Tetra Tech 401(k) and retirement plans

Tetra Tech, Inc., New Milford, CT. EIN 95-4148514. Annual reports 2009–2024.

Tetra Tech, Inc. has 2 active retirement plans on file. The largest is the Tetra Tech, Inc. and Subsidiaries Retirement Plan, with 14,215 participants and $2.2 billion in assets in 2024. Principal has been its recordkeeper since 2020. No traditional pension plan appears in Tetra Tech's filings since 2009.

Active plans: 2
Participants: 14,326
Plan assets: $2.2 billion
401(k) recordkeeper: Principal
Plans on file: 3
Industry: Professional services

All 3 plans

Active plans first

Tetra Tech, Inc. and Subsidiaries Retirement Plan

401(k)Active

Active. The plan filed its annual report for the 2024 plan year.

Plan number: 001Employer EIN 95-4148514
Participants (2024): 14,215
Net assets (2024): $2.2 billion
Recordkeeper: PrincipalEarlier: Wells Fargo (2009–2019)
Plan administrator: Tetra Tech, Inc.
192 Candlewood Lake Road N
New Milford, CT 06776
(626) 470-2489As filed for 2024
In effect since: March 8, 1988

Year by year, 2009 to 2024

Plan year	Participants	Net assets	Recordkeeper
2024	14,215	$2.2 billion	Principal
2023	15,895	$2.0 billion	Principal
2022	14,035	$1.5 billion	Principal
2021	13,734	$1.4 billion	Principal
2020	12,321	$1.6 billion	Principal
2019	12,321	$1.3 billion	Wells Fargo
2018	11,928	$1.2 billion	Wells Fargo
2017	10,746	$1.1 billion	Wells Fargo
2016	11,197	$1.0 billion	Wells Fargo
2015	11,341	$889 million	Wells Fargo
2014	10,716	$789 million	Wells Fargo
2013	10,808	$799 million	Wells Fargo
2012	11,004	$725 million	Wells Fargo
2011	11,195	$624 million	Wells Fargo
2010	10,900	$511 million	Wells Fargo
2009	11,115	$503 million	Wells Fargo

Tetra Tech, Inc. Puerto Rico Retirement Plan

401(k)Active

Active. The plan filed its annual report for the 2024 plan year.

Plan number: 002Employer EIN 95-4148514
Participants (2024): 111
Net assets (2024): $1.9 million
Plan administrator: Tetra Tech, Inc.
3475 E. Foothill Boulevard
Pasadena, CA 91107
(626) 470-2489As filed for 2024
In effect since: April 15, 2019

Year by year, 2019 to 2024

Plan year	Participants	Net assets	Recordkeeper
2024	111	$1.9 million	not listed
2023	115	$1.1 million	not listed
2022	20	$562,749	not listed
2021	20	$373,403	not listed
2020	22	$333,950	not listed
2019	23	$171,756	not listed

Tetra Tech East Tennessee Technology Park Retirement Savings Plan

401(k)Stopped filing

No annual report since the 2011 plan year, and no final report on record. The plan may have been merged, renamed or re-filed under another number; ask the plan administrator below.

Plan number: 003Employer EIN 95-4148514
Participants (2011): 16
Net assets (2011): $2.8 million
Plan administrator: Benefits and Investments Committee
East Tennessee Technology Park, 2010 Hwy 58S, K1580, MS7020, RM 207
Oak Ridge, TN 37831
(865) 576-9004As filed for 2011
In effect since: October 1, 1999

Earlier plan names: M & I (Management & Integration) 401(k) Plan.

Year by year, 2009 to 2011

Plan year	Participants	Net assets	Recordkeeper
2011	16	$2.8 million	not listed
2010	17	$2.9 million	not listed
2009	19	$2.7 million	not listed

If you had money in one of these plans

Call Principal (principal.com), which runs the Tetra Tech, Inc. and Subsidiaries Retirement Plan. With your Social Security number and the plan name, it can tell you whether you still have a balance and, if not, where it went.
Or call the plan administrator listed on the plan below ((626) 470-2489). That number was filed for 2024; ask for the benefits or retirement plan office.
If your plan closed, unclaimed balances usually went to an IRA in your name, to the PBGC's missing participants program, or to state unclaimed property. Here is how to check each one.
Still stuck? The Department of Labor's benefits advisers help for free: askebsa.dol.gov or 1-866-444-3272. Never pay anyone to find your own money.

What these numbers are

They come from the Form 5500 annual reports each plan files with the Department of Labor, as the plan filed them. A plan year is usually a calendar year.
Participants counts everyone in the plan at year end: current employees, former employees who still have a balance or a pension coming, and retirees or beneficiaries being paid.
The recordkeeper is the service provider whose Schedule C entry says it keeps the plan's records. Small plans do not file Schedule C, so some plans show none.
We cannot see anyone's account. Only the plan or its recordkeeper can tell you your balance.

Sources: U.S. Department of Labor, Form 5500 datasets and PBGC trusteed plans. How we read them.