TETRA TECH, INC.
TETRA TECH, INC. is a Public Limited Company registered in United States under 601077148, and its current status with California Secretary of State — bizfile Online is active. The company was incorporated on 25 March 1988 and lists its registered address as Pasadena, United States. 3 shareholders are on record for TETRA TECH, INC., and since every one of them is a company rather than an individual, this particular filing does not on its own establish an ultimate beneficial owner (UBO) — identifying one would mean tracing the ownership of each shareholding company in turn. This profile is sourced directly from California Secretary of State — bizfile Online and was last updated on 22 September 2026.
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Shareholders
3
Three shareholders are currently on record for TETRA TECH, INC., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing.
The largest of these is Vanguard Group Inc, holding 16.4% — the largest recorded stake — followed by Pictet Asset Management Holding SA at 7.1%; the remaining 1 shareholder shown holds smaller stakes.
Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
| Shareholder | Type | Holding | Source Document |
|---|---|---|---|
| Vanguard Group Inc | 16.4% | California Secretary of State — bizfile Online | |
| Pictet Asset Management Holding SA | 7.1% | California Secretary of State — bizfile Online | |
| Geode Capital Management, LLC | 3.2% | California Secretary of State — bizfile Online |
Officers
5
The Director of TETRA TECH, INC. on record is GARY BIRKENBEUEL; 5 officers are shown here, filed with California Secretary of State — bizfile Online.
The register reports 52 officers in total, including past appointments, though only the 5 most relevant records are shown here.
Management authority at TETRA TECH, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
The source filing doesn't specify representation authority — whether officers can act individually or must sign jointly to bind the company — so that detail isn't available here.
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Frequently Asked Questions
Who owns TETRA TECH, INC.?
Three shareholders are currently on record for TETRA TECH, INC., reflecting the stock ledger maintained under state corporate law (e.g. §219 of the Delaware General Corporation Law) rather than a public filing. The largest of these is Vanguard Group Inc, holding 16.4% — the largest recorded stake — followed by Pictet Asset Management Holding SA at 7.1%; the remaining 1 shareholder shown holds smaller stakes. Because every shareholder shown is a company rather than an individual, the ownership chain continues above this level, and no beneficial owner can be established from this filing alone.
Who is TETRA TECH, INC.'s UBO (Ultimate Beneficial Owner)?
Every shareholder recorded for TETRA TECH, INC. is itself a company rather than a natural person, so no Ultimate Beneficial Owner (UBO) is identified at this level; establishing one would require tracing the ownership of each shareholding company in turn.
How many shareholders does TETRA TECH, INC. have on record?
3 shareholders are shown on record for TETRA TECH, INC..
What is TETRA TECH, INC.'s company registration number?
TETRA TECH, INC.'s registration number is 601077148, filed with California Secretary of State — bizfile Online in United States. Its current status on the register is active.
Is TETRA TECH, INC. still an active company?
TETRA TECH, INC.'s status on California Secretary of State — bizfile Online is listed as active.
When was TETRA TECH, INC. incorporated?
TETRA TECH, INC. was incorporated on 25 March 1988, according to California Secretary of State — bizfile Online.
What is TETRA TECH, INC.'s registered address?
The registered address on file for TETRA TECH, INC. is Pasadena, United States.
What legal structure is TETRA TECH, INC. registered as?
TETRA TECH, INC. is registered as a Public Limited Company in United States.
Who are the officers/directors of TETRA TECH, INC.?
The Director of TETRA TECH, INC. on record is GARY BIRKENBEUEL; 5 officers are shown here, filed with California Secretary of State — bizfile Online. Management authority at TETRA TECH, INC. sits with these individuals, not with shareholders, who are covered separately and hold ownership rather than control.
Can Zavia monitor changes to TETRA TECH, INC.'s ownership over time?
This profile reflects a point-in-time snapshot from California Secretary of State — bizfile Online. Zavia's monitoring API can track changes to TETRA TECH, INC.'s registered shareholders, officers, and group structure going forward, flagging updates as they're filed rather than requiring a manual recheck.
Can I access TETRA TECH, INC.'s data through an API?
Yes. Zavia's API connects directly to official government ownership registries across 195 countries and territories, including United States, so records like TETRA TECH, INC.'s registration, shareholder, UBO, and group-structure data can be queried programmatically instead of viewed one page at a time.
Where does this company information come from, and how current is it?
This record is sourced directly from California Secretary of State — bizfile Online and was last synced on 22 September 2026.