Marinus Pharmaceuticals, Inc.

Form 5500

MARINUS PHARMACEUTICALS, INC.

100 Matsonford Road Suite 500, Radnor, Pa 19087 (610) 425-7167 EIN:20-0198082 Plan Admin:Sonya W Weigle

Year	Plan Name	Participants BOY/EOY	Assets BOY/EOY
2023	Plan NameMARINUS PHARMACEUTICALS, INC. HEALTH AND WELFARE PLAN Plan #501 Participants BOY/EOY160 / 0 Assets BOY/EOY$0 / $0	2023	MARINUS PHARMACEUTICALS, INC. HEALTH AND WELFARE PLAN - Plan #501	160 / 0	$0 / $0
2022	Plan NameMARINUS PHARMACEUTICALS, INC. 401(K) PLAN Plan #001 Participants BOY/EOY132 / 182 Assets BOY/EOY$5,785,319 / $7,360,300	2022	MARINUS PHARMACEUTICALS, INC. 401(K) PLAN - Plan #001	132 / 182	$5,785,319 / $7,360,300
2022	Plan NameMARINUS PHARMACEUTICALS, INC. HEALTH AND WELFARE PLAN Plan #501 Participants BOY/EOY114 / 0 Assets BOY/EOY$0 / $0	2022	MARINUS PHARMACEUTICALS, INC. HEALTH AND WELFARE PLAN - Plan #501	114 / 0	$0 / $0
2021	Plan NameMARINUS PHARMACEUTICALS, INC. 401(K) PLAN Plan #001 Participants BOY/EOY74 / 128 Assets BOY/EOY$3,061,229 / $5,785,319	2021	MARINUS PHARMACEUTICALS, INC. 401(K) PLAN - Plan #001	74 / 128	$3,061,229 / $5,785,319
2020	Plan NameMARINUS PHARMACEUTICALS, INC. 401(K) PLAN Plan #001 Participants BOY/EOY44 / 70 Assets BOY/EOY$2,453,314 / $3,061,229	2020	MARINUS PHARMACEUTICALS, INC. 401(K) PLAN - Plan #001	44 / 70	$2,453,314 / $3,061,229
2019	Plan NameMARINUS PHARMACEUTICALS, INC. 401K PLAN Plan #001 Participants BOY/EOY27 / 47 Assets BOY/EOY$1,672,172 / $2,453,314	2019	MARINUS PHARMACEUTICALS, INC. 401K PLAN - Plan #001	27 / 47	$1,672,172 / $2,453,314