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AECOM vs Tetra Tech: ACM and TTEK compared
AECOM is the larger company: $4.2B of revenue in its latest quarter (Q4 FY25) against $1.3B for Tetra Tech (Q3 FY26). AECOM is growing faster (+2% against -4% a year earlier). Tetra Tech is more profitable, with an operating margin of 12.1% against 5.7%.
Where the money goes: ACM and TTEK
AECOM (ACM) · Q4 FY25
AECOM, Q4 FY25: revenue $4.2B (+2% year over year), operating margin 5.7%, net earnings $120M, operating cash flow $196M. The chart follows the revenue to costs, profit and cash.
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.
| AECOM (ACM) | Tetra Tech (TTEK) | |
|---|---|---|
| Latest quarter | Q4 FY25 | Q3 FY26 |
| Revenue | $4.2B | $1.3B |
| Revenue growth, Y/Y | +2% | -4% |
| Gross margin | 7.9% | 18.6% |
| Operating margin | 5.7% | 12.1% |
| Net earnings | $120M | $110M |
| Net margin | 2.9% | 8.4% |
| Operating cash flow | $196M | $229M |
| Free cash flow | $134M | $225M |
| Market value | $8.6B | $10.5B |
| P/E | 20.3× | 23.9× |
| Analysts’ mean target | $83.92 | $40.17 |
Questions
Which is bigger, AECOM or Tetra Tech?
AECOM is the larger company: $4.2B of revenue in its latest quarter (Q4 FY25) against $1.3B for Tetra Tech (Q3 FY26).
Is AECOM or Tetra Tech growing faster?
AECOM is growing faster (+2% against -4% a year earlier).
Which is more profitable, AECOM or Tetra Tech?
Tetra Tech is more profitable, with an operating margin of 12.1% against 5.7%.
More: AECOM earnings · how AECOM makes money · Tetra Tech earnings · how Tetra Tech makes money
From the companies' latest 10-Q, 10-K or earnings release (10-K filed Nov 19, 2025; 10-Q filed Jul 31, 2026). Fiscal quarters can end on different dates. Not investment advice.