401(k) · DOL Form 5500 · 2023

Thornton Tomasetti, Inc. 401(k) Plan

Data updated 2026-08-11

$389M
Total assets: 1,075
Participants: 97th
Percentile by assets: $361,985
Avg per participant

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.

97th percentile by assets (of 127,072 plans)
#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.

$389M
total plan assets (2023 EOY): 1,075
covered participants: 97th
percentile by assets (of 127,072 plans): $361,985
avg assets per participant

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 →

State

New York

Industry

Professional & Technical Services

Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan vs the 2023 asset distribution

By assets, Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan outranks 97% of the 127,072 plans that filed a Form 5500 for the 2023 plan year, and holds roughly 3.9x the national average plan size of $100M (721 average participants).

Scale-class filing particulars (2023)

Total Assets (Beginning of Year)	$318M
Net Assets (End of Year)	$389M
Net Income	$71M
Employer EIN	131251070
Plan Effective Date	1992-02-01
Filing Status	FILING RECEIVED

Sponsor Plan History (Thornton Tomasetti, Inc.)

Total plan assets by year, all Thornton Tomasetti, Inc. plans on file

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

IBM 401 (K) Plus Plan $57.4B · 54,912
Pfizer Savings Plan $19.6B · 30,033
Morgan Stanley 401(k) Plan $19.2B · 55,363
The Pepsico Savings Plan $13.7B · 133,597
The Goldman Sachs 401(k) Plan $11.4B · 24,866

Compare Thornton Tomasetti, Inc. 401(k) Profit S… side-by-side with 3 peers →

Similar-Sized 401(k) Plans Nationally

401(k) plans in other states closest to Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan by total assets, not by location.

Abt Associates Inc. Profit Sharing and Savings Plan (MA) $389M · 1,228
Cwt 401(k) Plan (MN) $389M · 2,690
Stepan Company Savings and Investment Retirement Plan (IL) $389M · 1,274
Duncan Aviation, Inc. 401(k) Retirement Plan (NE) $389M · 2,727

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).

Next read for Thornton Tomasetti, Inc. 401(k) Profit S…

Scale reading

Ways to act on Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan's numbers.

By total assets, Thornton Tomasetti, Inc. 401(k) Profit Sharing Plan ranks in the top 5% of all filed plans by assets. See the largest plans
Compare it side-by-side against 3 similar 401(k) plans in New York. Compare plans
Thornton Tomasetti, Inc.'s sponsor-wide assets have grown 47.5% since 2022 across 3 plan years on file. More Professional & Technical Services plans

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.