401(k) · DOL Form 5500 · 2023

Seres Therapeutics, Inc. 401(k) Plan

Data updated 2026-08-25

$39M
Total assets Below avg plan size
419
Participants Below avg headcount
83rd
Percentile by assets National rank
$93,844
Avg per participant Below avg balance/head
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Official DOL plan name: Seres Therapeutics, Inc. 401(k) Plan · Sponsored by Seres Therapeutics, Inc. · Massachusetts · Information & Media

$39M in assets, 419 participants

Seres Therapeutics, Inc.'s Seres Therapeutics, Inc. 401(k) Plan reported $39M in total assets and 419 participants in its 2023 DOL Form 5500 filing, ranking in the 83rd 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.

  • #2,152 in Information & Media (2,818 peers)

Where Seres Therapeutics, Inc. 401(k) Plan sits by assets

Seres Therapeutics, Inc. 401(k) Plan sits in the top quartile of all filed plans by assets, $39M for 419 participants (~$93,844/participant), up 47.5% in 2023.

#2,152
in Information & Media (2,818 peers)
+47.5%
assets growth YoY
0.4×
vs typical plan assets (national mean)

Seres Therapeutics, Inc. 401(k) Plan's outsized position by total assets

Seres Therapeutics, Inc. 401(k) Plan vs every filed plan by assets

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

$39,320,733 Top 17% higher than 83% 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

Seres Therapeutics, Inc. 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. Seres Therapeutics, Inc. 401(k) Plan sits mid-pack in the medium band (419 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Seres Therapeutics, Inc. 401(k) Plan reported net income rose from $3M in the plan year 2022 filing to $13M in the plan year 2023 filing.
  • Seres Therapeutics, Inc. 401(k) Plan end-of-year assets rose from $27M in the plan year 2022 filing to $39M in the plan year 2023 filing.
  • Seres Therapeutics, Inc. 401(k) Plan reported participants rose from 332 in the plan year 2022 filing to 419 in the plan year 2023 filing.

See the national 2022→2023 release diff →

Form 5500 schedule snapshot

Filing strip 274326290 · Seres Therapeutics, Inc. PY 2023 · 401(k)

Seres Therapeutics, Inc. 401(k) Plan · $39M · 419 · 83rd

  • RANK $39M
  • PHOTO 419
  • IND 83rd
  • EOY 401(k)
  • 5500 near National Association of Boards of Pharmacy Retirement Savings Plan
  • ASSETS ind #2152

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 Information & Media retirement plans → · Plans in Massachusetts →

Seres Therapeutics, Inc. 401(k) Plan in the asset neighbourhood

Care Design Ny 401(k) Plan$39MDenmar Technical Services, Inc. Profit Sharing PlanDenmar Technical Services, I…$39MSeres Therapeutics, Inc. 401(k) PlanSeres Therapeutics, Inc. 401…$39MNational Association of Boards of Pharmacy Retirement Savings PlanNational Association of Boar…$39MPowercon Corporation 401(k) Retirement PlanPowercon Corporation 401(k) …$39M
End-of-year total assets ($M) among Seres Therapeutics, Inc. 401(k) Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

Scale-class filing particulars (2023)

Total Assets (Beginning of Year)$27M
Net Assets (End of Year)$39M
Net Income$13M
Employer EIN274326290
Plan Effective Date2013-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Seres Therapeutics, Inc.)

Sponsor-wide plan assets over time

All Seres Therapeutics, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$39M 46.620542392773196% vs 2022
2024 filing year
$25M$30M$35M$40M$45M 202220232024 $26.7M $39.1M ▲ +46.6%
Year Plans Participants Total Assets
2022 1 332 $27M
2023 1 419 $39M
2024 1 244 $39M

Nearby 401(k) Plans in Massachusetts

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

Seres Therapeutics, Inc. 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Seres Therapeutics, Inc. 401(k) Plan, Total assets ($B): 0.039320733 · Participants: 419Seres Therapeutics, Inc. 401(k) 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
Seres Therapeutics, Inc. 401(k) Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Seres Therapeutics, Inc. 401(k) Plan side-by-side with 3 peers →

Seres Therapeutics, Inc. 401(k) Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is National Association of Boards of Pharmacy Retirement Savings Plan in IL ($39M); by covered participants it is Grecian Delight/Kronos Retirement Savings Plan in IL (419 participants). Same-state nearby plans are listed separately above.

Similar participant headcount

Nearest other-state filings by covered participants (419 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 Seres Therapeutics, Inc. 401(k) Plan assets move in 2023? ▼
Seres Therapeutics, Inc. 401(k) Plan surged - up 47.5% during 2023, from $27M to $39M. Reported net income was $13M.
How have Seres Therapeutics, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Seres Therapeutics, Inc.'s sponsor-wide assets grew 46.6%, from $27M to $39M.
Where does Seres Therapeutics, Inc. 401(k) Plan rank by assets among Form 5500 filers? ▼
Seres Therapeutics, Inc. 401(k) Plan ranks in the 83rd 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 Seres Therapeutics, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by assets is National Association of Boards of Pharmacy Retirement Savings Plan in IL ($39M, 164 participants).
Which 401(k) plans cover a similar participant headcount to Seres Therapeutics, Inc. 401(k) Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Grecian Delight/Kronos Retirement Savings Plan in IL (419 participants, N/A 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 274326290.

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.