![Mark Winmill](data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" width="16" height="16" fill="%231b1b1b" class="bi bi-person-fill" viewBox="0 0 16 16"><path d="M3 14s-1 0-1-1 1-4 6-4 6 3 6 4-1 1-1 1zm5-6a3 3 0 1 0 0-6 3 3 0 0 0 0 6"/></svg>)
Mark Winmill
Chief Executive Officer at
GLOBAL SELF STORAGE, INC.
Net worth: 2 M $ as of 2026-06-29
Profile
Mark Campbell Winmill was the founder of Bull & Bear Securities, Inc., founded in 1987, where the title held was Chief Executive Officer from 1987 to 1999.
Current jobs include Chairman, President & Chief Executive Officer at Tuxis Corp.
since 2015; Chairman, President & Chief Executive Officer at Global Self Storage, Inc. since 2012; Director & Executive Vice President at Winmill & Co., Inc. since 2015; Director at New York Self Storage Association, Inc.; EVP & Chief Investment Strategist at Midas Management Corp.
since 1989; Principal at Bexil Securities LLC; Vice President at Midas Series Trust; Principal at Midas Securities Group, Inc.; Vice President at Foxby Corp.
Fund since 2012; and Vice President at Bexil Investment Trust since 2011.
Former jobs include Vice President at Bexil Corp.
and Chief Investment Strategist at Bexil Advisers LLC.
Education includes an undergraduate degree from Bowdoin College conferred in 2014.
Known holdings in public companies
| Company | Date | Number of shares | Valuation | Valuation date |
|---|---|---|---|---|
| 2026-05-13 | 368,582 ( 3.23% ) | 2 M $ | 2026-06-29 |
Mark Winmill active positions
| Companies | Position | Start |
|---|---|---|
| WINMILL & CO. INCORPORATED | Director/Board Member | 1999-12-31 |
| TUXIS CORPORATION | Chief Executive Officer | 1999-12-31 |
| GLOBAL SELF STORAGE, INC. | Chief Executive Officer | 2011-12-31 |
| BEXIL INVESTMENT TRUST | Corporate Officer/Principal | 2011-01-31 |
| FOXBY CORP. | Corporate Officer/Principal | 2011-12-31 |
Midas Management Corp.
 Midas Management Corp. Investment ManagersFinance Midas Management seeks to invest in what they believe to be quality companies with unique combinations of strength in operations, products, and finances with either growth or value characteristics. A security is typically sold when its potential to meet the Fund’s investment objective is limited or exceeded by another potential investment, when an investment in an issuer no longer appears to meet the Fund’s investment objective, or when the Fund must raise cash to meet shareholder redemptions. | Market Strategist | 1988-12-31 |
New York Self Storage Association
 New York Self Storage Association Miscellaneous Commercial ServicesCommercial Services Operates as a not-for-profit corporation that represents the self-storage industries | Director/Board Member | - |
Midas Securities Group, Inc.
 Midas Securities Group, Inc. Investment Banks/BrokersFinance Provides securities brokerage services | Corporate Officer/Principal | - |
Bexil Securities LLC
 Bexil Securities LLC Investment Banks/BrokersFinance Provides security brokerage services | Corporate Officer/Principal | - |
| ░░░░░ ░░░░░░ ░░░░░ | ░░░░░░░░░ ░░░░░░░░░░░░░░░░░ | - |
Former positions of Mark Winmill
| Companies | Position | End |
|---|---|---|
| ░░░░░ ░░░░░░░░ ░░░ | ░░░░░ ░░░░░░░░░░ ░░░░░░░ | ░░░░░░░░░░ |
| ░░░░ ░░░░░ ░░░░ ░░░░░░░░░░░ ░░░░ | ░░░░░ ░░░░░░░░░ ░░░░░░░ | ░░░░░░░░░░ |
| ░░░░░ ░░░░░░░░░░░ | ░░░░░░░░░ ░░░░░░░░░░░░░░░░░ | - |
Training of Mark Winmill
Experiences
Positions held
Active
Inactive
Listed companies
Private companies
Connections
63
1st degree connections
14
1st degree companies
Male
Female
Members of the board
Executives
Linked companies
| Private companies | 14 |
|---|---|
Tuxis Corp.
 Tuxis Corp. Investment Trusts/Mutual FundsMiscellaneous Acts as Closed-End Investment Fund/Investment Trust | Miscellaneous |
Global Self Storage, Inc.
 Global Self Storage, Inc. Real Estate Investment TrustsFinance Functions as a real estate investment trust that owns, operates, manages, acquires and redevelops self storage properties | Finance |
Winmill & Co., Inc.
 Winmill & Co., Inc. Investment ManagersFinance Provides investment services | Finance |
Bexil Corp.
 Bexil Corp. Investment ManagersFinance Operates as a holding company with interest in investment advisory and securities trading businesses | Finance |
Midas Management Corp.
Midas Management Corp. Investment ManagersFinance Midas Management seeks to invest in what they believe to be quality companies with unique combinations of strength in operations, products, and finances with either growth or value characteristics. A security is typically sold when its potential to meet the Fund’s investment objective is limited or exceeded by another potential investment, when an investment in an issuer no longer appears to meet the Fund’s investment objective, or when the Fund must raise cash to meet shareholder redemptions. | Finance |
Bexil Advisers LLC
 Bexil Advisers LLC Investment ManagersFinance Bexil Advisers’ Fund primarily seeks a high current income and capital appreciation is a secondary objective. The Fund’s strategy is to seek companies with strong operations showing superior returns on equity and assets with reasonable valuations. Generally, the Fund purchases and holds income generating equity securities of profitable, growing, and conservatively valued companies across a broad array of industries. | Finance |
Foxby Corp. Fund
 Foxby Corp. Fund Investment Trusts/Mutual FundsMiscellaneous Acts as Closed-End Investment Fund/Investment Trust | Miscellaneous |
Bexil Investment Trust
 Bexil Investment Trust Investment Trusts/Mutual FundsMiscellaneous Acts as Closed-End Investment Fund/Investment Trust | Miscellaneous |
Bull & Bear Securities, Inc.
 Bull & Bear Securities, Inc. Investment Banks/BrokersFinance Provides discount security brokerage services | Finance |
Bowdoin College
 Bowdoin College Other Consumer ServicesConsumer Services Functions as a College/University | Consumer Services |
Bexil Securities LLC
Bexil Securities LLC Investment Banks/BrokersFinance Provides security brokerage services | Finance |
Midas Series Trust
 Midas Series Trust Investment Trusts/Mutual FundsMiscellaneous Acts as Open-End Investment Fund/Unit Trust | Miscellaneous |
Midas Securities Group, Inc.
Midas Securities Group, Inc. Investment Banks/BrokersFinance Provides securities brokerage services | Finance |
New York Self Storage Association
New York Self Storage Association Miscellaneous Commercial ServicesCommercial Services Operates as a not-for-profit corporation that represents the self-storage industries | Commercial Services |
- Stock Market
- Insiders
- Mark Winmill
Choose MarketScreener 
