401(k) · DOL Form 5500 · 2022

Mainline Investment Partners, LLC 401(k) Plan

Data updated 2026-08-25

$14M
Total assets Small plan by assets
185
Participants Below avg headcount
71st
Percentile by assets National rank
$75,650
Avg per participant Below avg balance/head
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Official DOL plan name: Mainline Merion 401(k) Plan · Sponsored by Mainline Investment Partners, LLC · Pennsylvania · Finance & Insurance

$14M in assets, 185 participants

Mainline Investment Partners, LLC's Mainline Merion 401(k) Plan reported $14M in total assets and 185 participants in its 2022 DOL Form 5500 filing, ranking in the 71st 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.

  • #5,173 in Finance & Insurance (9,261 peers)

Coverage in Pennsylvania

Mainline Merion 401(k) Plan covers 185 participants in Pennsylvania, about 23% of the average Pennsylvania filer (state average ~822 per filing). Assets: $14M.

#5,173
in Finance & Insurance (9,261 peers)
-20.5%
assets change YoY

The plan reported a net loss of $4M for the year, a single-year figure driven by markets and benefit payments, not a measure of plan health.

Mainline Merion 401(k) Plan's outsized position by total assets

Mainline Merion 401(k) Plan vs every filed plan by assets

End-of-year total assets · plan year 2022 · DOL Form 5500

$13,995,331 Top 29% higher than 71% of 139,123 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 2022

Mainline Merion 401(k) Plan among mid-size filed plans by headcount

Plan-year 2022 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Mainline Merion 401(k) Plan sits mid-pack in the medium band (185 participants).

DOL schedule card

Filing strip 452845118 · Mainline Investment Partners, LLC PY 2022 · 401(k)

Mainline Merion 401(k) Plan · $14M · 185 · 71st

  • SCH $14M
  • SCH 185
  • SCH 71st
  • SCH 401(k)
  • SCH near Edgeworth Economics 401(k) Plan
  • SCH ind #5173

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 Finance & Insurance retirement plans → · Plans in Pennsylvania →

Mainline Merion 401(k) Plan in the asset neighbourhood

Mainline Merion 401(k) Plan$14MEdgeworth Economics 401(k) PlanEdgeworth Economics 401(k) P…$14MGreat American Restaurants Profit Sharing PlanGreat American Restaurants P…$14MUssi Global 401(k) Plan$14MPaynecrest Electric, Inc. Profit Sharing & 401(k) PlanPaynecrest Electric, Inc. Pr…$14M
End-of-year total assets ($M) among Mainline Merion 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2022.

Pennsylvania filing particulars

Total Assets (Beginning of Year)$18M
Net Assets (End of Year)$14M
Net Income-$4M
Employer EIN452845118
Plan Effective Date2005-07-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Mainline Investment Partners, LLC)

Sponsor-wide plan assets over time

All Mainline Investment Partners, LLC plans reported in each filing year

Latest sponsor-wide plan assets
$20M 46.435979256224805% vs 2022
2024 filing year
$12M$14M$16M$18M$20M$22M 202220232024 $14M $20.5M ▲ +46.4%
Year Plans Participants Total Assets
2022 1 185 $14M
2023 1 116 $17M
2024 1 117 $20M

Nearby 401(k) Plans in Pennsylvania

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

Mainline Merion 401(k) Plan vs. nearby 401(k) plans in Pennsylvania, assets vs. participants Scatter plot of 6 data points. -50000050000100000150000 -505101520 Total assets ($B) Participants Mainline Merion 401(k) Plan, Total assets ($B): 0.013995331 · Participants: 185Mainline Merion 401(k) PlanComcast Corporation Retirement - Investment Plan, Total assets ($B): 14.751564896 · Participants: 97769Comcast Corporation Retirement - Investment PlanCigna 401(k) Plan, Total assets ($B): 11.46087279 · Participants: 66147Cigna 401(k) PlanThe PNC Financial Services Group, Inc. Incentive Savings Plan, Total assets ($B): 8.11713 · Participants: 59451The PNC Financial Services Group, Inc. Incentive Savings PlanThe Vanguard Retirement and Savings Plan, Total assets ($B): 8.097254785 · Participants: 17073The Vanguard Retirement and Savings PlanThe Bank of New York Mellon Corporation 401(k) Savings Plan, Total assets ($B): 7.823164827 · Participants: 25071The Bank of New York Mellon Corporation 401(k) Savings Plan
Mainline Merion 401(k) Plan vs. nearby 401(k) plans in Pennsylvania, assets vs. participants
Compare Mainline Merion 401(k) Plan side-by-side with 3 peers →

Mainline Merion 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Pennsylvania, the nearest 401(k) by assets is Edgeworth Economics 401(k) Plan in DC ($14M); by covered participants it is Brew City Pizza, Inc. Retirement Plan in WI (185 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($14M here).

Similar participant headcount

Nearest other-state filings by covered participants (185 participants); asset peers above are excluded.

DOL Form 5500 plan year 2022. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Mainline Merion 401(k) Plan assets move in 2022? ▼
Mainline Merion 401(k) Plan declined sharply - down 20.5% during 2022, from $18M to $14M. Reported net income was -$4M.
How have Mainline Investment Partners, LLC plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Mainline Investment Partners, LLC's sponsor-wide assets grew 46.4%, from $14M to $20M.
Which 401(k) plans are similar in size to Mainline Merion 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is Edgeworth Economics 401(k) Plan in DC ($14M, 68 participants).
Which 401(k) plans cover a similar participant headcount to Mainline Merion 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Brew City Pizza, Inc. Retirement Plan in WI (185 participants, N/A in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2022.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 452845118.

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.