Defined Benefit (Pension) · DOL Form 5500 · 2024

Unitil Corporation Retirement Plan

Data updated 2026-05-15

$179M
Total assets
167
Participants
94th
Percentile by assets
$1.1M
Avg per participant

Sponsored by Unitil Service Corp. · New Hampshire · Utilities

What the 2024 filing shows

Unitil Corporation Retirement Plan holds $179M for 167 participants - about $1.1M per participant, in the top 10% of all filed plans by assets, up 9.1% over the 2024 plan year.

$179M
total plan assets (2024 EOY)
167
covered participants
94th
percentile by assets (of 116,472 plans)
$1.1M
avg assets per participant
Industry
Utilities

Defined Benefit (Pension) · DOL Form 5500 · 2024

What the Filing Says About Unitil Corporation Retirement Plan

Unitil Corporation Retirement Plan is a Defined Benefit (Pension) retirement plan sponsored by Unitil Service Corp., headquartered in New Hampshire. According to the U.S. Department of Labor's 2024 Form 5500 filing, the plan reports $179M in total end-of-year assets and covers 167 participants across the Utilities industry. The sponsor's EIN on file with the U.S. Department of Labor is 020383661, and the plan has been effective since 1985-01-01. Its filing status is currently FILING RECEIVED.

Year over year, total assets grew at a solid clip from $164M at the beginning of 2024 to $179M at year-end - up 9.1%. Net assets (after liabilities) closed the year at $179M, with reported net income of $15M driven by investment returns, contributions received, and benefit payments during the period. These figures reflect what the plan administrator certified on Schedule H or Schedule I of the Form 5500 annual return and can be compared against 2 prior plan-year filings from the same sponsor shown below.

Across the 3 plan years Unitil Service Corp. has on file with PlainRetire (2022-2024), sponsor-wide plan assets have moved from $148M to $179M, a gain of 20.7%, while reported participants moved from 207 to 167 (-19.3%). The strongest year on file by total sponsor assets was 2024 at $179M; the softest was 2022 at $148M. Year-by-year, sponsor-wide filings show: 2022 - $148M in assets across 1 plan covering 207 participants; 2023 - $164M in assets across 1 plan covering 178 participants; 2024 - $179M in assets across 1 plan covering 167 participants.

By assets, Unitil Corporation Retirement Plan outranks 94% of the 116,472 plans that filed a Form 5500 for the 2024 plan year, and holds roughly 1.8x the national average plan size of $100M and 730 average participants.

Asset totals and participant counts reflect a single plan year snapshot and can change materially with market conditions, plan mergers, or workforce changes. Fields such as "net income" include both realized investment performance and contribution/distribution flows, a single-year figure does not by itself indicate plan health or participant outcomes. This page summarizes public DOL disclosures for research and educational purposes only and is not retirement, tax, legal, or financial advice. Before making decisions about your own retirement benefits or evaluating an employer's plan, verify the underlying filing directly via the DOL EFAST2 system and consult a qualified professional.

How the percentile is calculated: we count every plan that filed a 2024 Form 5500 with a reported end-of-year asset figure (116,472 plans), rank Unitil Corporation Retirement Plan against all of them by total assets, and report the share of those plans it outranks. A plan reporting no asset figure for the year is excluded from the ranking rather than assumed to be zero.

Financial Summary (2024)

Total Assets (Beginning of Year)$164M
Total Assets (End of Year)$179M
Net Assets (End of Year)$179M
Net Income$15M
Plan TypeDefined Benefit (Pension)
Employer EIN020383661
Plan Effective Date1985-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Unitil Service Corp.)

Year Plans Participants Total Assets
2022 1 207 $148M
2023 1 178 $164M
2024 1 167 $179M

Nearby Defined Benefit (Pension) Plans in New Hampshire

Peer Defined Benefit (Pension) plans, same state, same plan type, ranked by total assets.

Frequently Asked Questions

How much money is in the Unitil Corporation Retirement Plan?
As of the 2024 Form 5500 filing, Unitil Corporation Retirement Plan holds $179M in total assets with 167 participants. It is sponsored by Unitil Service Corp..
What type of plan is Unitil Corporation Retirement Plan?
Unitil Corporation Retirement Plan is a Defined Benefit (Pension) plan. It has been effective since 1985-01-01. The plan is filed with the U.S. Department of Labor under EIN 020383661.
Who sponsors the Unitil Corporation Retirement Plan?
Unitil Corporation Retirement Plan is sponsored by Unitil Service Corp., located in New Hampshire. The sponsor's EIN is 020383661 and the plan operates in the Utilities industry.
How did Unitil Corporation Retirement Plan perform in 2024?
Unitil Corporation Retirement Plan grew at a solid clip - up 9.1% during 2024, moving from $164M to $179M in total assets. Net income was $15M.

What this filing means

Ways to act on Unitil Corporation Retirement Plan's numbers.

  • By total assets, Unitil Corporation Retirement Plan ranks in the top 10% of all filed plans by assets. See the largest plans
  • Compare it side-by-side against 3 similar Defined Benefit (Pension) plans in New Hampshire. Compare plans
  • Unitil Service Corp.'s sponsor-wide assets have grown 20.7% since 2022 across 3 plan years on file. More Utilities plans
  • A Defined Benefit (Pension) plan works differently from other retirement plan types, understand the structural differences before comparing. Compare plan types

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 020383661.

Reference: IRS Publication 560, Retirement Plans for Small Business, contribution-limit rules.

Reference: IRS Publication 590-B, Distributions from IRAs, RMD rules under SECURE Act 2.0.

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

Every figure on PlainRetire is rendered directly from the Department of Labor's Form 5500 annual return filings, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of 2026-05-15.