Aspen Aerogels, Inc. 401(k) Plan
ERISA Form 5500 plan record drawn from DOL EBSA — verify with linked source filings below.
Sponsored by Aspen Aerogels, Inc. · Massachusetts · Manufacturing
What the 2023 filing shows
Aspen Aerogels, Inc. 401(k) Plan holds $33M for 507 participants — about $65,843 per participant, up 36.6% over the 2023 plan year.
- $33M
- total plan assets (2023 EOY)
- 507
- covered participants
- $65,843
- avg assets per participant
- +36.6%
- assets growth YoY
What the Filing Says About Aspen Aerogels, Inc. 401(k) Plan
Aspen Aerogels, Inc. 401(k) Plan is a 401(k) retirement plan sponsored by Aspen Aerogels, Inc., headquartered in Massachusetts. As of the 2023 Form 5500 filing, the plan reports $33M in total end-of-year assets and covers 507 participants across the Manufacturing industry. The sponsor's EIN on file with the U.S. Department of Labor is 043559972, and the plan has been effective since 2005-05-01. Its filing status is currently FILING RECEIVED.
Year over year, total assets moved from $24M at the beginning of 2023 to $33M at year-end — a gain of 36.6%. Net assets (after liabilities) closed the year at $33M, with reported net income of $9M 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.
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.
Financial Summary (2023)
| Total Assets (Beginning of Year) | $24M |
| Total Assets (End of Year) | $33M |
| Net Assets (End of Year) | $33M |
| Net Income | $9M |
| Plan Type | 401(k) |
| Employer EIN | 043559972 |
| Plan Effective Date | 2005-05-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Aspen Aerogels, Inc.)
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 1 | 397 | $24M |
| 2023 | 1 | 507 | $33M |
| 2024 | 1 | 517 | $41M |
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Related Data
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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 043559972.
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.
Read our methodology — how this data is sourced, computed, and verified.