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Arcosa vs Proto Labs: ACA and PRLB compared
Arcosa is the larger company: $659M of revenue in its latest quarter (Q2 2026) against $154M for Proto Labs (Q3 2026). Proto Labs is growing faster (+14% against +2% a year earlier). Arcosa is more profitable, with an operating margin of 12.8% against 9.4%.
Where the money goes: ACA and PRLB
Arcosa (ACA) · Q2 2026
Arcosa, Q2 2026: revenue $659M (+2% year over year), operating margin 12.8%, net earnings $328M, operating cash flow −$11.2M. The chart follows the revenue to costs, profit and cash.
Proto Labs (PRLB) · Q3 2026
Proto Labs, Q3 2026: revenue $154M (+14% year over year), operating margin 9.4%, net earnings $11.8M, operating cash flow $22.8M. The chart follows the revenue to costs, profit and cash.
| Arcosa (ACA) | Proto Labs (PRLB) | |
|---|---|---|
| Latest quarter | Q2 2026 | Q3 2026 |
| Revenue | $659M | $154M |
| Revenue growth, Y/Y | +2% | +14% |
| Gross margin | 23.6% | 44.5% |
| Operating margin | 12.8% | 9.4% |
| Net earnings | $328M | $11.8M |
| Net margin | 49.9% | 7.6% |
| Operating cash flow | −$11.2M | $22.8M |
| Free cash flow | — | $17.0M |
| Market value | $7.3B | — |
| P/E | 36.8× | — |
| Analysts’ mean target | $150.00 | — |
Where the revenue comes from
Proto Labs
- CNC Machining: $73.4M (48%)
- Injection Molding: $53.7M (35%)
- 3D Printing: $22.4M (14%)
- Sheet Metal: $4.1M (3%)
Questions
Which is bigger, Arcosa or Proto Labs?
Arcosa is the larger company: $659M of revenue in its latest quarter (Q2 2026) against $154M for Proto Labs (Q3 2026).
Is Arcosa or Proto Labs growing faster?
Proto Labs is growing faster (+14% against +2% a year earlier).
Which is more profitable, Arcosa or Proto Labs?
Arcosa is more profitable, with an operating margin of 12.8% against 9.4%.
More: Arcosa earnings · how Arcosa makes money · Proto Labs earnings · how Proto Labs makes money
From the companies' latest 10-Q, 10-K or earnings release (10-Q filed Aug 5, 2026; 10-Q filed Oct 29, 2026). Fiscal quarters can end on different dates. Not investment advice.