401(k) · DOL Form 5500 · 2023

Tetra Tech, Inc. 401(k) Plan

Data updated 2026-08-25

$2.0B
Total assets Very large vs avg
10,689
Participants Very large workforce
99th
Percentile by assets National rank
$185,283
Avg per participant Above avg balance/head
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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.

  • #20,233 in Professional & Technical Services (20,321 peers)

Coverage in California

Tetra Tech, Inc. and Subsidiaries Retirement Plan covers 10,689 participants in California, 17x the typical California plan (state average ~630 per filing). Assets: $2.0B.

#20,233
in Professional & Technical Services (20,321 peers)
+29.3%
assets growth YoY
20×
vs typical plan assets (national mean)

Tetra Tech, Inc. and Subsidiaries Retirement Plan's outsized position by total assets

Tetra Tech, Inc. and Subsidiaries Retirement Plan vs every filed plan by assets

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

$1,980,492,350 Top 1% higher than 99% 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

Tetra Tech, Inc. and Subsidiaries Retirement Plan's mega-plan peer group by participant headcount

Plan-year 2023 Form 5500 filings with a reported participant count, partitioned by headcount band, not by assets. Tetra Tech, Inc. and Subsidiaries Retirement Plan is a mega filing (10,689 participants), the rightmost band on the breakdown.

What changed between DOL Form 5500 filings

plan year 2022 → plan year 2023

  • 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 2022→2023 release diff →

Plan-year Form 5500 strip

Filing strip 954148514 · Tetra Tech, Inc. PY 2023 · 401(k)

Tetra Tech, Inc. and Subsidiaries Retirement Plan · $2.0B · 10,689 · 99th

  • 5500 $2.0B
  • 5500 10,689
  • 5500 99th
  • 5500 401(k)
  • 5500 near Stifel Financial Profit Sharing 401(k) Plan
  • 5500 ind #20233

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 California →

Tetra Tech, Inc. and Subsidiaries Retirement Plan in the asset neighbourhood

Tetra Tech, Inc. and Subsidiaries Retirement PlanTetra Tech, Inc. and Subsidi…$2.0BStifel Financial Profit Sharing 401(k) PlanStifel Financial Profit Shar…$2.0BAir Liquide & Airgas 401(k) PlanAir Liquide & Airgas 401(k) …$2.0BGeneral Dynamics Corporation 401(k) Plan for Represented EmployeesGeneral Dynamics Corporation…$2.0BCampbell Soup Company 401(k) Retirement PlanCampbell Soup Company 401(k)…$2.0B
End-of-year total assets ($B) among Tetra Tech, Inc. and Subsidiaries Retirement Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2023.

California filing particulars

Total Assets (Beginning of Year)$1.5B
Net Assets (End of Year)$2.0B
Net Income$381M
Employer EIN954148514
Plan Effective Date1988-03-08
Filing StatusFILING RECEIVED

Sponsor Plan History (Tetra Tech, Inc.)

Sponsor-wide plan assets over time

All Tetra Tech, Inc. plans reported in each filing year

Latest sponsor-wide plan assets
$2.2B 41.116067802524306% vs 2022
2024 filing year
$1.4B$1.6B$1.8B$2B$2.2B$2.4B 202220232024 $1.53B $2.16B ▲ +41.2%
Year Plans Participants Total Assets
2022 2 9,967 $1.5B
2023 2 10,703 $2.0B
2024 2 11,996 $2.2B

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 Scatter plot of 6 data points. 050000100000150000200000250000 -200204060 Total assets ($B) Participants Tetra Tech, Inc. and Subsidiaries Retirement Plan, Total assets ($B): 1.98049235 · Participants: 10689Tetra Tech, Inc. and Subsidiaries Retirement PlanWells Fargo & Company 401(k) Plan, Total assets ($B): 51.831350351 · Participants: 193919Wells Fargo & Company 401(k) PlanGoogle LLC 401(k) Savings Plan, Total assets ($B): 39.047152408 · Participants: 122867Google LLC 401(k) Savings PlanOracle Corporation 401(k) Savings and Investment Plan, Total assets ($B): 26.320437734 · Participants: 63105Oracle Corporation 401(k) Savings and Investment PlanIntel 401(k) Savings Plan, Total assets ($B): 22.17918189 · Participants: 59863Intel 401(k) Savings PlanApple 401(k) Plan, Total assets ($B): 19.779511539 · Participants: 106111Apple 401(k) Plan
Tetra Tech, Inc. and Subsidiaries Retirement Plan vs. nearby 401(k) plans in California, assets vs. participants
Compare Tetra Tech, Inc. and Subsidiaries Retirement Plan side-by-side with 3 peers →

Scale composition for Tetra Tech, Inc. and Subsidiaries Retirement Plan

Tetra Tech, Inc. and Subsidiaries Retirement Plan reports $2.0B in end-of-year assets across 10,689 participants (0.016% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.011% of 93,925,755 covered participants) - about $185,283 per participant (1.3x the national average assets-per-participant) . Net income for plan year 2023 was $381M.

This plan identity (EIN 954148514, plan #001) has 3 Form 5500 filings on file from 2022 to 2024 , with end-of-year assets moving from $1.5B to $2.2B (+41.0%) while covered participants moved from 9,951 to 11,882 . Single-year sparse filers cannot show that trail.

Plan year Participants EOY assets Filing
2022 9,951 $1.5B Open filing
2023 10,689 $2.0B This page
2024 · index core 11,882 $2.2B Open filing

The same sponsor also keeps 1 other index-core plan on PlainRetire:

Tetra Tech, Inc. and Subsidiaries Retirement Plan's out-of-state 401(k) peers by assets and headcount

Outside California, the nearest 401(k) by assets is Stifel Financial Profit Sharing 401(k) Plan in MO ($2.0B); by covered participants it is Lennar Corporation 401(k) Plan in FL (10,681 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($2.0B here).

Similar participant headcount

Nearest other-state filings by covered participants (10,689 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 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 3 plan years on file (2022-2024), Tetra Tech, Inc.'s sponsor-wide assets grew 41.1%, from $1.5B to $2.2B.
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 127,072 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).
Which 401(k) plans cover a similar participant headcount to Tetra Tech, Inc. and Subsidiaries Retirement Plan? ▼
Among 401(k) plans in other states, the closest by covered participants is Lennar Corporation 401(k) Plan in FL (10,681 participants, $1.4B 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 954148514.

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.