X0609 4 2026-08-18 0 0001196298 NEPHROS INC NEPH 0001048462 WEXFORD CAPITAL LP false 777 SOUTH FLAGLER DRIVE SUITE 602 EAST WEST PALM BEACH FL 33401-6122 0 0 1 0 0001472112 Wexford GP LLC false C/O WEXFORD CAPITAL LP 777 SOUTH FLAGLER DRIVE, SUITE 602 EAST WEST PALM BEACH CT 33401 0 0 1 0 0001001391 DAVIDSON CHARLES E false C/O WEXFORD CAPITAL LP 777 SOUTH FLAGLER DRIVE, SUITE 602 WEST PALM BEACH FL 33401 0 0 1 0 0001048485 JACOBS JOSEPH false C/O WEXFORD CAPITAL LP 777 SOUTH FLAGLER DRIVE, SUITE 602 EAST WEST PALM BEACH FL 33401 0 0 1 0 0 Common Stock 2026-08-18 4 M 0 812 3.6 A 56872 D Stock Option (Right to Buy) 3.6 2026-08-18 4 M 0 3765 0 D 2026-08-24 Common Stock 3765 36198 D 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. 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. 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. 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. 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. Wexford Capital LP, By: Wexford GP LLC, its general partner, By: Mark E. Ahern, Vice President and Assistant Secretary 2026-08-20 Wexford GP LLC, By: Mark E. Ahern, Vice President and Assistant Secretary 2026-08-20 Charles E. Davidson 2026-08-20 Joseph M. Jacobs 2026-08-20