Key facts
- This page summarizes WEXFORD CAPITAL LP's Form 4 filing for NEPHROS INC (NEPH).
- 2 reported transactions and 4 derivative rows are listed below.
- Accepted by SEC: 20 Aug 2026, 16:14.
WEXFORD CAPITAL LP - 18 Aug 2026 Form 4 Insider Report for NEPHROS INC (NEPH)
- Reporting relationship
- 10%+ Owner
- Issuer ticker
- NEPH
- Reported as of
- 18 Aug 2026
- Net transaction value
- $0
- SEC form
- 4
- Accepted by SEC
- 20 Aug 2026, 16:14:37 UTC
- Prior SEC filing
- 22 Jun 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
Source evidence
Original filing metadata and source links for verification.
4 source fields
Reporting owner
1 detail
Key filing fact
WEXFORD CAPITAL LP filed Form 4 for NEPHROS INC (NEPH) on 20 Aug 2026.
Change
- Previous filing in this sequence was filed on 22 Jun 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
View source filing
Ownership activity is grounded in SEC Form 4 disclosures.
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
- 20 Aug 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
- 20 Aug 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
- 20 Aug 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
- 20 Aug 2026
Reported non-derivative transactions
Shares, units, or other non-derivative securities reported in this filing.
NEPH
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +812
- Change %
- +1.4%
- Price
- $3.60*
- Shares after
- 56,872
- Date
- 18 Aug 2026
- Ownership
- Direct
- Footnotes
- F1, F2
NEPH
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +812
- Change %
- +1.4%
- Price
- $3.60*
- Shares after
- 56,872
- Date
- 18 Aug 2026
- Ownership
- Direct
- Footnotes
- F1, F2
NEPH
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +812
- Change %
- +1.4%
- Price
- $3.60*
- Shares after
- 56,872
- Date
- 18 Aug 2026
- Ownership
- Direct
- Footnotes
- F1, F2
NEPH
transaction
Common Stock
Options Exercise
- Transaction value
- Shares
- +812
- Change %
- +1.4%
- Price
- $3.60*
- Shares after
- 56,872
- Date
- 18 Aug 2026
- Ownership
- Direct
- Footnotes
- F1, F2
Reported derivative securities
Options, warrants, convertible securities, or similar derivative positions disclosed in the filing.
NEPH
transaction
Derivative
Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -3,765
- Change %
- -9.4%
- Price
- $0.000000*
- Shares after
- 36,198
- Date
- 18 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 3,765
- Exercise price
- $3.60
- Footnotes
- F3, F4
NEPH
transaction
Derivative
Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -3,765
- Change %
- -9.4%
- Price
- $0.000000*
- Shares after
- 36,198
- Date
- 18 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 3,765
- Exercise price
- $3.60
- Footnotes
- F3, F4
NEPH
transaction
Derivative
Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -3,765
- Change %
- -9.4%
- Price
- $0.000000*
- Shares after
- 36,198
- Date
- 18 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 3,765
- Exercise price
- $3.60
- Footnotes
- F3, F4
NEPH
transaction
Derivative
Stock Option (Right to Buy)
Options Exercise
- Transaction value
- Shares
- -3,765
- Change %
- -9.4%
- Price
- $0.000000*
- Shares after
- 36,198
- Date
- 18 Aug 2026
- Ownership
- Direct
- Underlying class
- Common Stock
- Underlying amount
- 3,765
- Exercise price
- $3.60
- Footnotes
- F3, F4
* marks a reported price that did not pass the local price check.
Additional SEC filing notes
Filing notes and footnotes
Explanation of responses 4 footnotes
Footnote F1
Represents the net number of shares of common stock issued upon the cashless exercise of stock options to purchase 3,765 shares, after a portion of the option shares was withheld to satisfy the exercise price.
Footnote F2
Includes shares of common stock granted to Wexford Capital LP ("Wexford Capital") as reported in Form 4s previously filed by Arthur Amron, a current director of the Issuer and a former employee of Wexford Capital.
Footnote F3
One-third of the options vested immediately upon the grant date of August 24, 2016. The remainder of the options vested in equal annual installments on each of the first and second anniversaries of the grant date.
Footnote F4
Includes stock options granted to Wexford Capital as reported in Form 4s previously filed by Arthur Amron, a current director of the Issuer and a former employee of Wexford Capital.
SEC remarks
Wexford GP LLC ("Wexford GP") may, as the General Partner of Wexford Capital, be deemed to own beneficially the securities held by Wexford Capital. Each of Charles E. Davidson ("Davidson") and Joseph M. Jacobs ("Jacobs", and together with Wexford Capital, Wexford GP and Davidson, the "Reporting Persons") may, by reason of his status as a controlling person of Wexford GP, be deemed to own beneficially the securities held by Wexford Capital. Each of Wexford Capital, Wexford GP, Davidson and Jacobs share the power to vote and to dispose of the securities beneficially owned by Wexford Capital. Each of Wexford GP, Davidson and Jacobs disclaim beneficial ownership of the securities owned by Wexford Capital, as applicable, and this report shall not be deemed as an admission that they are the beneficial owners of such securities, except to the extent of any pecuniary interests therein.