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Tetra Tech vs Willdan Group: TTEK and WLDN compared
Tetra Tech is the larger company: $1.3B of revenue in its latest quarter (Q3 FY26) against $215M for Willdan Group (Q3 2026). Willdan Group is growing faster (+18% against -4% a year earlier). Tetra Tech is more profitable, with an operating margin of 12.1% against 7.6%.
Where the money goes: TTEK and WLDN
Tetra Tech (TTEK) · Q3 FY26
Tetra Tech, Q3 FY26: revenue $1.3B (-4% year over year), operating margin 12.1%, net earnings $110M, operating cash flow $229M. The chart follows the revenue to costs, profit and cash.
Willdan Group (WLDN) · Q3 2026
Willdan Group, Q3 2026: revenue $215M (+18% year over year), operating margin 7.6%, net earnings $11.9M, operating cash flow $13.4M. The chart follows the revenue to costs, profit and cash.
| Tetra Tech (TTEK) | Willdan Group (WLDN) | |
|---|---|---|
| Latest quarter | Q3 FY26 | Q3 2026 |
| Revenue | $1.3B | $215M |
| Revenue growth, Y/Y | -4% | +18% |
| Gross margin | 18.6% | 38.4% |
| Operating margin | 12.1% | 7.6% |
| Net earnings | $110M | $11.9M |
| Net margin | 8.4% | 5.5% |
| Operating cash flow | $229M | $13.4M |
| Free cash flow | $225M | $11.9M |
| Market value | $10.5B | $1.2B |
| P/E | 23.9× | 17.7× |
| Analysts’ mean target | $40.17 | $137.50 |
Where the revenue comes from
Willdan Group
- Energy: $185M (86%)
- Engineering and Consulting: $29.7M (14%)
Questions
Which is bigger, Tetra Tech or Willdan Group?
Tetra Tech is the larger company: $1.3B of revenue in its latest quarter (Q3 FY26) against $215M for Willdan Group (Q3 2026).
Is Tetra Tech or Willdan Group growing faster?
Willdan Group is growing faster (+18% against -4% a year earlier).
Which is more profitable, Tetra Tech or Willdan Group?
Tetra Tech is more profitable, with an operating margin of 12.1% against 7.6%.
More: Tetra Tech earnings · how Tetra Tech makes money · Willdan Group earnings · how Willdan Group makes money
From the companies' latest 10-Q, 10-K or earnings release (10-Q filed Jul 31, 2026; 10-Q filed Nov 6, 2026). Fiscal quarters can end on different dates. Not investment advice.