Jeffrey Eberwein details 29.5% Star Equity (HSON) ownership stake

Rhea-AI Filing Summary

Star Equity Holdings, Inc. investor Jeffrey E. Eberwein reports beneficial ownership of 1,104,701 shares of common stock, or about 29.5% of the class. This includes 49,450 shares underlying immediately exercisable warrants. The stake reflects an aggregate purchase price of approximately $22,058,114, excluding commissions.

The percentage is based on 3,748,345 shares, consisting of 3,698,895 common shares outstanding as of June 1, 2026 plus 49,450 warrants attributed to him. In addition, he owns 765,077 shares of the company’s 10% Series A Cumulative Perpetual Preferred Stock.

Insights

Equity ownership and governance analyst

Eberwein discloses a near 30% stake in Star Equity, signaling significant influence.

Jeffrey E. Eberwein reports beneficial ownership of 1,104,701 Star Equity common shares, or 29.47% of the class, based on 3,748,345 shares including 49,450 warrants attributed to him. This places him as a highly influential shareholder with sole voting and dispositive power over the reported shares.

The filing states an aggregate purchase price of about $22,058,114 for these shares, excluding commissions, indicating substantial capital committed. He also holds 765,077 shares of 10% Series A Cumulative Perpetual Preferred Stock, adding another layer to his economic interest in the company.

Because this is Amendment No. 11 to his Schedule 13D, it reflects an ongoing, actively reported position. Future amendments or company disclosures referencing this 29.47% beneficial stake will help clarify how his influence may relate to voting outcomes and strategic decisions.

Key Figures

Beneficially owned common shares: 1,104,701 shares Ownership percentage: 29.47% Aggregate purchase price: $22,058,114 +4 more

7 metrics

Beneficially owned common shares 1,104,701 shares Star Equity common stock beneficially owned by Eberwein

Ownership percentage 29.47% Percent of Star Equity common stock class represented

Aggregate purchase price $22,058,114 Cost of 1,104,701 common shares, excluding commissions

Common shares outstanding 3,698,895 shares Common shares outstanding as of June 1, 2026

Total shares for percentage base 3,748,345 shares Outstanding shares plus 49,450 warrants attributed

Immediately exercisable warrants 49,450 shares Common shares underlying Eberwein’s warrants

Preferred shares held 765,077 shares 10% Series A Cumulative Perpetual Preferred Stock

Key Terms

beneficially owned, Schedule 13D, Cumulative Perpetual Preferred Stock, warrants, +1 more

5 terms

beneficially owned financial

"As of the close of business on June 1, 2026, Mr. Eberwein beneficially owned 1,104,701 Shares."

Beneficially owned describes securities or assets where a person has the economic rights and control—such as the right to receive dividends and to direct voting—even if legal title is held in another name. Think of it like having the keys and using a car that’s registered to someone else: you get the benefits and make decisions. Investors care because beneficial ownership reveals who truly controls value and voting power, affecting corporate decisions and takeover dynamics.

Schedule 13D regulatory

"The following constitutes Amendment No. 11 to the filed by the undersigned ("Amendment No. 11")."

A Schedule 13D is a legal document that investors file with regulators when they buy a large enough stake in a company to potentially influence its management or decisions. It provides details about the investor’s intention, ownership stake, and plans, helping other investors understand who is gaining control and what their motives might be.

Cumulative Perpetual Preferred Stock financial

"Mr. Eberwein owns 765,077 shares of the Issuer's 10% Series A Cumulative Perpetual Preferred Stock."

A cumulative perpetual preferred stock is a share that acts like a long-lasting hybrid between a bond and a dividend-paying stock: it promises regular fixed payments that, if missed, accumulate and must be paid later before common shareholders get dividends, and it has no set maturity date. Investors care because it can provide steady, higher-priority income similar to interest, but with limited capital upside, sensitivity to interest rates, and the risk that payments can be delayed even though they continue to accrue.

warrants financial

"Includes 49,450 shares of common stock underlying immediately exercisable warrants ("Warrants") to purchase Star common stock."

Warrants are special documents that give you the right to buy a company's stock at a set price before a certain date. They are often used as a way for companies to attract investors or raise money, and their value can increase if the company's stock price goes up.

dispositive power financial

"Sole Dispositive Power 1,104,701.00"

Dispositive power is the authority to decide the final outcome of an asset, legal claim, contract, or corporate action — in effect the power to dispose of or resolve something. For investors it matters because whoever holds that authority can determine who gets paid, who controls an asset or vote, and how risks and returns are allocated; think of it like holding the key that lets you lock in the winner or loser in a deal.

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SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13D

Under the Securities Exchange Act of 1934

(Amendment No. 11)

Star Equity Holdings, Inc.

(Name of Issuer)

Common Stock, par value $0.001 per share

(Title of Class of Securities)

443787205

(CUSIP Number)

JEFFREY E. EBERWEIN
53 Forest Avenue, Suite 101,
Old Greenwich, CT, 06870
203-489-9500

(Name, Address and Telephone Number of Person Authorized to Receive Notices and Communications)

05/28/2026

(Date of Event Which Requires Filing of This Statement)

If the filing person has previously filed a statement on Schedule 13G to report the acquisition that is the subject of this Schedule 13D, and is filing this schedule because of §§ 240.13d-1(e), 240.13d-1(f) or 240.13d-1(g), check the following box.

The information required on the remainder of this cover page shall not be deemed to be "filed" for the purpose of Section 18 of the Securities Exchange Act of 1934 ("Act") or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

schemaVersion:

SCHEDULE 13D

CUSIP Number(s): 443787205

1

Name of reporting person

JEFFREY E. EBERWEIN

2

Check the appropriate box if a member of a Group (See Instructions)

(a)
(b)

3

SEC use only

4

Source of funds (See Instructions)

PF, OO

5

Check if disclosure of legal proceedings is required pursuant to Items 2(d) or 2(e)

6

Citizenship or place of organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

7	Sole Voting Power 1,104,701.00
8	Shared Voting Power
9	Sole Dispositive Power 1,104,701.00
10	Shared Dispositive Power

11

Aggregate amount beneficially owned by each reporting person

1,104,701.00

12

Check if the aggregate amount in Row (11) excludes certain shares (See Instructions)

13

Percent of class represented by amount in Row (11)

29.5 %

14

Type of Reporting Person (See Instructions)

IN

Comment for Type of Reporting Person:

* Includes 49,450 shares of common stock underlying immediately exercisable warrants ("Warrants") to purchase Star common stock. Excludes certain grants made under the Issuer's 2009 Incentive Stock and Awards Plan, as amended and restated, specifically 8,918 shares of restricted stock granted on September 15, 2025, 5,703 shares of restricted stock granted on January 15, 2026, 6,504 shares of restricted stock granted on April 15, 2026, and 6,750 restricted stock units granted on January 24, 2025, which vest upon the anniversary of the respective grant dates.

SCHEDULE 13D

Item 1.	Security and Issuer
(a)	Title of Class of Securities: Common Stock, par value $0.001 per share
(b)	Name of Issuer: Star Equity Holdings, Inc.
(c)	Address of Issuer's Principal Executive Offices: 53 FOREST AVENUE, SUITE 101, OLD GREENWICH, CONNECTICUT , 06870.
Item 1 Comment: The following constitutes Amendment No. 11 to the Schedule 13D filed by the undersigned ("Amendment No. 11"). This Amendment No. 11 amends the Schedule 13D as specifically set forth herein.
Item 3.	Source and Amount of Funds or Other Consideration
	Item 3 is hereby amended and restated as follows: The aggregate purchase price of the 1,104,701 Shares beneficially owned by Mr. Eberwein is approximately $22,058,114, excluding brokerage commissions. In addition to the 1,104,701 Shares, Mr. Eberwein owns 765,077 shares of the Issuer's 10% Series A Cumulative Perpetual Preferred Stock.
Item 5.	Interest in Securities of the Issuer
(a)	Items 5(a)-(c) are hereby amended and restated to read as follows: The aggregate percentage of Shares reported owned by the Reporting Person is based upon 3,748,345 Shares, which is inclusive of 3,698,895 shares outstanding as of June 1, 2026 in addition to 49,450 Warrants attributed to the Reporting Person. The total number of Shares outstanding is based on information provided by the Issuer to the Reporting Person. As of the close of business on June 1, 2026, Mr. Eberwein beneficially owned 1,104,701 Shares. Percentage: 29.47%
(b)	1. Sole power to vote or direct vote: 1,104,701 2. Shared power to vote or direct vote: 0 3. Sole power to dispose or direct the disposition: 1,104,701 4. Shared power to dispose or direct the disposition: 0
(c)	Jeff Eberwein's transactions in the Shares in the last 60 days are set forth in Schedule A, attached hereto as Exhibit 99.1, and are incorporated herein by reference.
Item 7.	Material to be Filed as Exhibits.
	Exhibit 99.1 - Schedule A.

SIGNATURE

After reasonable inquiry and to the best of my knowledge and belief, I certify that the information set forth in this statement is true, complete and correct.

JEFFREY E. EBERWEIN

Signature:	/s/ Jeffrey E. Eberwein
Name/Title:	Jeffrey E. Eberwein
Date:	06/01/2026

FAQ

What stake in Star Equity Holdings does Jeffrey E. Eberwein report in this Schedule 13D/A for HSON?

Jeffrey E. Eberwein reports beneficial ownership of 1,104,701 Star Equity common shares, representing about 29.47% of the class. This figure is based on 3,748,345 shares, including 3,698,895 outstanding shares and 49,450 warrants attributed to him.

How many Star Equity common shares and warrants does Eberwein control according to this HSON Schedule 13D/A?

Eberwein reports sole voting and dispositive power over 1,104,701 Star Equity common shares. This total includes 49,450 shares underlying immediately exercisable warrants, giving him direct control over both currently held shares and warrant-derived shares.

What total purchase price does Eberwein disclose for his Star Equity common stock position in the HSON filing?

He discloses an aggregate purchase price of approximately $22,058,114 for the 1,104,701 Star Equity common shares he beneficially owns. This amount is stated exclusive of brokerage commissions and reflects his total cost basis for the reported common stock position.

How many preferred shares of Star Equity does Eberwein own alongside his HSON common stake?

In addition to his common shares, Eberwein owns 765,077 shares of Star Equity’s 10% Series A Cumulative Perpetual Preferred Stock. This preferred position increases his overall economic exposure to the company beyond his reported common stock holdings.

What share count does Eberwein use to calculate his 29.47% Star Equity ownership in this HSON Schedule 13D/A?

The 29.47% beneficial ownership is calculated using 3,748,345 Star Equity common shares. This figure includes 3,698,895 shares outstanding as of June 1, 2026, plus 49,450 warrants attributed to Eberwein, as provided by the company.

Does Eberwein share voting or dispositive power over his Star Equity holdings in this HSON filing?

No. The filing states he has sole power to vote and dispose of 1,104,701 Star Equity common shares. Shared voting power and shared dispositive power are both listed as zero, indicating exclusive control over the reported position.