Nephros gets 5.68% passive stake from Davidson

Rhea-AI Filing Summary

Nephros, Inc. (NEPH) is reported to have 5%-plus ownership by Charles E. Davidson and CD Holding Company, LLC in a Schedule 13G. The Reporting Persons beneficially own 616,945 shares of common stock, representing 5.68% of the class, based on 10,860,120 shares outstanding as of August 7, 2026.

Davidson, a United States citizen, and CD Holding Company, LLC, a Delaware entity, report sole voting and sole dispositive power over 616,945 shares and no shared voting or dispositive power. Davidson may be deemed to beneficially own the shares held by CD Holding Company, LLC due to his status as a controlling person, and he has the right to receive dividends and sale proceeds from these shares.

Key Figures

Shares beneficially owned: 616,945 shares Percent of class owned: 5.68% Shares outstanding: 10,860,120 shares +2 more

5 metrics

Shares beneficially owned 616,945 shares Nephros common stock reported by the Reporting Persons

Percent of class owned 5.68% Percentage of Nephros common stock beneficially owned by the Reporting Persons

Shares outstanding 10,860,120 shares Nephros common stock outstanding as of August 7, 2026, used for ownership calculation

Sole voting power 616,945 shares Shares over which the Reporting Persons have sole power to vote or direct the vote

Sole dispositive power 616,945 shares Shares over which the Reporting Persons have sole power to dispose or direct disposition

Key Terms

beneficially own, Sole Voting Power, Sole Dispositive Power, Schedule 13G, +2 more

6 terms

beneficially own financial

"Reporting Persons may be deemed to beneficially own the same securities"

Beneficially own means having the economic rights and risks of a security—such as the right to receive dividends, sell the shares, or profit from price changes—whether or not your name appears on the official share register. Think of it like renting a car: you use it and reap the benefits even if the title lists someone else. Investors care because beneficial ownership determines who truly controls value, must be disclosed under securities rules, and can signal potential influence or trading activity that affects a stock’s price.

Sole Voting Power financial

"5 | Sole Voting Power 616,945.00"

Sole voting power is the exclusive right to cast votes attached to a shareholder’s stock without needing approval from anyone else. Like holding the only remote control for a TV, it lets that holder decide corporate matters such as board members, mergers, and policy changes, making it important to investors because it concentrates control and can strongly influence a company’s strategy and the value of its shares.

Sole Dispositive Power financial

"7 | Sole Dispositive Power 616,945.00"

Sole dispositive power is the exclusive legal authority to decide what happens to a security — for example, whether to sell, transfer, or retain shares — without needing anyone else’s permission. Investors care because it signals who truly controls the economic outcome of an investment: like holding the only key to a safe, the holder can realize gains or losses and may trigger regulatory reporting, insider rules, or influence over corporate ownership.

Schedule 13G regulatory

"jointly filing this because such Reporting Persons may be deemed"

A Schedule 13G is a formal document that investors file with the government when they acquire a large ownership stake in a company, usually for investment purposes rather than control. It helps keep the public informed about who owns significant parts of a company's shares, which can influence how the company is managed and how investors make decisions. Filing this schedule is important for transparency and understanding the ownership landscape of publicly traded companies.

CUSIP Number financial

"(e) | CUSIP Number(s): 640671400"

A CUSIP number is a nine-character code that uniquely identifies a specific U.S. or Canadian stock, bond, or other security, similar to a barcode or a social-security number for a financial instrument. It matters to investors because it removes confusion between similar securities, ensures trades and settlements are applied to the correct issue, and helps locate official documents and transaction records quickly.

Joint Filing Agreement regulatory

"a written agreement relating to the joint filing of this (the "Joint Filing Agreement")"

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What percentage of Nephros (NEPH) does Charles E. Davidson report owning?

Charles E. Davidson, together with CD Holding Company, LLC, reports beneficial ownership of 5.68% of Nephros common stock, corresponding to 616,945 shares, based on 10,860,120 shares outstanding as of August 7, 2026.

How many Nephros (NEPH) shares do the reporting persons beneficially own?

The reporting persons, Charles E. Davidson and CD Holding Company, LLC, beneficially own 616,945 shares of Nephros common stock, with sole voting power and sole dispositive power over all of these shares and no shared power reported.

What is the share count base used to calculate the 5.68% Nephros (NEPH) ownership?

The 5.68% ownership is calculated using 10,860,120 shares of Nephros common stock issued and outstanding as of August 7, 2026, as reported by Nephros in a Form 10-Q filed on August 10, 2026.

Who are the reporting persons in this Nephros (NEPH) Schedule 13G?

The reporting persons are Charles E. Davidson and CD Holding Company, LLC. Davidson may be deemed to beneficially own the securities held by CD Holding Company, LLC due to his status as a controlling person of that entity.

What voting and dispositive powers are reported over Nephros (NEPH) shares?

The filing reports sole voting power over 616,945 shares and sole dispositive power over the same 616,945 shares, with no shared voting or dispositive power disclosed for the reporting persons.

Does Charles E. Davidson receive dividends or sale proceeds from Nephros (NEPH) shares?

Yes. The filing states that Davidson has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the 616,945 shares of Nephros common stock reported.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 09/16/2026 - 05:11 PM Accepted by SEC EDGAR 09/16/2026 - 05:11 PM Learn about SEC filing dates

SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

SCHEDULE 13G

UNDER THE SECURITIES EXCHANGE ACT OF 1934

Nephros, Inc.

(Name of Issuer)

Common stock, par value $0.001 per share

(Title of Class of Securities)

640671400

(CUSIP Number)

09/14/2026

(Date of Event Which Requires Filing of this Statement)

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

Rule 13d-1(b)

Rule 13d-1(c)

Rule 13d-1(d)

schemaVersion:

SCHEDULE 13G

CUSIP Number(s): 640671400

1

Names of Reporting Persons

Charles E. Davidson

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

UNITED STATES

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 616,945.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 616,945.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

616,945.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.68 %

12

Type of Reporting Person (See Instructions)

IN

SCHEDULE 13G

CUSIP Number(s): 640671400

1

Names of Reporting Persons

CD Holding Company, LLC

2

Check the appropriate box if a member of a Group (see instructions)

(a)
(b)

3

Sec Use Only

4

Citizenship or Place of Organization

DELAWARE

Number of Shares Beneficially Owned by Each Reporting Person With:

5	Sole Voting Power 616,945.00
6	Shared Voting Power 0.00
7	Sole Dispositive Power 616,945.00
8	Shared Dispositive Power 0.00

9

Aggregate Amount Beneficially Owned by Each Reporting Person

616,945.00

10

Check box if the aggregate amount in row (9) excludes certain shares (See Instructions)

11

Percent of class represented by amount in row (9)

5.68 %

12

Type of Reporting Person (See Instructions)

OO

SCHEDULE 13G

Item 1.
(a)	Name of issuer: Nephros, Inc.
(b)	Address of issuer's principal executive offices: 380 Lackawanna Place South Orange, New Jersey 07079
Item 2.
(a)	Name of person filing: Charles E. Davidson ("Davidson") and CD Holding Company, LLC ("CD Holdings", and together with Davidson, the "Reporting Persons") are hereby jointly filing this Schedule 13G because such Reporting Persons may be deemed to beneficially own the same securities named in Item 1 due to certain affiliations among the Reporting Persons. In accordance with Rule 13d-1(k)(1)(iii) promulgated pursuant to the Securities Exchange Act of 1934, as amended, the Reporting Persons have executed a written agreement relating to the joint filing of this Schedule 13G (the "Joint Filing Agreement"), a copy of which is annexed hereto as Exhibit 99.1.
(b)	Address or principal business office or, if none, residence: The address of the principal business office of the Reporting Persons is c/o Wexford Capital LP, 777 South Flagler Drive, Suite 602 East, West Palm Beach, FL 33401.
(c)	Citizenship: Davidson is United States citizen. CD Holdings is formed in Delaware.
(d)	Title of class of securities: Common stock, par value $0.001 per share
(e)	CUSIP Number(s): 640671400
Item 3.	If this statement is filed pursuant to §§ 240.13d-1(b) or 240.13d-2(b) or (c), check whether the person filing is a:
(a)	Broker or dealer registered under section 15 of the Act (15 U.S.C. 78o);
(b)	Bank as defined in section 3(a)(6) of the Act (15 U.S.C. 78c);
(c)	Insurance company as defined in section 3(a)(19) of the Act (15 U.S.C. 78c);
(d)	Investment company registered under section 8 of the Investment Company Act of 1940 (15 U.S.C. 80a-8);
(e)	An investment adviser in accordance with § 240.13d-1(b)(1)(ii)(E);
(f)	An employee benefit plan or endowment fund in accordance with § 240.13d-1(b)(1)(ii)(F);
(g)	A parent holding company or control person in accordance with § 240.13d-1(b)(1)(ii)(G);
(h)	A savings associations as defined in Section 3(b) of the Federal Deposit Insurance Act (12 U.S.C. 1813);
(i)	A church plan that is excluded from the definition of an investment company under section 3(c)(14) of the Investment Company Act of 1940 (15 U.S.C. 80a-3);
(j)	A non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J). If filing as a non-U.S. institution in accordance with § 240.13d-1(b)(1)(ii)(J), please specify the type of institution:
(k)	Group, in accordance with Rule 240.13d-1(b)(1)(ii)(K).
Item 4.	Ownership
(a)	Amount beneficially owned: The information required by Item 4(a) is set forth in Row 9 of the cover page for each of the Reporting Persons and is incorporated herein by reference. Davidson may, by reason of his status as a controlling person of CD Holdings, be deemed to own beneficially the securities held by CD Holdings.
(b)	Percent of class: The information required by Item 4(b) is set forth in Row 11 of the cover page for each of the Reporting Persons and is incorporated herein by reference. The information in Row 11 is calculated on the basis of 10,860,120 shares of Common Stock issued and outstanding as of August 7, 2026, as reported by the Issuer in the Form 10-Q filed by the Issuer with the Securities and Exchange Commission on August 10, 2026.
(c)	Number of shares as to which the person has:
	(i) Sole power to vote or to direct the vote: The information required by Item 4(c)(i) is set forth in Row 5 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
	(ii) Shared power to vote or to direct the vote: The information required by Item 4(c)(ii) is set forth in Row 6 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
	(iii) Sole power to dispose or to direct the disposition of: The information required by Item 4(c)(iii) is set forth in Row 7 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
	(iv) Shared power to dispose or to direct the disposition of: The information required by Item 4(c)(iv) is set forth in Row 8 of the cover page for each of the Reporting Persons and is incorporated herein by reference.
Item 5.	Ownership of 5 Percent or Less of a Class.
	Not Applicable
Item 6.	Ownership of more than 5 Percent on Behalf of Another Person.
	If any other person is known to have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, such securities, a statement to that effect should be included in response to this item and, if such interest relates to more than 5 percent of the class, such person should be identified. A listing of the shareholders of an investment company registered under the Investment Company Act of 1940 or the beneficiaries of employee benefit plan, pension fund or endowment fund is not required. Davidson has the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the shares of Common Stock reported herein.
Item 7.	Identification and Classification of the Subsidiary Which Acquired the Security Being Reported on by the Parent Holding Company or Control Person.
	Not Applicable
Item 8.	Identification and Classification of Members of the Group.
	Not Applicable
Item 9.	Notice of Dissolution of Group.
	Not Applicable

Item 10.

Certifications:

By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11.

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.

Charles E. Davidson

Signature:	/s/ Charles E. Davidson
Name/Title:	Charles E. Davidson
Date:	09/16/2026

CD Holding Company, LLC

Signature:	/s/ Charles E. Davidson
Name/Title:	Charles E. Davidson, Manager and President
Date:	09/16/2026