401(k) · DOL Form 5500 · 2023

Marinus Pharmaceuticals, Inc. 401(k) Plan

Data updated 2026-08-25

$12M
Total assets Small plan by assets
154
Participants Small participant base
62nd
Percentile by assets National rank
$75,984
Avg per participant Below avg balance/head
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Official DOL plan name: Marinus Pharmaceuticals, Inc. 401(k) Plan · Sponsored by Marinus Pharmaceuticals, Inc. · Pennsylvania · Professional & Technical Services

$12M in assets, 154 participants

Marinus Pharmaceuticals, Inc.'s Marinus Pharmaceuticals, Inc. 401(k) Plan reported $12M in total assets and 154 participants in its 2023 DOL Form 5500 filing, ranking in the 62nd percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #12,390 in Professional & Technical Services (20,321 peers)

Coverage in Pennsylvania

Marinus Pharmaceuticals, Inc. 401(k) Plan covers 154 participants in Pennsylvania, about 19% of the average Pennsylvania filer (state average ~822 per filing). Assets: $12M.

#12,390
in Professional & Technical Services (20,321 peers)
+59.0%
assets growth YoY

Marinus Pharmaceuticals, Inc. 401(k) Plan's mid-pack asset rank among Professional & Technical Services and all filers

Marinus Pharmaceuticals, Inc. 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$11,701,584 Top 38% higher than 62% of 127,068 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023

Marinus Pharmaceuticals, Inc. 401(k) Plan among mid-size filed plans by headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Marinus Pharmaceuticals, Inc. 401(k) Plan sits mid-pack in the medium band (154 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Marinus Pharmaceuticals, Inc. 401(k) Plan reported net income rose from $2M in the plan year 2022 filing to $4M in the plan year 2023 filing.
  • Marinus Pharmaceuticals, Inc. 401(k) Plan end-of-year assets rose from $7M in the plan year 2022 filing to $12M in the plan year 2023 filing.
  • Marinus Pharmaceuticals, Inc. 401(k) Plan reported participants rose from 116 in the plan year 2022 filing to 154 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Plan-year Form 5500 strip

Filing strip 200198082 · Marinus Pharmaceuticals, Inc. PY 2023 · 401(k)

Marinus Pharmaceuticals, Inc. 401(k) Plan · $12M · 154 · 62nd

  • BOY $12M
  • SCH 154
  • EBSA 62nd
  • PART 401(k)
  • TYPE near The Gasparilla Inn, Inc. 401(k) Plan
  • NET ind #12390

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Professional & Technical Services retirement plans → · Plans in Pennsylvania →

Marinus Pharmaceuticals, Inc. 401(k) Plan in the asset neighbourhood

Marinus Pharmaceuticals, Inc. 401(k) PlanMarinus Pharmaceuticals, Inc…$12MThe Gasparilla Inn, Inc. 401(k) PlanThe Gasparilla Inn, Inc. 401…$12MTakumi Stamping 401(k) Plan$12MAlabama Agc 401(k) Multiple Employer PlanAlabama Agc 401(k) Multiple …$12MDavis & Towle Group, Inc. 401(k) Plan & TrustDavis & Towle Group, Inc. 40…$12M
End-of-year total assets ($M) among Marinus Pharmaceuticals, Inc. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Pennsylvania filing particulars

Total Assets (Beginning of Year)$7M
Net Assets (End of Year)$12M
Net Income$4M
Employer EIN200198082
Plan Effective Date2007-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Marinus Pharmaceuticals, Inc.)

Sponsor-wide plan assets over time

All Marinus Pharmaceuticals, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$15M 99.34529842533593% vs 2022
2024 filing year
$5M$10M$15M$20M 202220232024 $7.36M $14.7M ▲ +99.3%
Year Plans Participants Total Assets
2022 1 116 $7M
2023 1 154 $12M
2024 1 166 $15M

Nearby 401(k) Plans in Pennsylvania

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Marinus Pharmaceuticals, Inc. 401(k) Plan vs. nearby 401(k) plans in Pennsylvania, assets vs. participants Scatter plot of 6 data points. -50000050000100000 -505101520 Total assets ($B) Participants Marinus Pharmaceuticals, Inc. 401(k) Plan, Total assets ($B): 0.011701584 · Participants: 154Marinus Pharmaceuticals, Inc. 401(k) PlanComcast Corporation Retirement - Investment Plan, Total assets ($B): 17.368669862 · Participants: 93136Comcast Corporation Retirement - Investment PlanCigna 401(k) Plan, Total assets ($B): 13.003870935 · Participants: 66760Cigna 401(k) PlanThe Vanguard Retirement and Savings Plan, Total assets ($B): 9.765617477 · Participants: 18200The Vanguard Retirement and Savings PlanThe PNC Financial Services Group, Inc. Incentive Savings Plan, Total assets ($B): 9.339762 · Participants: 61697The PNC Financial Services Group, Inc. Incentive Savings PlanThe Bank of New York Mellon Corporation 401(k) Savings Plan, Total assets ($B): 8.955655142 · Participants: 25184The Bank of New York Mellon Corporation 401(k) Savings Plan
Marinus Pharmaceuticals, Inc. 401(k) Plan vs. nearby 401(k) plans in Pennsylvania, assets vs. participants
Compare Marinus Pharmaceuticals, Inc. 401(k) Plan side-by-side with 3 peers →

Marinus Pharmaceuticals, Inc. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Pennsylvania, the nearest 401(k) by assets is The Gasparilla Inn, Inc. 401(k) Plan in FL ($12M); by covered participants it is Eaze Solutions Inc. Retirement Trust in CA (154 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($12M here).

Similar participant headcount

Nearest other-state filings by covered participants (154 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Marinus Pharmaceuticals, Inc. 401(k) Plan assets move in 2023? ▼
Marinus Pharmaceuticals, Inc. 401(k) Plan surged - up 59.0% during 2023, from $7M to $12M. Reported net income was $4M.
How have Marinus Pharmaceuticals, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Marinus Pharmaceuticals, Inc.'s sponsor-wide assets grew 99.3%, from $7M to $15M.
Which 401(k) plans are similar in size to Marinus Pharmaceuticals, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is The Gasparilla Inn, Inc. 401(k) Plan in FL ($12M, 306 participants).
Which 401(k) plans cover a similar participant headcount to Marinus Pharmaceuticals, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Eaze Solutions Inc. Retirement Trust in CA (154 participants, $3M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 200198082.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.