MARTHA E. MANNING - 18 Jan 2024 Form 4 Insider Report for MARINUS PHARMACEUTICALS, INC.

Role: SVP, GEN. COUNSEL & CORP. SEC.
Signature: /s/ Debra A. Mohollen, Attorney-in-Fact
Issuer symbol: N/A
Transactions as of: 18 Jan 2024
Net transactions value: $0
Form type: 4
Filing time: 19 Jan 2024, 16:21:02 UTC
Previous filing: 08 Aug 2023
Next filing: 22 Feb 2024
SEC: View on sec.gov

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	MRNS	Common Stock	Award	$0	+21,835	+66%	$0.000000	54,860	18 Jan 2024	Direct	F1

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	MRNS	Stock Option (Right to Buy)	Award	$0	+98,250		$0.000000	98,250	18 Jan 2024	Common Stock	98,250	$9.74	Direct	F2

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents the grant of restricted stock units (RSUs). The RSUs vest in three equal installments, with the first installment vesting on February 15, 2025, the second installment vesting on February 15, 2026, and the third installment vesting on February 15, 2027, subject to the reporting person's continued service with Marinus Pharmaceuticals, Inc. (the Issuer). Each RSU represents the right to receive one share of common stock of the Issuer.
F2	The option vests and becomes exercisable in 36 equal monthly installments beginning on February 18, 2024, subject to the reporting person's continued service with the Issuer.

Content

Represents the grant of restricted stock units (RSUs). The RSUs vest in three equal installments, with the first installment vesting on February 15, 2025, the second installment vesting on February 15, 2026, and the third installment vesting on February 15, 2027, subject to the reporting person's continued service with Marinus Pharmaceuticals, Inc. (the Issuer). Each RSU represents the right to receive one share of common stock of the Issuer.

The option vests and becomes exercisable in 36 equal monthly installments beginning on February 18, 2024, subject to the reporting person's continued service with the Issuer.