanding shares of common stock and may be deemed to have indirect beneficial ownership of the Shares directly owned by TUXS. Winco disclaims beneficial ownership of the 303,758 Shares held by TUXS. Winco used working capital to acquire Shares. The Trust owns all of the voting stock of Winco. TUXS directly owns 303,758 Shares. TUXS used working capital to acquire Shares.

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.

As of May 8, 2025 there were 11,338,391 Shares outstanding, as reported by the Issuer on its Quarterly Report on Form 10-Q filed with the SEC on May 9, 2025. Based on the Shares outstanding as of May 8, 2025: Mark C. Winmill may be deemed to be the beneficial owner of 823,877.2890 Shares which constitute approximately 7.3% of the outstanding Shares, as follows: (i) 322,838.2890 Shares in which he possesses sole voting power and dispositive power and (ii) 501,039 Shares in which he shares voting power and dispositive power with one or more Reporting Persons. Mr. Mark Winmill disclaims beneficial ownership of the Shares owned, or which may be deemed to be owned, by TUXS, the Trust, Winco, MSG, and the Michael M. George Trust. Thomas B. Winmill may be deemed to be the beneficial owner of 480,142 Shares which constitute approximately 4.2% of the outstanding Shares, as follows: (i) 1,100 Shares in which he possesses sole voting power and dispositive power and (ii) 479,042 Shares in which he shares voting power and dispositive power with one or more Reporting Persons. Mr. Thomas Winmill disclaims beneficial ownership of the Shares owned, or which may be deemed to be owned, by TUXS, the Trust, Winco, and MSG. Winco may be deemed to be the beneficial owner of 479,042 Shares which constitute approximately 4.2% of the outstanding Shares, as follows: (i) 40,183 Shares in which it possesses sole voting power and dispositive power and (ii) 438,859 Shares in which it shares voting power and dispositive power with one or more Reporting Persons. Winco disclaims beneficial ownership of the Shares held by TUXS. The Trust may be deemed to be the beneficial owner of 479,042 Shares which constitute approximately 4.2% of the outstanding Shares, over which such Shares it may be deemed to share voting power and dispositive power with one or more Reporting Persons. The Trust disclaims beneficial ownership of all the Shares. TUXS may be deemed to be the direct beneficial owner of 303,758 Shares which constitute approximately 2.7% of the outstanding Shares. Information required by Instruction C of Schedule 13D with respect to other directors and executive officers of and trustees is attached hereto as Exhibit A, Item 5 and is incorporated herein by reference.

Mark C. Winmill, Thomas B. Winmill, TUXS, Winco, MSG, and the Michael M. George Trust have the power to vote and to dispose of their respective directly owned Shares.

During the past 60 days, the following transactions were effected in the Shares by the Reporting Persons: Reporting Person: Mark C. Winmill Date: 03/25/2025 Transaction: Award Number of Shares: 12,672 Price per Share: $5.08 Where and How Transaction Effected: Award(1) Reporting Person: Mark C. Winmill Date: 03/25/2025 Transaction: Award Number of Shares: 12,672 Price per Share: $4.32 Where and How Transaction Effected: Award(2) Reporting Person: Tuxis Corporation Date: 05/15/2025 Transaction: Buy Number of Shares: 9,680 Price per Share: $5.208 Where and How Transaction Effected: Open Market Purchase Reporting Person: Tuxis Corporation Date: 05/16/2025 Transaction: Buy Number of Shares: 9,600 Price per Share: $5.2248 Where and How Transaction Effected: Open Market Purchase Reporting Person: Mark C. Winmill Date: 05/19/2025 Transaction: Buy Number of Shares: 10,000 Price per Share: $5.67 Where and How Transaction Effected: Open Market Purchase 1. Shares will be earned based upon achieving certain 2025 performance targets, then will vest 6.25% quarterly retroactively from 2025 over a four year period. The Reporting Person has dividend and voting rights on all of these shares, including unvested shares. 2. Shares earned based on achieving certain 2024 performance targets. The shares will vest 6.25% quarterly retroactively from 2024 over a four year period. The Reporting Person has voting and dividend rights on all of these shares, including unvested shares.

Mark C. Winmill, Thomas B. Winmill, TUXS, Winco, MSG, and the Michael M. George Trust have the right to receive and the power to direct the receipt of dividends from, or the proceeds from the sale of, their respective directly owned Shares.

Not applicable.

On November 23, 2016, the Issuer entered into a purchase agreement (the "Purchase Agreement") with TUXS, an Issuer affiliate, to acquire all of the membership interests of each of Tuxis Self Storage I LLC, Tuxis Self Storage II LLC, and Tuxis Real Estate II LLC, each a wholly owned subsidiary of TUXS (collectively, the "TUXS Subsidiaries"), for the aggregate purchase price of $7,800,000, comprised of $5,925,000 payable in cash, $975,000 in Shares, and, contingent upon the satisfaction of certain conditions described in the Purchase Agreement, an additional $900,000 cash payment (the "Acquisition"). On December 30, 2016, the Issuer completed the Acquisition for $5,925,000 in cash and 202,703 unregistered and restricted Shares and entered into a registration rights agreement which permits TUXS to request the registration of such Shares. Certain officers and/or directors of the Issuer are officers, directors, and/or trustees of the Reporting Persons. The information provided under Items 2 and 3 of this Schedule 13D are incorporated herein by reference.

Exhibit A: Certain Information Required by Instruction C of Schedule 13D. Exhibit B: Agreement to file Schedule 13D jointly.