WEXFORD CAPITAL LP - 14 Sep 2026 Form 4 Insider Report for NEPHROS INC (NEPH)

Reporting relationship: 10%+ Owner
Issuer ticker: NEPH
Reported as of: 14 Sep 2026
Net transaction value: $0
SEC form: 4
Accepted by SEC: 16 Sep 2026, 17:05:43 UTC
Prior SEC filing: 20 Aug 2026
Source filing: View source filing
Reporting owner signature: Wexford Capital LP, By: Wexford GP LLC, its general partner, By: Mark E. Ahern, Vice President and Assistant Secretary

Key filing fact

WEXFORD CAPITAL LP filed Form 4 for NEPHROS INC (NEPH) on 16 Sep 2026.

Key facts

This page summarizes WEXFORD CAPITAL LP's Form 4 filing for NEPHROS INC (NEPH).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 16 Sep 2026, 17:05.

Change

Previous filing in this sequence was filed on 20 Aug 2026.
Current net transaction value: $0.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (4)

CIK 0001048462 Primary reporting owner

WEXFORD CAPITAL LP

Relationship: 10%+ Owner
Address: 777 SOUTH FLAGLER DRIVE, SUITE 602 EAST, WEST PALM BEACH
Signature: Wexford Capital LP, By: Wexford GP LLC, its general partner, By: Mark E. Ahern, Vice President and Assistant Secretary
Signature date: 16 Sep 2026

CIK 0001472112

Wexford GP LLC

Relationship: 10%+ Owner
Address: C/O WEXFORD CAPITAL LP, 777 SOUTH FLAGLER DRIVE, SUITE 602 EAST, WEST PALM BEACH
Signature: Wexford GP LLC, By: Mark E. Ahern, Vice President and Assistant Secretary
Signature date: 16 Sep 2026

CIK 0001001391

DAVIDSON CHARLES E

Relationship: 10%+ Owner
Address: C/O WEXFORD CAPITAL LP, 777 SOUTH FLAGLER DRIVE, SUITE 602, WEST PALM BEACH
Signature: Charles E. Davidson
Signature date: 16 Sep 2026

CIK 0001048485

JACOBS JOSEPH

Relationship: 10%+ Owner
Address: C/O WEXFORD CAPITAL LP, 777 SOUTH FLAGLER DRIVE, SUITE 602 EAST, WEST PALM BEACH
Signature: Joseph M. Jacobs
Signature date: 16 Sep 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

NEPH transaction

Common Stock

Other

Transaction value
Shares: -3,355,111
Change %: -95%
Price: $0.000000^*
Shares after: 189,377
Date: 14 Sep 2026
Ownership: See footnotes
Footnotes: F1, F2, F5, F6

NEPH transaction

Common Stock

Other

Transaction value
Shares: -3,355,111
Change %: -95%
Price: $0.000000^*
Shares after: 189,377
Date: 14 Sep 2026
Ownership: See footnotes
Footnotes: F1, F2, F5, F6

NEPH transaction

Common Stock

Other

Transaction value
Shares: -3,355,111
Change %: -95%
Price: $0.000000^*
Shares after: 189,377
Date: 14 Sep 2026
Ownership: See footnotes
Footnotes: F1, F2, F5, F6

NEPH transaction

Common Stock

Other

Transaction value
Shares: -3,355,111
Change %: -95%
Price: $0.000000^*
Shares after: 189,377
Date: 14 Sep 2026
Ownership: See footnotes
Footnotes: F1, F2, F5, F6

NEPH transaction

Common Stock

Other

Transaction value
Shares: -22,710
Change %: -12%
Price: $3.95^*
Shares after: 166,667
Date: 14 Sep 2026
Ownership: See footnotes
Footnotes: F3, F4, F5, F6

NEPH transaction

Common Stock

Other

Transaction value
Shares: -22,710
Change %: -12%
Price: $3.95^*
Shares after: 166,667
Date: 14 Sep 2026
Ownership: See footnotes
Footnotes: F3, F4, F5, F6

NEPH transaction

Common Stock

Other

Transaction value
Shares: -22,710
Change %: -12%
Price: $3.95^*
Shares after: 166,667
Date: 14 Sep 2026
Ownership: See footnotes
Footnotes: F3, F4, F5, F6

NEPH transaction

Common Stock

Other

Transaction value
Shares: -22,710
Change %: -12%
Price: $3.95^*
Shares after: 166,667
Date: 14 Sep 2026
Ownership: See footnotes
Footnotes: F3, F4, F5, F6

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Explanation of responses 6 footnotes

Footnote F1

Represents an in-kind distribution of certain shares of common stock from Wexford Partners 11, L.P. ("WP11"), Wexford 11 Advisors LLC ("WP Advisors") and WPIC 2 LLC ("WPIC2", and together with WP11 and WP Advisors, the "Distributing Entities") that does not involve (i) a purchase or a sale of securities or (ii) any additional consideration.

Footnote F2

Represents the common stock of the Issuer held by the Distributing Entities and Wexford Spectrum Trading Limited ("WST").

Footnote F3

Represents a sale of certain shares of common stock from the Distributing Entities to an entity controlled by Arthur Amron, a current director of the Issuer and a former employee of Wexford Capital LP ("Wexford Capital"), the proceeds of which were distributed to certain underlying investors of the Distributing Entities. No Distributing Entities shall receive any compensation, directly or indirectly, in connection with the transaction described herein.

Footnote F4

Represents the common stock of the Issuer held by WST.

Footnote F5

Wexford Capital may, by reason of its status as (i) sub-advisor of WST, (ii) investment manager of WP11 and (iii) manager of WPIC2, (WPIC2, together with WST and WP11, the "Wexford Entities"), be deemed to own beneficially the shares of Common Stock held by the Wexford Entities. Wexford GP may, by reason of its status as General Partner of Wexford Capital, be deemed to own beneficially the shares of Common Stock held by the Wexford Entities. Each of Messrs. Davidson and Jacobs may, by reason of his status as a controlling person of Wexford GP and WP Advisors, be deemed to own beneficially the shares of Common Stock held by the Wexford Entities and WP Advisors.

Footnote F6

Each of Wexford Capital, Wexford GP, Davidson and Jacobs shares the power to vote and to dispose of the shares of Common Stock held by the Wexford Entities. Each of Davidson and Jacobs shares the power to vote and to dispose of the shares of Common Stock held by WP Advisors. Each of Wexford Capital, Wexford GP and Messrs. Davidson and Jacobs disclaims beneficial ownership of the shares of Common Stock held by the Wexford Entities and/or WP Advisors, as applicable, and this report shall not be deemed as an admission that they are the beneficial owner of such securities except, in the case of Davidson and Jacobs, to the extent of their respective pecuniary interests therein.