401(k) · DOL Form 5500 · 2023
Generation Bio Co. 401(k) Plan
Data updated 2026-08-25
- $16M
- Total assets Small plan by assets
- 153
- Participants Small participant base
- 68th
- Percentile by assets National rank
- $103,234
- Avg per participant Below avg balance/head
Official DOL plan name: Generation Bio 401(k) Plan · Sponsored by Generation Bio Co. · Massachusetts · Manufacturing
$16M in assets, 153 participants
Generation Bio Co.'s Generation Bio 401(k) Plan reported $16M in total assets and 153 participants in its 2023 DOL Form 5500 filing, ranking in the 68th 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.
- #10,646 in Manufacturing (18,722 peers)
Coverage in Massachusetts
Generation Bio 401(k) Plan covers 153 participants in Massachusetts, about 23% of the average Massachusetts filer (state average ~659 per filing). Assets: $16M.
- #10,646
- in Manufacturing (18,722 peers)
- +79.3%
- assets growth YoY
Generation Bio 401(k) Plan's outsized position by total assets
Generation Bio 401(k) Plan vs every filed plan by assets
End-of-year total assets · plan year 2023 · DOL Form 5500
$15,794,761 Top 32% higher than 68% of 127,068 filed plans
Dashed line + filled bar = this entry, among filed plans.
Source U.S. Department of Labor Form 5500 filings (EBSA) · plan year 2023
Generation Bio 401(k) 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. Generation Bio 401(k) Plan sits mid-pack in the medium band (153 participants).
What changed between DOL Form 5500 filings
plan year 2022 → plan year 2023
- Generation Bio 401(k) Plan reported net income rose from $1M in the plan year 2022 filing to $7M in the plan year 2023 filing.
- Generation Bio 401(k) Plan end-of-year assets rose from $9M in the plan year 2022 filing to $16M in the plan year 2023 filing.
- Generation Bio 401(k) Plan reported participants fell from 158 in the plan year 2022 filing to 153 in the plan year 2023 filing.
DOL schedule card
Filing strip 814301284 · Generation Bio Co. PY 2023 · 401(k)
Generation Bio 401(k) Plan · $16M · 153 · 68th
- ASSETS $16M
- ASSETS 153
- ASSETS 68th
- ASSETS 401(k)
- ASSETS near Rize Home's 401(k) Plan
- ASSETS ind #10646
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 Manufacturing retirement plans → · Plans in Massachusetts →
Generation Bio 401(k) Plan in the asset neighbourhood
Massachusetts filing particulars
| Total Assets (Beginning of Year) | $9M |
|---|---|
| Net Assets (End of Year) | $16M |
| Net Income | $7M |
| Employer EIN | 814301284 |
| Plan Effective Date | 2019-01-01 |
| Filing Status | FILING RECEIVED |
Sponsor Plan History (Generation Bio Co.)
Sponsor-wide plan assets over time
All Generation Bio Co. plans reported in each filing year
- Latest sponsor-wide plan assets
- $17M 97.38422454956628% vs 2022
- 2024 filing year
| Year | Plans | Participants | Total Assets |
|---|---|---|---|
| 2022 | 1 | 158 | $9M |
| 2023 | 1 | 153 | $16M |
| 2024 | 1 | 174 | $17M |
Nearby 401(k) Plans in Massachusetts
Peer 401(k) plans, same state, same plan type, ranked by total assets.
- Fidelity Retirement Savings Plan $28.6B · 62,289
- Liberty Mutual 401(k) Plan $10.6B · 37,052
- Massachusetts Institute of Technology Supplemental 401(k) Plan $6.8B · 14,094
- Boston Scientific Corporation 401(k) Retirement Savings Plan $5.8B · 19,881
- Philips North America 401(k) Plan $5.8B · 19,120
Generation Bio 401(k) Plan's out-of-state 401(k) peers by assets and headcount
Outside Massachusetts, the nearest 401(k) by assets is Rize Home's 401(k) Plan in OH ($16M); by covered participants it is Enven Energy Ventures LLC 401(k) Profit Sharing Plan and Trust in TX (153 participants). Same-state nearby plans are listed separately above.
Closest by plan assets
Nearest other-state filings by tot_assets_eoy ($16M here).
- Rize Home's 401(k) Plan (OH) $16M · 161
- Gridtek 401(k) Plan (FL) $16M · 456
- The Citizens Bank 401(k) Plan (AR) $16M · 220
- Wolf-Gordon, Inc. Profit Sharing Plan (NY) $16M · 104
Similar participant headcount
Nearest other-state filings by covered participants (153 participants); asset peers above are excluded.
- Enven Energy Ventures LLC 401(k) Profit Sharing Plan and Trust (TX) 153 · 0 off
- Austin Csi, LLC 401(k) Plan (TX) 153 · 0 off
- Halsey Grocery 401(k) Plan (AL) 153 · 0 off
- Easy Auto 401(k) Plan (TN) 153 · 0 off
DOL Form 5500 plan year 2023. Asset totals can differ widely at the same headcount; neither axis is a quality rating.