Mass General Brigham Incorporated 401(k) Plan: Login, Facts & Contact Information
Mass General Brigham Incorporated 401(k) Login
4,511 former Mass General Brigham Incorporated employees still have money in this plan.
Retirement plan providers can change. This information is from the plan's 2024 filing.
Mass General Brigham Incorporated 401(k) Plan Facts
Source: Form 5500 for plan year 2024 (Oct 1, 2024 – Sep 30, 2025), filed Jul 2, 2026. Public filing with the U.S. Department of Labor.
Money in and out in plan year 2024
- $7.39 million went into the plan in contributions, $7.08 million of it from the employer (96%).
- $63.2 million was paid out to participants.
- Investment and other income added $72.3 million.
- Administrative expenses were $111,407, about $11 per account.
How the Mass General Brigham Incorporated 401(k) changed, 2019–2024
| Plan year | Participants | Plan assets | Employer contributions | Benefits paid |
|---|---|---|---|---|
| 2019 | 12,284 | $596.5 million | $3.18 million | $55.0 million |
| 2020 | 12,417 | $670.1 million | $5.25 million | $38.6 million |
| 2021 | 11,967 | $515.1 million | $4.37 million | $50.0 million |
| 2022 | 10,817 | $544.2 million | $4.97 million | $43.0 million |
| 2023 | 10,399 | $628.8 million | $5.19 million | $44.1 million |
| 2024 | 10,028 | $645.2 million | $7.08 million | $63.2 million |
Mass General Brigham Incorporated 401(k) Contact Information
Questions about the Mass General Brigham Incorporated 401(k)
Does Mass General Brigham Incorporated contribute to the 401(k)?
Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $7.08 million, 96% of all contributions.
Does the Mass General Brigham Incorporated 401(k) have automatic enrollment?
Yes. The plan reports automatic enrollment of eligible employees.
How many people are in the Mass General Brigham Incorporated 401(k) plan?
10,028 participants at the start of plan year 2024, 5,255 of them active employees, and 4,511 former employees who still had money in the plan.
What is the average 401(k) balance at Mass General Brigham Incorporated?
About $65,463 per account: $645.2 million in plan assets across 9,856 accounts with a balance at the end of plan year 2024.
Who manages the Mass General Brigham Incorporated 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 Mass General Brigham Incorporated. 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.