401(k) · DOL Form 5500 · 2024

Tetra Tech, Inc. 401(k) Plan

Data updated 2026-08-25

$2.2B
Total assets Very large vs avg
11,882
Participants Very large workforce
99th
Percentile by assets National rank
$181,821
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. · Connecticut · Professional & Technical Services

$2.2B in assets, 11,882 participants

Tetra Tech, Inc.'s Tetra Tech, Inc. and Subsidiaries Retirement Plan reported $2.2B in total assets and 11,882 participants in its 2024 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.

  • #20,085 in Professional & Technical Services (20,173 peers)

Coverage in Connecticut

Tetra Tech, Inc. and Subsidiaries Retirement Plan covers 11,882 participants in Connecticut, 17x the typical Connecticut plan (state average ~718 per filing). Assets: $2.2B.

#20,085
in Professional & Technical Services (20,173 peers)
+9.1%
assets growth YoY
22×
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 2024 · DOL Form 5500

$2,160,392,069 Top 1% higher than 99% 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

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

Plan-year 2024 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 (11,882 participants), the rightmost band on the breakdown.

What changed between DOL Form 5500 filings

plan year 2023 → plan year 2024

  • Tetra Tech, Inc. and Subsidiaries Retirement Plan reported net income fell from $381M in the plan year 2023 filing to $178M in the plan year 2024 filing.
  • Tetra Tech, Inc. and Subsidiaries Retirement Plan reported participants rose from 10,689 in the plan year 2023 filing to 11,882 in the plan year 2024 filing.
  • Tetra Tech, Inc. and Subsidiaries Retirement Plan end-of-year assets rose from $2.0B in the plan year 2023 filing to $2.2B in the plan year 2024 filing.

See the national 2023→2024 release diff →

Published 5500 schedule card

Filing strip 954148514 · Tetra Tech, Inc. PY 2024 · 401(k)

Tetra Tech, Inc. and Subsidiaries Retirement Plan · $2.2B · 11,882 · 99th

  • PART $2.2B
  • TYPE 11,882
  • NET 99th
  • BOOK 401(k)
  • VS-ST near Medamerica 401(k) Profit Sharing Plan for Employees of Vituity
  • BOY ind #20085

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 Connecticut →

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

Tetra Tech, Inc. and Subsidiaries Retirement PlanTetra Tech, Inc. and Subsidi…$2.2BMedamerica 401(k) Profit Sharing Plan for Employees of VituityMedamerica 401(k) Profit Sha…$2.2BBiogen 401(k) Savings Plan$2.2BAllianz Asset Management of America 401(k) Savings and Retirement PlanAllianz Asset Management of …$2.2BAssurant 401(k) Plan$2.2B
End-of-year total assets ($B) among Tetra Tech, Inc. and Subsidiaries Retirement Plan and nearest nationwide 401(k) peers. Source: DOL Form 5500 plan year 2024.

Connecticut filing particulars

Total Assets (Beginning of Year)$2.0B
Net Assets (End of Year)$2.2B
Net Income$178M
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 Connecticut

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 Connecticut, assets vs. participants Scatter plot of 6 data points. 050000100000150000 -20020406080 Total assets ($B) Participants Tetra Tech, Inc. and Subsidiaries Retirement Plan, Total assets ($B): 2.160392069 · Participants: 11882Tetra Tech, Inc. and Subsidiaries Retirement PlanRtx Savings Plan, Total assets ($B): 58.647425 · Participants: 124876Rtx Savings PlanCiti Retirement Savings Plan, Total assets ($B): 23.241033081 · Participants: 78741Citi Retirement Savings PlanThe Hartford Investment and Savings Plan, Total assets ($B): 7.183243 · Participants: 18614The Hartford Investment and Savings PlanEversource 401(k) Plan, Total assets ($B): 4.046347175 · Participants: 10041Eversource 401(k) PlanXerox Corporation Savings Plan, Total assets ($B): 3.976943 · Participants: 9876Xerox Corporation Savings Plan
Tetra Tech, Inc. and Subsidiaries Retirement Plan vs. nearby 401(k) plans in Connecticut, 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 $2.2B in end-of-year assets across 11,882 participants (0.018% of the $12.3T held by all Form 5500 filers in the national rollup , and 0.013% of 93,925,755 covered participants) - about $181,821 per participant (1.3x the national average assets-per-participant) . Net income for plan year 2024 was $178M.

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 Open filing
2024 · index core 11,882 $2.2B This page

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

Outside Connecticut, the nearest 401(k) by assets is Medamerica 401(k) Profit Sharing Plan for Employees of Vituity in CA ($2.2B); by covered participants it is The Wendy's Company 401(k) Retirement Plan in OH (11,881 participants). Same-state nearby plans are listed separately above.

Closest by plan assets

Nearest other-state filings by tot_assets_eoy ($2.2B here).

Similar participant headcount

Nearest other-state filings by covered participants (11,882 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 Tetra Tech, Inc. and Subsidiaries Retirement Plan assets move in 2024? ▼
Tetra Tech, Inc. and Subsidiaries Retirement Plan grew at a solid clip - up 9.1% during 2024, from $2.0B to $2.2B. Reported net income was $178M.
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 123,622 plans that reported assets for plan year 2024 (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 Medamerica 401(k) Profit Sharing Plan for Employees of Vituity in CA ($2.2B, 5,429 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 The Wendy's Company 401(k) Retirement Plan in OH (11,881 participants, $294M 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 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.