Exhibit A

JOINT FILING AGREEMENT

The undersigned agree that this Schedule 13G dated September 9, 2025 relating to the Common Stock, $0.00001 par value, of enVVeno Medical Corporation shall be filed on behalf of the undersigned.

KINGDON CAPITAL MANAGEMENT, L.L.C.

By: /s/ Richard Weinstein

Name: Richard Weinstein

Title:   Chief Operating Officer & General Counsel

M. KINGDON OFFSHORE MASTER FUND L.P.

By: Kingdon GP, LLC, its general partner

By: /s/ Mark Kingdon

Name: Mark Kingdon

Title:   Managing Member

KINGDON GP, LLC

By: /s/ Mark Kingdon

Name: Mark Kingdon

Title:   Managing Member

MARK KINGDON

By: /s/ Mark Kingdon