401(k) · DOL Form 5500 · 2023

Tetra Tech, Inc. 401(k) Plan

Data updated 2026-08-06

$2.0B
Total assets: 10,689
Participants: 99th
Percentile by assets: $185,283
Avg per participant

Official DOL plan name: Tetra Tech, Inc. and Subsidiaries Retirement Plan · Sponsored by Tetra Tech, Inc. · California · Professional & Technical Services

$2.0B in assets, 10,689 participants

Tetra Tech, Inc.'s Tetra Tech, Inc. and Subsidiaries Retirement Plan reported $2.0B in total assets and 10,689 participants in its 2023 DOL Form 5500 filing, ranking in the 99th 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.

99th percentile by assets (of 126,618 plans)
#20,183 in Professional & Technical Services (20,271 peers)

Coverage in California

Tetra Tech, Inc. and Subsidiaries Retirement Plan covers 10,689 participants in California, 17x the typical California plan (state average ~637 per filing). Assets: $2.0B.

$2.0B
total plan assets (2023 EOY): 10,689
covered participants: 99th
percentile by assets (of 126,618 plans): $185,283
avg assets per participant

Tetra Tech, Inc. and Subsidiaries Retirement Plan reported net income rose from $175M in the plan year 2022 filing to $381M in the plan year 2023 filing.
Tetra Tech, Inc. and Subsidiaries Retirement Plan end-of-year assets rose from $1.5B in the plan year 2022 filing to $2.0B in the plan year 2023 filing.
Tetra Tech, Inc. and Subsidiaries Retirement Plan reported participants rose from 9,951 in the plan year 2022 filing to 10,689 in the plan year 2023 filing.

See the national 2023→2024 release diff →

State

California

Industry

Professional & Technical Services

Participants vs California filers

In California, the average filing covers about 637 participants across 14,392 plans. Tetra Tech, Inc. and Subsidiaries Retirement Plan reports 10,689 participants - 17x that state average ($2.0B EOY assets).

California filing particulars

Total Assets (Beginning of Year)	$1.5B
Net Assets (End of Year)	$2.0B
Net Income	$381M
Employer EIN	954148514
Plan Effective Date	1988-03-08
Filing Status	FILING RECEIVED

Sponsor Plan History (Tetra Tech, Inc.)

Total plan assets by year, all Tetra Tech, Inc. plans on file

Year	Plans	Participants	Total Assets
2022	2	9,967	$1.5B
2023	2	10,703	$2.0B

Nearby 401(k) Plans in California

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

Tetra Tech, Inc. and Subsidiaries Retirement Plan vs. nearby 401(k) plans in California, assets vs. participants

Wells Fargo & Company 401(k) Plan $51.8B · 193,919
Google LLC 401(k) Savings Plan $39.0B · 122,867
Oracle Corporation 401(k) Savings and Investment Plan $26.3B · 63,105
Intel 401(k) Savings Plan $22.2B · 59,863
Apple 401(k) Plan $19.8B · 106,111

Compare Tetra Tech, Inc. and Subsidiaries Retire… side-by-side with 3 peers →

Similar-Sized 401(k) Plans Nationally

401(k) plans in other states closest to Tetra Tech, Inc. and Subsidiaries Retirement Plan by total assets, not by location.

Stifel Financial Profit Sharing 401(k) Plan (MO) $2.0B · 8,353
Air Liquide & Airgas 401(k) Plan (TX) $2.0B · 17,298
General Dynamics Corporation 401(k) Plan for Represented Employees (VA) $2.0B · 16,900
Campbell Soup Company 401(k) Retirement Plan (NJ) $2.0B · 14,136

Frequently Asked Questions

How did Tetra Tech, Inc. and Subsidiaries Retirement Plan assets move in 2023? ▼

Tetra Tech, Inc. and Subsidiaries Retirement Plan grew sharply - up 29.3% during 2023, from $1.5B to $2.0B. Reported net income was $381M.

How have Tetra Tech, Inc. plan assets changed over time? ▼

Across 2 plan years on file (2022-2023), Tetra Tech, Inc.'s sponsor-wide assets grew 29.3%, from $1.5B to $2.0B.

Where does Tetra Tech, Inc. and Subsidiaries Retirement Plan rank by assets among Form 5500 filers? ▼

Tetra Tech, Inc. and Subsidiaries Retirement Plan ranks in the 99th percentile by end-of-year assets among 126,618 plans that reported assets for plan year 2023 (among the largest 1% of all filed plans).

Which 401(k) plans are similar in size to Tetra Tech, Inc. and Subsidiaries Retirement Plan? ▼

Among 401(k) plans in other states, the closest by assets is Stifel Financial Profit Sharing 401(k) Plan in MO ($2.0B, 8,353 participants).

Next read for Tetra Tech, Inc. and Subsidiaries Retire…

Filing takeaways

Ways to act on Tetra Tech, Inc. and Subsidiaries Retirement Plan's numbers.

By total assets, Tetra Tech, Inc. and Subsidiaries Retirement Plan ranks among the largest 1% of all filed plans. See the largest plans
Compare it side-by-side against 3 similar 401(k) plans in California. Compare plans
Tetra Tech, Inc.'s sponsor-wide assets have grown 29.3% since 2022 across 2 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 954148514.