Aspen Aerogels, Inc. 401(k) Plan: Login, Facts & Contact Information

Aspen Aerogels, Inc. 401(k) Plan Facts

Plan name
ASPEN AEROGELS, INC. 401(K) PLAN
Plan type
401(k) with employer contributions and profit sharing
Plan sponsor
ASPEN AEROGELS, INC.
Participants
626 (521 active employees)
Former employees with a balance
108
Plan assets
$40,687,824 at Dec 31, 2024
Average account balance
$65,205 across 624 accounts
Employer contributions
$1,591,938 in plan year 2024 (23% of all contributions)
Recordkeeper
Empower Annuity Ins Co Of America
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
May 1, 2005
Employer contributions Automatic enrollment Default investment for undecided participants Participants choose their own investments Self-directed brokerage window Profit sharing Company stock (ESOP)

Source: Form 5500 for plan year 2024 (Jan 1, 2024 – Dec 31, 2024), filed Aug 1, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $6.96 million went into the plan in contributions, $1.59 million of it from the employer (23%).
  • $4.63 million was paid out to participants.
  • Investment and other income added $5.15 million.
  • Administrative expenses were $134,031, about $215 per account.

How the Aspen Aerogels, Inc. 401(k) changed, 20192024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
2019325$18.7 million$246,190$2.02 million
2020338$21.2 million$236,384$2.00 million
2021333$24.3 million$271,623$2.54 million
2022462$24.4 million$1.20 million$1.31 million
2023587$33.4 million$1.48 million$3.28 million
2024626$40.7 million$1.59 million$4.63 million

Aspen Aerogels, Inc. 401(k) Contact Information

Phone
508-691-1187
Mailing address
30 FORBES ROAD, BUILDING B, NORTHBOROUGH MA 01532
Plan sponsor
ASPEN AEROGELS, INC.
Employer identification number (EIN)
04-3559972
Plan number
001

Questions about the Aspen Aerogels, Inc. 401(k)

Does Aspen Aerogels, Inc contribute to the 401(k)?

Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $1.59 million, 23% of all contributions.

Does the Aspen Aerogels, Inc 401(k) have automatic enrollment?

Yes. The plan reports automatic enrollment of eligible employees.

How many people are in the Aspen Aerogels, Inc 401(k) plan?

626 participants at the start of plan year 2024, 521 of them active employees, and 108 former employees who still had money in the plan.

What is the average 401(k) balance at Aspen Aerogels, Inc?

About $65,205 per account: $40.7 million in plan assets across 624 accounts with a balance at the end of plan year 2024.

Who manages the Aspen Aerogels, Inc 401(k) accounts?

Empower (listed on the filing as EMPOWER ANNUITY INS CO OF AMERICA) is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Aspen Aerogels, Inc. How do I access my 401(k)?

Your account stays with Empower 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.

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