401(k) · DOL Form 5500 · 2023

Flagship Pioneering, Inc. 401(k) Plan

Data updated 2026-08-25

$48M
Total assets Below avg plan size
357
Participants Below avg headcount
85th
Percentile by assets National rank
$133,816
Avg per participant Near avg balance/head
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Official DOL plan name: Flagship Pioneering 401(k) Profit Sharing Plan · Sponsored by Flagship Pioneering, Inc. · Massachusetts · Professional & Technical Services

$48M in assets, 357 participants

Flagship Pioneering, Inc.'s Flagship Pioneering 401(k) Profit Sharing Plan reported $48M in total assets and 357 participants in its 2023 DOL Form 5500 filing, ranking in the 85th percentile by assets among filed plans. Figures are as reported by the plan sponsor to the Department of Labor, not audited or endorsed by PlainRetire.

  • #17,508 in Professional & Technical Services (20,321 peers)

Where Flagship Pioneering 401(k) Profit Sharing Plan sits by assets

Flagship Pioneering 401(k) Profit Sharing Plan sits in the top quartile of all filed plans by assets, $48M for 357 participants (~$133,816/participant), up 42.8% in 2023.

#17,508
in Professional & Technical Services (20,321 peers)
+42.8%
assets growth YoY
0.5×
vs typical plan assets (national mean)

Flagship Pioneering 401(k) Profit Sharing Plan's outsized position by total assets

Flagship Pioneering 401(k) Profit Sharing Plan vs every filed plan by assets

End-of-year total assets · plan year 2023 · DOL Form 5500

$47,772,405 Top 15% higher than 85% of 127,068 filed plans

This plan $0 $2,050,000,000 every filed plan with reported assets, bucketed by value

Dashed line + filled bar = this entry, among filed plans.

Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023

Flagship Pioneering 401(k) Profit Sharing Plan among mid-size filed plans by headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Flagship Pioneering 401(k) Profit Sharing Plan sits mid-pack in the medium band (357 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Flagship Pioneering 401(k) Profit Sharing Plan reported net income rose from -$795K in the plan year 2022 filing to $14M in the plan year 2023 filing.
  • Flagship Pioneering 401(k) Profit Sharing Plan end-of-year assets rose from $33M in the plan year 2022 filing to $48M in the plan year 2023 filing.
  • Flagship Pioneering 401(k) Profit Sharing Plan reported participants rose from 256 in the plan year 2022 filing to 357 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Plan-year Form 5500 strip

Filing strip 752992246 · Flagship Pioneering, Inc. PY 2023 · 401(k)

Flagship Pioneering 401(k) Profit Sharing Plan · $48M · 357 · 85th

  • NET $48M
  • BOOK 357
  • VS-ST 85th
  • BOY 401(k)
  • SCH near The International Companies Savings and Profit Sharing Plan
  • EBSA ind #17508

Stamps derive from this plan's Form 5500 line items (assets, participants, type, EIN, cohort placement) - not a quality rating of the sponsor. Read with Professional & Technical Services retirement plans → · Plans in Massachusetts →

Flagship Pioneering 401(k) Profit Sharing Plan in the asset neighbourhood

Emergency Physicians of Northwest Ohio, Inc. Profit Sharing PlanEmergency Physicians of Nort…$48MFlagship Pioneering 401(k) Profit Sharing PlanFlagship Pioneering 401(k) P…$48MThe International Companies Savings and Profit Sharing PlanThe International Companies …$48MReiter Affiliated Companies 401(k) PlanReiter Affiliated Companies …$48MPioneer Physicians Network, Inc. 401(k) Profit Sharing PlanPioneer Physicians Network, …$48M
End-of-year total assets ($M) among Flagship Pioneering 401(k) Profit Sharing Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Scale-class filing particulars (2023)

Total Assets (Beginning of Year)$33M
Net Assets (End of Year)$48M
Net Income$14M
Employer EIN752992246
Plan Effective Date2002-09-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Flagship Pioneering, Inc.)

Sponsor-wide plan assets over time

All Flagship Pioneering, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$65M 94.1656283396414% vs 2022
2024 filing year
$30M$40M$50M$60M$70M 202220232024 $33.5M $65M ▲ +94.1%
Year Plans Participants Total Assets
2022 1 256 $33M
2023 1 357 $48M
2024 1 434 $65M

Nearby 401(k) Plans in Massachusetts

Peer 401(k) plans, same state, same plan type, ranked by total assets.

Flagship Pioneering 401(k) Profit Sharing Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Flagship Pioneering 401(k) Profit Sharing Plan, Total assets ($B): 0.047772405 · Participants: 357Flagship Pioneering 401(k) Profit Sharing PlanFidelity Retirement Savings Plan, Total assets ($B): 28.649852331 · Participants: 62289Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 10.556596852 · Participants: 37052Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 6.829912863 · Participants: 14094Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 5.786107181 · Participants: 19881Boston Scientific Corporation 401(k) Retirement Savings PlanPhilips North America 401(k) Plan, Total assets ($B): 5.779286156 · Participants: 19120Philips North America 401(k) Plan
Flagship Pioneering 401(k) Profit Sharing Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Flagship Pioneering 401(k) Profit Sharing Plan side-by-side with 3 peers →

Flagship Pioneering 401(k) Profit Sharing Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is The International Companies Savings and Profit Sharing Plan in MO ($48M); by covered participants it is Nexius Solutions, Inc. 401(k) Plan in DE (357 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (357 participants); asset peers above are excluded.

DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Flagship Pioneering 401(k) Profit Sharing Plan assets move in 2023? ▼
Flagship Pioneering 401(k) Profit Sharing Plan surged - up 42.8% during 2023, from $33M to $48M. Reported net income was $14M.
How have Flagship Pioneering, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Flagship Pioneering, Inc.'s sponsor-wide assets grew 94.2%, from $33M to $65M.
Where does Flagship Pioneering 401(k) Profit Sharing Plan rank by assets among Form 5500 filers? ▼
Flagship Pioneering 401(k) Profit Sharing Plan ranks in the 85th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to Flagship Pioneering 401(k) Profit Sharing Plan? ▼
Among 401(k) plans in other states, the closest by assets is The International Companies Savings and Profit Sharing Plan in MO ($48M, 398 participants).
Which 401(k) plans cover a similar participant headcount to Flagship Pioneering 401(k) Profit Sharing Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Nexius Solutions, Inc. 401(k) Plan in DE (357 participants, $9M in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2023.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 752992246.

Read our methodology - how this data is sourced, computed, and verified.

Data sourced from U.S. Department of Labor Form 5500 filings (EBSA). See our methodology for details.