A123 Systems, Inc. 401(k) Plan: Login, Facts & Contact Information
A123 Systems, Inc. 401(k) Login
207 former A123 Systems, Inc. employees still have money in this plan.
Retirement plan providers can change. This information is from the plan's 2024 filing.
A123 Systems, Inc. 401(k) Plan Facts
Source: Form 5500 for plan year 2024 (Jan 1, 2024 – Dec 31, 2024), filed Sep 17, 2025. Public filing with the U.S. Department of Labor.
Money in and out in plan year 2024
- $1.58 million went into the plan in contributions, $468,388 of it from the employer (30%).
- $3.68 million was paid out to participants.
- Investment and other income added $3.10 million.
- Administrative expenses were $69,386, about $225 per account.
How the A123 Systems, Inc. 401(k) changed, 2019–2024
| Plan year | Participants | Plan assets | Employer contributions | Benefits paid |
|---|---|---|---|---|
| 2019 | 614 | $34.1 million | $1.77 million | $2.76 million |
| 2020 | 615 | $34.8 million | $721,314 | $9.56 million |
| 2021 | 471 | $31.1 million | $534,020 | $9.70 million |
| 2022 | 402 | $23.2 million | $448,900 | $3.75 million |
| 2023 | 389 | $24.4 million | $474,499 | $4.05 million |
| 2024 | 346 | $25.3 million | $468,388 | $3.68 million |
A123 Systems, Inc. 401(k) Contact Information
Questions about the A123 Systems, Inc. 401(k)
Does A123 Systems, Inc contribute to the 401(k)?
Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $468,388, 30% of all contributions.
Does the A123 Systems, Inc 401(k) have automatic enrollment?
Yes. The plan reports automatic enrollment of eligible employees.
How many people are in the A123 Systems, Inc 401(k) plan?
346 participants at the start of plan year 2024, 105 of them active employees, and 207 former employees who still had money in the plan.
What is the average 401(k) balance at A123 Systems, Inc?
About $81,968 per account: $25.3 million in plan assets across 309 accounts with a balance at the end of plan year 2024.
Who manages the A123 Systems, Inc 401(k) accounts?
Principal (listed on the filing as PRINCIPAL LIFE INSURANCE COMPANY) is the plan's recordkeeper, which is where participants log in to see their balance.
I no longer work at A123 Systems, Inc. How do I access my 401(k)?
Your account stays with Principal after you leave, so you can log in with the same credentials. If your balance was small, the plan may have rolled it into an IRA in your name. If you can't find it, Beagle can locate it for you.