Quanterix Corporation 401(k) Plan: Login, Facts & Contact Information

Quanterix Corporation 401(k) Plan Facts

Plan name
QUANTERIX CORPORATION 401(K) PROFIT SHARING PLAN AND TRUST
Plan type
401(k) and profit sharing
Plan sponsor
QUANTERIX CORPORATION
Participants
568 (412 active employees)
Former employees with a balance
333
Plan assets
$39,693,762 at Dec 31, 2024
Average account balance
$57,527 across 690 accounts
Employer contributions
$2,306,325 in plan year 2024 (23% of all contributions)
Recordkeeper
Fidelity Investments Institutional
Plan year
Jan 1, 2024 – Dec 31, 2024
Plan established
Jan 1, 2007
— 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 Oct 15, 2025. Public filing with the U.S. Department of Labor.

Money in and out in plan year 2024

  • $9.97 million went into the plan in contributions, $2.31 million of it from the employer (23%).
  • $5.08 million was paid out to participants.
  • Investment and other income added $5.12 million.
  • Administrative expenses were $106,496, about $154 per account.

How the Quanterix Corporation 401(k) changed, 2019–2024

Plan yearParticipantsPlan assetsEmployer contributionsBenefits paid
2019207$14.2 million$545,508$819,338
2020272$19.5 million$685,854$874,597
2021343$26.3 million$997,431$2.19 million
2022523$23.4 million$1.30 million$4.07 million
2023474$29.8 million$814,949$4.17 million
2024568$39.7 million$2.31 million$5.08 million

Quanterix Corporation 401(k) Contact Information

Phone
617-301-9439
Mailing address
900 MIDDLESEX TURNPIKE, BILLERICA MA 01821
Plan sponsor
QUANTERIX CORPORATION
Employer identification number (EIN)
20-8957988
Plan number
001

Questions about the Quanterix Corporation 401(k)

Does Quanterix Corporation contribute to the 401(k)?

The plan does not report an employer matching arrangement on its Form 5500. It did report $2.31 million in employer contributions for plan year 2024.

Does the Quanterix Corporation 401(k) have automatic enrollment?

No. The plan does not report automatic enrollment; employees enroll themselves.

How many people are in the Quanterix Corporation 401(k) plan?

568 participants at the start of plan year 2024, 412 of them active employees, and 333 former employees who still had money in the plan.

What is the average 401(k) balance at Quanterix Corporation?

About $57,527 per account: $39.7 million in plan assets across 690 accounts with a balance at the end of plan year 2024.

Who manages the Quanterix Corporation 401(k) accounts?

Fidelity NetBenefits (listed on the filing as FIDELITY INVESTMENTS INSTITUTIONAL) is the plan's recordkeeper, which is where participants log in to see their balance.

I no longer work at Quanterix Corporation. How do I access my 401(k)?

Your account stays with Fidelity NetBenefits 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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