401(k) · DOL Form 5500 · 2024

Ironwood Pharmaceuticals, Inc. 401(k) Plan

Data updated 2026-08-25

$88M
Total assets Below avg plan size
216
Participants Below avg headcount
89th
Percentile by assets National rank
$406,454
Avg per participant High balance/head
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Official DOL plan name: Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan · Sponsored by Ironwood Pharmaceuticals, Inc. · Massachusetts · Professional & Technical Services

$88M in assets, 216 participants

Ironwood Pharmaceuticals, Inc.'s Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan reported $88M in total assets and 216 participants in its 2024 DOL Form 5500 filing, ranking in the 89th 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.

  • #18,265 in Professional & Technical Services (20,173 peers)

Coverage in Massachusetts

Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan covers 216 participants in Massachusetts, about 33% of the average Massachusetts filer (state average ~659 per filing). Assets: $88M.

#18,265
in Professional & Technical Services (20,173 peers)
+11.8%
assets growth YoY
0.9×
vs typical plan assets (national mean)

Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan's outsized position by total assets

Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan vs every filed plan by assets

End-of-year total assets · plan year 2024 · DOL Form 5500

$87,794,016 Top 11% higher than 89% of 123,620 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 2024

Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan among mid-size filed plans by headcount

Plan-year 2024 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan sits mid-pack in the medium band (216 participants).

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan end-of-year assets rose from $79M in the plan year 2023 filing to $88M in the plan year 2024 filing.
  • Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan reported net income rose from $9M in the plan year 2023 filing to $9M in the plan year 2024 filing.
  • Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan reported participants fell from 219 in the plan year 2023 filing to 216 in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 043404176 · Ironwood Pharmaceuticals, Inc. PY 2024 · 401(k)

Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan · $88M · 216 · 89th

  • VS-ST $88M
  • VS-ST 216
  • VS-ST 89th
  • VS-ST 401(k)
  • VS-ST near Orion Group 401(k) Plan
  • VS-ST ind #18265

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 →

Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan in the asset neighbourhood

Orion Group 401(k) Plan$88MHarvest Sherwood Food Distributors Employee 401(k) PlanHarvest Sherwood Food Distri…$88MIronwood Pharmaceuticals, Inc. 401(k) Savings PlanIronwood Pharmaceuticals, In…$88MFive Below 401(k) Retirement Savings PlanFive Below 401(k) Retirement…$88MTpusa 401(k) Plan$88M
End-of-year total assets ($M) among Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Massachusetts filing particulars

Total Assets (Beginning of Year)$79M
Net Assets (End of Year)$88M
Net Income$9M
Employer EIN043404176
Plan Effective Date1999-01-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Ironwood Pharmaceuticals, Inc.)

Sponsor-wide plan assets over time

All Ironwood Pharmaceuticals, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$88M 26.37423498791993% vs 2022
2024 filing year
$60M$70M$80M$90M 202220232024 $69.5M $87.8M ▲ +26.4%
Year Plans Participants Total Assets
2022 1 220 $69M
2023 1 219 $79M
2024 1 216 $88M

Nearby 401(k) Plans in Massachusetts

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

Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants Scatter plot of 6 data points. -20000020000400006000080000 -10010203040 Total assets ($B) Participants Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan, Total assets ($B): 0.087794016 · Participants: 216Ironwood Pharmaceuticals, Inc. 401(k) Savings PlanFidelity Retirement Savings Plan, Total assets ($B): 34.201609937 · Participants: 66907Fidelity Retirement Savings PlanLiberty Mutual 401(k) Plan, Total assets ($B): 11.352606499 · Participants: 34618Liberty Mutual 401(k) PlanMassachusetts Institute of Technology Supplemental 401(k) Plan, Total assets ($B): 7.720373045 · Participants: 14762Massachusetts Institute of Technology Supplemental 401(k) PlanBoston Scientific Corporation 401(k) Retirement Savings Plan, Total assets ($B): 6.775289067 · Participants: 20639Boston Scientific Corporation 401(k) Retirement Savings PlanState Street Salary Savings Program, Total assets ($B): 6.532301643 · Participants: 12777State Street Salary Savings Program
Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan vs. nearby 401(k) plans in Massachusetts, assets vs. participants
Compare Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan side-by-side with 3 peers →

Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan's out-of-state 401(k) peers by assets and headcount

Outside Massachusetts, the nearest 401(k) by assets is Orion Group 401(k) Plan in NY ($88M); by covered participants it is Garden of Life 401(k) Plan in FL (216 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($88M here).

Similar participant headcount

Nearest other-state filings by covered participants (216 participants); asset peers above are excluded.

DOL Form 5500 plan year 2024. Asset totals can differ widely at the same headcount; neither axis is a quality rating.

Frequently Asked Questions

How did Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan assets move in 2024? ▼
Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan grew at a solid clip - up 11.8% during 2024, from $79M to $88M. Reported net income was $9M.
How have Ironwood Pharmaceuticals, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Ironwood Pharmaceuticals, Inc.'s sponsor-wide assets grew 26.4%, from $69M to $88M.
Where does Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan rank by assets among Form 5500 filers? ▼
Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan ranks in the 89th percentile by end-of-year assets among 123,622 plans that reported assets for plan year 2024 (in the top quartile of all filed plans by assets).
Which 401(k) plans are similar in size to Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan? ▼
Among 401(k) plans in other states, the closest by assets is Orion Group 401(k) Plan in NY ($88M, 877 participants).
Which 401(k) plans cover a similar participant headcount to Ironwood Pharmaceuticals, Inc. 401(k) Savings Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Garden of Life 401(k) Plan in FL (216 participants, N/A in assets).

Source: U.S. Department of Labor, Employee Benefits Security Administration (EBSA), Form 5500 public disclosure dataset. Plan year 2024.

Source: DOL EFAST2 filing system (efast.dol.gov) - original filing retrieval by EIN 043404176.

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.