Civic Intelligence

Tetra Tech Inc.

Plan context: Tetra Tech Inc. and Subsidiaries Retirement Plan

EIN 95-4148514 • Pasadena, CA • 131 filings • 17 plans

3475 E. Foothill BoulevardPasadena, CA 91107
Current Snapshot

Latest Year

2024

2024 Participants

7,917

2024 Assets

$1,981,566,710

2024 Contributions

$123,483,216

Historical Graphs

Total Assets Over Time

Aggregate end-of-year assets by filing year, excluding zero-asset years

$1,981,566,710$990,783,355$0199920112023YearValue
$1,981,566,710Latest year 2023

Participants Over Time

Largest reported end-of-year plan headcount by filing year, used to avoid double-counting participants across overlapping plans

12,3076,1540199920122024YearValue
7,917Latest year 2024

Company Timeline

Year summaries and individual filings are combined here so you can stay in one place while moving across years and plan filings.

Year / FilingFilingsParticipantsAssetsContributionsContrib./Participant
202417,917$0$0-
Tetra Tech Inc. Group Benefit Plan-7,917---
2023612,307$1,981,566,710$123,483,216$10,034iApproximate average salary by contribution assumption: employee only about $250,839 at 4% or $167,226 at 6%; with 50% employer match about $167,226 at 4% or $111,484 at 6%; with 100% employer match about $125,420 at 4% or $83,613 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-12,307$1,980,492,350$123,134,052$10,005iApproximate average salary by contribution assumption: employee only about $250,130 at 4% or $166,753 at 6%; with 50% employer match about $166,753 at 4% or $111,169 at 6%; with 100% employer match about $125,065 at 4% or $83,377 at 6%.
TETRA TECH, INC. PUERTO RICO RETIREMENT PLAN-111$1,074,360$349,164$3,146iApproximate average salary by contribution assumption: employee only about $78,641 at 4% or $52,427 at 6%; with 50% employer match about $52,427 at 4% or $34,951 at 6%; with 100% employer match about $39,320 at 4% or $26,214 at 6%.
Tetra Tech Inc. Group Benefit Plan-7,368---
Tetra Tech Inc. Group Life, Disability and Vision Plan-0---
Tetra Tech Inc. Flexible Spending Plan-0---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-0---
2022610,360$1,532,279,057$112,455,464$10,855iApproximate average salary by contribution assumption: employee only about $271,369 at 4% or $180,913 at 6%; with 50% employer match about $180,913 at 4% or $120,609 at 6%; with 100% employer match about $135,685 at 4% or $90,456 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-10,360$1,531,716,308$112,313,053$10,841iApproximate average salary by contribution assumption: employee only about $271,026 at 4% or $180,684 at 6%; with 50% employer match about $180,684 at 4% or $120,456 at 6%; with 100% employer match about $135,513 at 4% or $90,342 at 6%.
TETRA TECH, INC. PUERTO RICO RETIREMENT PLAN-17$562,749$142,411$8,377iApproximate average salary by contribution assumption: employee only about $209,428 at 4% or $139,619 at 6%; with 50% employer match about $139,619 at 4% or $93,079 at 6%; with 100% employer match about $104,714 at 4% or $69,809 at 6%.
Tetra Tech Inc. Group Benefit Plan-6,259---
Tetra Tech Inc. Group Life, Disability and Vision Plan-6,259---
Tetra Tech Inc. Flexible Spending Plan-1,284---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-5,033---
2021610,218$1,354,962,559$92,425,304$9,045iApproximate average salary by contribution assumption: employee only about $226,134 at 4% or $150,756 at 6%; with 50% employer match about $150,756 at 4% or $100,504 at 6%; with 100% employer match about $113,067 at 4% or $75,378 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-10,218$1,354,589,156$92,296,332$9,033iApproximate average salary by contribution assumption: employee only about $225,818 at 4% or $150,545 at 6%; with 50% employer match about $150,545 at 4% or $100,364 at 6%; with 100% employer match about $112,909 at 4% or $75,273 at 6%.
TETRA TECH, INC. PUERTO RICO RETIREMENT PLAN-18$373,403$128,972$7,165iApproximate average salary by contribution assumption: employee only about $179,128 at 4% or $119,419 at 6%; with 50% employer match about $119,419 at 4% or $79,612 at 6%; with 100% employer match about $89,564 at 4% or $59,709 at 6%.
Tetra Tech Inc. Group Benefit Plan-6,119---
Tetra Tech Inc. Group Life, Disability and Vision Plan-5,612---
Tetra Tech Inc. Flexible Spending Plan-1,332---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-1,201---
202068,833$1,577,322,610$86,629,267$9,807iApproximate average salary by contribution assumption: employee only about $245,186 at 4% or $163,458 at 6%; with 50% employer match about $163,458 at 4% or $108,972 at 6%; with 100% employer match about $122,593 at 4% or $81,729 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-8,833$1,576,988,660$86,500,339$9,793iApproximate average salary by contribution assumption: employee only about $244,822 at 4% or $163,214 at 6%; with 50% employer match about $163,214 at 4% or $108,810 at 6%; with 100% employer match about $122,411 at 4% or $81,607 at 6%.
TETRA TECH, INC. PUERTO RICO RETIREMENT PLAN-21$333,950$128,928$6,139iApproximate average salary by contribution assumption: employee only about $153,486 at 4% or $102,324 at 6%; with 50% employer match about $102,324 at 4% or $68,216 at 6%; with 100% employer match about $76,743 at 4% or $51,162 at 6%.
Tetra Tech Inc. Flexible Spending Plan-1,355---
Tetra Tech Inc. Group Benefit Plan-5,817---
Tetra Tech Inc. Group Life, Disability and Vision Plan-5,857---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-1,164---
201968,833$1,300,486,326$85,836,167$9,718iApproximate average salary by contribution assumption: employee only about $242,942 at 4% or $161,961 at 6%; with 50% employer match about $161,961 at 4% or $107,974 at 6%; with 100% employer match about $121,471 at 4% or $80,981 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-8,833$1,300,314,570$85,706,284$9,703iApproximate average salary by contribution assumption: employee only about $242,574 at 4% or $161,716 at 6%; with 50% employer match about $161,716 at 4% or $107,811 at 6%; with 100% employer match about $121,287 at 4% or $80,858 at 6%.
TETRA TECH, INC. PUERTO RICO RETIREMENT PLAN-22$171,756$129,883$5,904iApproximate average salary by contribution assumption: employee only about $147,594 at 4% or $98,396 at 6%; with 50% employer match about $98,396 at 4% or $65,597 at 6%; with 100% employer match about $73,797 at 4% or $49,198 at 6%.
Tetra Tech Inc. Group Benefit Plan-5,992---
Tetra Tech Inc. Group Life, Disability and Vision Plan-5,685---
Tetra Tech Inc. Flexible Spending Plan-1,372---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,016---
201858,701$1,156,926,058$74,540,680$8,567iApproximate average salary by contribution assumption: employee only about $214,173 at 4% or $142,782 at 6%; with 50% employer match about $142,782 at 4% or $95,188 at 6%; with 100% employer match about $107,086 at 4% or $71,391 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-8,701$1,156,926,058$74,540,680$8,567iApproximate average salary by contribution assumption: employee only about $214,173 at 4% or $142,782 at 6%; with 50% employer match about $142,782 at 4% or $95,188 at 6%; with 100% employer match about $107,086 at 4% or $71,391 at 6%.
Tetra Tech Inc. Group Benefit Plan-5,768---
Tetra Tech Inc. Group Life, Disability and Vision Plan-5,929---
Tetra Tech Inc. Flexible Spending Plan-1,271---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-872---
201757,750$1,119,573,738$69,057,398$8,911iApproximate average salary by contribution assumption: employee only about $222,766 at 4% or $148,511 at 6%; with 50% employer match about $148,511 at 4% or $99,007 at 6%; with 100% employer match about $111,383 at 4% or $74,255 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-7,651$1,119,573,738$69,057,398$9,026iApproximate average salary by contribution assumption: employee only about $225,648 at 4% or $150,432 at 6%; with 50% employer match about $150,432 at 4% or $100,288 at 6%; with 100% employer match about $112,824 at 4% or $75,216 at 6%.
Tetra Tech Inc. Group Benefit Plan-5,883---
Tetra Tech Inc. Group Life, Disability and Vision Plan-7,750---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-849---
Tetra Tech Inc. Flexible Spending Plan-1,584---
201658,447$1,022,075,017$58,271,633$6,899iApproximate average salary by contribution assumption: employee only about $172,463 at 4% or $114,975 at 6%; with 50% employer match about $114,975 at 4% or $76,650 at 6%; with 100% employer match about $86,231 at 4% or $57,488 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-8,107$1,022,075,017$58,271,633$7,188iApproximate average salary by contribution assumption: employee only about $179,695 at 4% or $119,797 at 6%; with 50% employer match about $119,797 at 4% or $79,865 at 6%; with 100% employer match about $89,848 at 4% or $59,898 at 6%.
Tetra Tech Inc. Group Benefit Plan-4,586---
Tetra Tech Inc. Group Life, Disability and Vision Plan-8,447---
Tetra Tech Inc. Flexible Spending Plan-1,592---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-1,136---
201558,446$888,787,259$50,111,008$5,933iApproximate average salary by contribution assumption: employee only about $148,328 at 4% or $98,885 at 6%; with 50% employer match about $98,885 at 4% or $65,923 at 6%; with 100% employer match about $74,164 at 4% or $49,443 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-8,054$888,787,259$50,111,008$6,222iApproximate average salary by contribution assumption: employee only about $155,547 at 4% or $103,698 at 6%; with 50% employer match about $103,698 at 4% or $69,132 at 6%; with 100% employer match about $77,773 at 4% or $51,849 at 6%.
Tetra Tech Inc. Group Benefit Plan-5,648---
Tetra Tech Inc. Group Life, Disability and Vision Plan-8,446---
Tetra Tech Inc. Flexible Spending Plan-1,387---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-1,136---
201458,446$788,652,252$49,102,081$5,814iApproximate average salary by contribution assumption: employee only about $145,341 at 4% or $96,894 at 6%; with 50% employer match about $96,894 at 4% or $64,596 at 6%; with 100% employer match about $72,671 at 4% or $48,447 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-7,693$788,652,252$49,102,081$6,383iApproximate average salary by contribution assumption: employee only about $159,567 at 4% or $106,378 at 6%; with 50% employer match about $106,378 at 4% or $70,919 at 6%; with 100% employer match about $79,784 at 4% or $53,189 at 6%.
Tetra Tech Inc. Group Benefit Plan-4,475---
Tetra Tech Inc. Group Life, Disability and Vision Plan-8,446---
Tetra Tech Inc. Flexible Spending Plan-1,627---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,015---
201358,689$798,606,545$50,076,833$5,763iApproximate average salary by contribution assumption: employee only about $144,081 at 4% or $96,054 at 6%; with 50% employer match about $96,054 at 4% or $64,036 at 6%; with 100% employer match about $72,041 at 4% or $48,027 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-7,859$798,606,545$50,076,833$6,372iApproximate average salary by contribution assumption: employee only about $159,298 at 4% or $106,198 at 6%; with 50% employer match about $106,198 at 4% or $70,799 at 6%; with 100% employer match about $79,649 at 4% or $53,099 at 6%.
Tetra Tech Inc. Group Benefit Plan-4,619---
Tetra Tech Inc. Group Life, Disability and Vision Plan-8,689---
Tetra Tech Inc. Flexible Spending Plan-1,624---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,525---
201259,009$724,583,472$52,223,203$5,797iApproximate average salary by contribution assumption: employee only about $144,920 at 4% or $96,613 at 6%; with 50% employer match about $96,613 at 4% or $64,409 at 6%; with 100% employer match about $72,460 at 4% or $48,307 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-7,773$724,583,472$52,223,203$6,719iApproximate average salary by contribution assumption: employee only about $167,963 at 4% or $111,976 at 6%; with 50% employer match about $111,976 at 4% or $74,650 at 6%; with 100% employer match about $83,982 at 4% or $55,988 at 6%.
Tetra Tech Inc. Group Benefit Plan-4,737---
Tetra Tech Inc. Group Life, Disability and Vision Plan-9,009---
Tetra Tech Inc. Flexible Spending Plan-1,747---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,345---
201167,914$624,346,694$55,837,991$7,056iApproximate average salary by contribution assumption: employee only about $176,390 at 4% or $117,593 at 6%; with 50% employer match about $117,593 at 4% or $78,396 at 6%; with 100% employer match about $88,195 at 4% or $58,797 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-7,914$624,346,694$55,837,991$7,056iApproximate average salary by contribution assumption: employee only about $176,390 at 4% or $117,593 at 6%; with 50% employer match about $117,593 at 4% or $78,396 at 6%; with 100% employer match about $88,195 at 4% or $58,797 at 6%.
TETRA TECH EAST TENNESSEE TECHNOLOGY PARK RETIREMENT SAVINGS PLAN-0---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,303---
Tetra Tech Inc. Flexible Spending Plan-1,605---
Tetra Tech Inc. Group Benefit Plan-5,001---
Tetra Tech Inc. Group Life, Disability and Vision Plan-5,963---
201067,940$513,660,197$54,432,259$6,855iApproximate average salary by contribution assumption: employee only about $171,386 at 4% or $114,257 at 6%; with 50% employer match about $114,257 at 4% or $76,172 at 6%; with 100% employer match about $85,693 at 4% or $57,129 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-7,940$510,737,758$54,432,259$6,855iApproximate average salary by contribution assumption: employee only about $171,386 at 4% or $114,257 at 6%; with 50% employer match about $114,257 at 4% or $76,172 at 6%; with 100% employer match about $85,693 at 4% or $57,129 at 6%.
M & I (MANAGEMENT & INTEGRATION) 401(K) PLAN-0$2,922,439--
Tetra Tech Inc. Group Benefit Plan-5,165---
Tetra Tech Inc. Group Life, Disability and Vision Plan-5,877---
Tetra Tech Inc. Flexible Spending Plan-1,569---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,560---
200965,906$2,746,141$0-
M & I (MANAGEMENT & INTEGRATION) 401(K) PLAN-0$2,746,141--
Tetra Tech Inc. and Subsidiaries Retirement Plan-----
Tetra Tech Inc. Group Life, Disability and Vision Plan-5,906---
Tetra Tech Inc. Group Benefit Plan-4,937---
Tetra Tech Inc. Flexible Spending Plan-1,574---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,849---
200846,498$2,386,402$131,442$20iApproximate average salary by contribution assumption: employee only about $506 at 4% or $337 at 6%; with 50% employer match about $337 at 4% or $225 at 6%; with 100% employer match about $253 at 4% or $169 at 6%.
M & I MANAGEMENT & INTEGRATION 401K PLAN-18$2,386,402$131,442$7,302iApproximate average salary by contribution assumption: employee only about $182,558 at 4% or $121,706 at 6%; with 50% employer match about $121,706 at 4% or $81,137 at 6%; with 100% employer match about $91,279 at 4% or $60,853 at 6%.
Tetra Tech Inc. Group Life, Disability and Vision Plan-6,498---
Tetra Tech Inc. Flexible Spending Plan-1,411---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-3,052---
200759,915$397,170,166$54,444,706$5,491iApproximate average salary by contribution assumption: employee only about $137,279 at 4% or $91,519 at 6%; with 50% employer match about $91,519 at 4% or $61,013 at 6%; with 100% employer match about $68,639 at 4% or $45,760 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-9,915$397,170,166$54,444,706$5,491iApproximate average salary by contribution assumption: employee only about $137,279 at 4% or $91,519 at 6%; with 50% employer match about $91,519 at 4% or $61,013 at 6%; with 100% employer match about $68,639 at 4% or $45,760 at 6%.
Tetra Tech Inc. Group Life, Disability and Vision Plan-5,962---
Tetra Tech Inc. Flexible Spending Plan-1,386---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,824---
M & I MANAGEMENT & INTEGRATION 401K PLAN-15---
200659,617$441,982,746$45,113,288$4,691iApproximate average salary by contribution assumption: employee only about $117,275 at 4% or $78,183 at 6%; with 50% employer match about $78,183 at 4% or $52,122 at 6%; with 100% employer match about $58,637 at 4% or $39,092 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-9,617$438,492,753$44,956,156$4,675iApproximate average salary by contribution assumption: employee only about $116,866 at 4% or $77,911 at 6%; with 50% employer match about $77,911 at 4% or $51,941 at 6%; with 100% employer match about $58,433 at 4% or $38,955 at 6%.
M & I MANAGEMENT & INTEGRATION 401K PLAN-14$3,489,993$157,132$11,224iApproximate average salary by contribution assumption: employee only about $280,593 at 4% or $187,062 at 6%; with 50% employer match about $187,062 at 4% or $124,708 at 6%; with 100% employer match about $140,296 at 4% or $93,531 at 6%.
Tetra Tech Inc. Group Life, Disability and Vision Plan-6,284---
Tetra Tech Inc. Flexible Spending Plan-1,569---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,785---
200559,153$377,128,375$45,863,658$5,011iApproximate average salary by contribution assumption: employee only about $125,269 at 4% or $83,513 at 6%; with 50% employer match about $83,513 at 4% or $55,675 at 6%; with 100% employer match about $62,635 at 4% or $41,756 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-9,153$373,859,664$45,648,900$4,987iApproximate average salary by contribution assumption: employee only about $124,683 at 4% or $83,122 at 6%; with 50% employer match about $83,122 at 4% or $55,415 at 6%; with 100% employer match about $62,341 at 4% or $41,561 at 6%.
M & I MANAGEMENT & INTEGRATION 401K PLAN-22$3,268,711$214,758$9,762iApproximate average salary by contribution assumption: employee only about $244,043 at 4% or $162,695 at 6%; with 50% employer match about $162,695 at 4% or $108,464 at 6%; with 100% employer match about $122,022 at 4% or $81,348 at 6%.
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,889---
Tetra Tech Inc. Flexible Spending Plan-1,759---
Tetra Tech Inc. Group Life, Disability and Vision Plan-3,441---
200468,789$313,283,800$35,939,749$4,089iApproximate average salary by contribution assumption: employee only about $102,229 at 4% or $68,153 at 6%; with 50% employer match about $68,153 at 4% or $45,435 at 6%; with 100% employer match about $51,115 at 4% or $34,076 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-8,789$309,712,647$35,615,143$4,052iApproximate average salary by contribution assumption: employee only about $101,306 at 4% or $67,537 at 6%; with 50% employer match about $67,537 at 4% or $45,025 at 6%; with 100% employer match about $50,653 at 4% or $33,769 at 6%.
M & I MANAGEMENT & INTEGRATION 401K PLAN-30$3,571,153$324,606$10,820iApproximate average salary by contribution assumption: employee only about $270,505 at 4% or $180,337 at 6%; with 50% employer match about $180,337 at 4% or $120,224 at 6%; with 100% employer match about $135,253 at 4% or $90,168 at 6%.
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,851---
Tetra Tech Inc. Group Life, Disability and Vision Plan-7,889---
Tetra Tech Inc. Flexible Spending Plan-1,756---
Tetra Tech Inc. Group Benefit Plan-4,794---
200368,109$261,991,009$40,352,395$4,976iApproximate average salary by contribution assumption: employee only about $124,406 at 4% or $82,937 at 6%; with 50% employer match about $82,937 at 4% or $55,292 at 6%; with 100% employer match about $62,203 at 4% or $41,469 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-8,109$258,726,396$40,027,124$4,936iApproximate average salary by contribution assumption: employee only about $123,403 at 4% or $82,269 at 6%; with 50% employer match about $82,269 at 4% or $54,846 at 6%; with 100% employer match about $61,702 at 4% or $41,134 at 6%.
M & I MANAGEMENT & INTEGRATION 401K PLAN-36$3,264,613$325,271$9,035iApproximate average salary by contribution assumption: employee only about $225,883 at 4% or $150,588 at 6%; with 50% employer match about $150,588 at 4% or $100,392 at 6%; with 100% employer match about $112,941 at 4% or $75,294 at 6%.
Tetra Tech Inc. Group Benefit Plan-3,441---
Tetra Tech Inc. Fully Insured Hmo Benefit Plan-2,190---
Tetra Tech Inc. Flexible Spending Plan-1,103---
Tetra Tech Inc. Group Life, Disability and Vision Plan-6,460---
200267,274$2,407,851$288,174$40iApproximate average salary by contribution assumption: employee only about $990 at 4% or $660 at 6%; with 50% employer match about $660 at 4% or $440 at 6%; with 100% employer match about $495 at 4% or $330 at 6%.
M & I MANAGEMENT & INTEGRATION 401K PLAN-38$2,311,324$288,174$7,584iApproximate average salary by contribution assumption: employee only about $189,588 at 4% or $126,392 at 6%; with 50% employer match about $126,392 at 4% or $84,261 at 6%; with 100% employer match about $94,794 at 4% or $63,196 at 6%.
Tetra Tech Inc. and Subsidiaries Retirement Plan-7,274---
Tetra Tech Inc. Flexible Spending Plan-1,054---
Tetra Tech Inc. Group Life, Disability and Vision Plan-4,304---
Tetra Tech Inc. Group Benefit Plan-4,626---
200156,125$129,458,042$22,609,730$3,691iApproximate average salary by contribution assumption: employee only about $92,285 at 4% or $61,523 at 6%; with 50% employer match about $61,523 at 4% or $41,015 at 6%; with 100% employer match about $46,142 at 4% or $30,762 at 6%.
200045,750$2,367,512$370,384$64iApproximate average salary by contribution assumption: employee only about $1,610 at 4% or $1,074 at 6%; with 50% employer match about $1,074 at 4% or $716 at 6%; with 100% employer match about $805 at 4% or $537 at 6%.
199914,398$129,166,058$20,534,164$4,669iApproximate average salary by contribution assumption: employee only about $116,724 at 4% or $77,816 at 6%; with 50% employer match about $77,816 at 4% or $51,878 at 6%; with 100% employer match about $58,362 at 4% or $38,908 at 6%.