SCHEDULE 13G/A

MARINUS PHARMACEUTICALS INC

Common Stock, par value $0.001 per share · CUSIP: 56854Q200

Event date: 2024-12-31

Reporting persons may disclose overlapping interests. Their amounts are shown individually and are not added into a filing total.

Filing-level shares

Unavailable

Percent of class

Unavailable

• Franklin Resources, Inc.

  Shares: 0.00 · Class: 0.0%

• Charles B. Johnson

  Shares: 0.00 · Class: 0%

• Rupert H. Johnson, Jr.

  Shares: 0.00 · Class: 0%

Amounts are as disclosed in this filing. Schedule type alone does not establish investment intent.