Flagship Pioneering 401(k) match, vesting and fees

Plan year 2024 filingFlagship Pioneering 401(k) Profit Sharing Plan · Plan 001 · EIN 75-2992246Updated Oct 2026

What Flagship Pioneering's 401(k) plan says about matching contributions

The match terms have not been published from this plan's filing yet.
The plan year 2024 filing reports $2.3M in employer contributions, about $3,792 per participant. That total includes any match and profit-sharing; it is not a match formula. Plan year 2024 Form 5500 ↗
$108,087
Average account balance
1,342
Participants (end of year)
$65M
Plan assets (end of year)
<0.01%
Admin expenses ÷ assets

Plan features

Match, vesting and enrollment details have not been published from this plan's audit report yet. The figures below come from the structured filing.

RecordkeeperFidelity Investments InstitutionalSchedule C ↗
Independent auditorErnst & Young LLP (unmodified opinion, limited scope)Schedule H ↗
Plan type and status401(k) · ActiveForm 5500 ↗

How the plan compares

Plan year 2024 medians for 1,287 defined-contribution plans in professional, scientific, and technical services with 500 to 999 participants.

Flagship Pioneering: employer contribution per participant$3,792
Peer median$2,600
Flagship Pioneering: average balance$108,087
Peer median$84,124
Flagship Pioneering: admin expenses ÷ assets<0.01%
Peer median0.17%

Admin expenses are the plan's reported administrative expenses divided by its assets; they do not include fund expense ratios.

Plan history

Plan assets went from $34.3M at the end of plan year 2021 to $65M at the end of plan year 2024.

$34.3M2021$33.5M2022$47.8M2023$65M2024
End-of-year figures from each plan year's Form 5500 filing for the Flagship Pioneering plan.
Plan yearParticipantsAssetsEmployer contributionsPer participantAdmin expense ratioMatch formulaFiling
20241,342$65M$2.3M$3,792<0.01%Not publishedForm 5500 ↗
2023549$47.8M$1.5M$2,923<0.01%Not publishedForm 5500 ↗
2022470$33.5M$948K$2,257<0.01%Not publishedForm 5500 ↗
2021320$34.3M$681K$2,349<0.01%Not publishedForm 5500 ↗

Common questions

Does Flagship Pioneering match 401(k) contributions?

The match terms for the Flagship Pioneering 401(k) Profit Sharing Plan have not been published from its filing yet. The plan year 2024 filing reports $2.3M in employer contributions, about $3,792 per participant. That total includes any match and profit-sharing; it is not a match formula.

When is the Flagship Pioneering 401(k) match vested?

The vesting schedule for the Flagship Pioneering 401(k) Profit Sharing Plan is not in the data published so far. Your Summary Plan Description states it.

Who manages the Flagship Pioneering 401(k)?

The recordkeeper listed on Schedule C of the plan year 2024 filing is Fidelity Investments Institutional. The plan administrator is Flagship Pioneering, Inc..

I left Flagship Pioneering. How do I find my old 401(k)?

Your account stays in the plan until you move it. Contact the plan administrator (Flagship Pioneering, Inc., (617) 868-1888) or the recordkeeper, Fidelity Investments Institutional. The Flagship Pioneering old 401(k) page lists the contacts from every plan filing. Find an old Flagship Pioneering 401(k)

Data from the public Form 5500 annual reports Flagship Pioneering filed with the U.S. Department of Labor (plan years 2021 and 2022 and 2023 and 2024) and, where noted, the attached independent auditor's report. Plan terms may have changed since the filing; check your current Summary Plan Description. PlanFacts is not affiliated with Flagship Pioneering. Not financial advice. Report a correction · Methodology