401(k) · DOL Form 5500 · 2023

Thornton Tomasetti, Inc. 401(k) Plan

Data updated 2026-08-25

$389M
Total assets Above avg plan size
1,075
Participants Near avg headcount
97th
Percentile by assets National rank
$361,985
Avg per participant High balance/head
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Official DOL plan name: Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan · Sponsored by Thornton Tomasetti, Inc. · New York · Professional & Technical Services

$389M in assets, 1,075 participants

Thornton Tomasetti, Inc.'s Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan reported $389M in total assets and 1,075 participants in its 2023 DOL Form 5500 filing, ranking in the 97th 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.

  • #19,864 in Professional & Technical Services (20,321 peers)

Where Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan sits by assets

Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan sits in the top 5% of all filed plans by assets, $389M for 1,075 participants (~$361,985/participant), up 22.5% in 2023.

#19,864
in Professional & Technical Services (20,321 peers)
+22.5%
assets growth YoY
3.9×
vs typical plan assets (national mean)

Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan's outsized position by total assets

Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan vs every filed plan by assets

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

$389,134,269 Top 3% higher than 97% 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

Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan's large-plan peer group by participant headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan lands in the large band (1,075 participants).

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan reported net income rose from -$78M in the plan year 2022 filing to $71M in the plan year 2023 filing.
  • Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan end-of-year assets rose from $318M in the plan year 2022 filing to $389M in the plan year 2023 filing.

See the national 2022→2023 release diff →

Published 5500 schedule card

Filing strip 131251070 · Thornton Tomasetti, Inc. PY 2023 · 401(k)

Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan · $389M · 1,075 · 97th

  • IND $389M
  • EOY 1,075
  • 5500 97th
  • ASSETS 401(k)
  • PCT near Abt Associates Inc. Profit Sharing and Savings Plan
  • EIN ind #19864

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 New York →

Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan in the asset neighbourhood

Stepan Company Savings and Investment Retirement PlanStepan Company Savings and I…$389MCwt 401(k) Plan$389MThornton Tomasetti, Inc. 401(k) Profit Sharing PlanThornton Tomasetti, Inc. 401…$389MAbt Associates Inc. Profit Sharing and Savings PlanAbt Associates Inc. Profit S…$389MDuncan Aviation, Inc. 401(k) Retirement PlanDuncan Aviation, Inc. 401(k)…$389M
End-of-year total assets ($M) among Thornton Tomasetti, Inc. 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)$318M
Net Assets (End of Year)$389M
Net Income$71M
Employer EIN131251070
Plan Effective Date1992-02-01
Filing StatusFILING RECEIVED

Sponsor Plan History (Thornton Tomasetti, Inc.)

Sponsor-wide plan assets over time

All Thornton Tomasetti, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$469M 47.519300538833456% vs 2022
2024 filing year
$300M$350M$400M$450M$500M 202220232024 $318M $469M ▲ +47.5%
Year Plans Participants Total Assets
2022 1 1,083 $318M
2023 1 1,075 $389M
2024 1 1,131 $469M

Nearby 401(k) Plans in New York

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

Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan vs. nearby 401(k) plans in New York, assets vs. participants Scatter plot of 6 data points. -50000050000100000150000 -20020406080 Total assets ($B) Participants Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan, Total assets ($B): 0.389134269 · Participants: 1075Thornton Tomasetti, Inc. 401(k) Profit Sharing PlanIBM 401 (K) Plus Plan, Total assets ($B): 57.428456306 · Participants: 54912IBM 401 (K) Plus PlanPfizer Savings Plan, Total assets ($B): 19.56134085 · Participants: 30033Pfizer Savings PlanMorgan Stanley 401(k) Plan, Total assets ($B): 19.235068266 · Participants: 55363Morgan Stanley 401(k) PlanThe Pepsico Savings Plan, Total assets ($B): 13.651296 · Participants: 133597The Pepsico Savings PlanThe Goldman Sachs 401(k) Plan, Total assets ($B): 11.428659742 · Participants: 24866The Goldman Sachs 401(k) Plan
Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan vs. nearby 401(k) plans in New York, assets vs. participants
Compare Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan side-by-side with 3 peers →

Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan's out-of-state 401(k) peers by assets and headcount

Outside New York, the nearest 401(k) by assets is Abt Associates Inc. Profit Sharing and Savings Plan in MA ($389M); by covered participants it is Kyocera Retirement Savings Plan in CA (1,075 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($389M here).

Similar participant headcount

Nearest other-state filings by covered participants (1,075 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 Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan assets move in 2023? ▼
Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan grew sharply - up 22.5% during 2023, from $318M to $389M. Reported net income was $71M.
How have Thornton Tomasetti, Inc. plan assets changed over time? ▼
Across 3 plan years on file (2022-2024), Thornton Tomasetti, Inc.'s sponsor-wide assets grew 47.5%, from $318M to $469M.
Where does Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan rank by assets among Form 5500 filers? ▼
Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan ranks in the 97th percentile by end-of-year assets among 127,072 plans that reported assets for plan year 2023 (in the top 5% of all filed plans by assets).
Which 401(k) plans are similar in size to Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan? ▼
Among 401(k) plans in other states, the closest by assets is Abt Associates Inc. Profit Sharing and Savings Plan in MA ($389M, 1,228 participants).
Which 401(k) plans cover a similar participant headcount to Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Kyocera Retirement Savings Plan in CA (1,075 participants, $253M 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 131251070.

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.