Tetra Tech, Inc. 401(k) Plan: Login, Facts & Contact Information
Tetra Tech, Inc. 401(k) Login
3,673 former Tetra Tech, Inc. employees still have money in this plan.
Retirement plan providers can change. This information is from the plan's 2024 filing.
Tetra Tech, Inc. 401(k) Plan Facts
Source: Form 5500 for plan year 2024 (Oct 1, 2024 – Sep 30, 2025), filed Jul 13, 2026. Public filing with the U.S. Department of Labor.
Money in and out in plan year 2024
- $119.8 million went into the plan in contributions, $32.8 million of it from the employer (27%).
- $199.1 million was paid out to participants.
- Investment and other income added $259.0 million.
- Administrative expenses were $1.34 million, about $123 per account.
How the Tetra Tech, Inc. 401(k) changed, 2019–2024
| Plan year | Participants | Plan assets | Employer contributions | Benefits paid |
|---|---|---|---|---|
| 2019 | 11,932 | $1.30 billion | $32.4 million | $89.0 million |
| 2020 | 11,932 | $1.58 billion | $23.2 million | $105.0 million |
| 2021 | 13,725 | $1.35 billion | $16.9 million | $108.5 million |
| 2022 | 13,927 | $1.53 billion | $28.8 million | $115.8 million |
| 2023 | 14,697 | $1.98 billion | $32.6 million | $157.3 million |
| 2024 | 15,680 | $2.16 billion | $32.8 million | $199.1 million |
Tetra Tech, Inc. 401(k) Contact Information
Questions about the Tetra Tech, Inc. 401(k)
Does Tetra Tech, Inc contribute to the 401(k)?
Yes. The plan reports an employer contribution arrangement. In plan year 2024 the employer contributed $32.8 million, 27% of all contributions.
Does the Tetra Tech, Inc 401(k) have automatic enrollment?
No. The plan does not report automatic enrollment; employees enroll themselves.
How many people are in the Tetra Tech, Inc 401(k) plan?
15,680 participants at the start of plan year 2024, 10,454 of them active employees, and 3,673 former employees who still had money in the plan.
What is the average 401(k) balance at Tetra Tech, Inc?
About $198,347 per account: $2.16 billion in plan assets across 10,892 accounts with a balance at the end of plan year 2024.
Who manages the Tetra Tech, Inc 401(k) accounts?
Principal (listed on the filing as PRINCIPAL LIFE INSURANCE COMPANY) is the plan's recordkeeper, which is where participants log in to see their balance.
I no longer work at Tetra Tech, Inc. How do I access my 401(k)?
Your account stays with Principal after you leave, so you can log in with the same credentials. If your balance was small, the plan may have rolled it into an IRA in your name. If you can't find it, Beagle can locate it for you.