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Clean Energy Fuels vs Montauk Renewables: CLNE and MNTK compared
Clean Energy Fuels is the larger company: $112M of revenue in its latest quarter (Q3 2026) against $54.0M for Montauk Renewables (Q2 2026). Montauk Renewables is growing faster (+20% against +6% a year earlier). Clean Energy Fuels is more profitable, with an operating margin of 0.9% against -0.1%.
Where the money goes: CLNE and MNTK
Clean Energy Fuels (CLNE) · Q3 2026
Clean Energy Fuels, Q3 2026: revenue $112M (+6% year over year), operating margin 0.9%, net loss $1.9M, operating cash flow $36.2M. The chart follows the revenue to costs, profit and cash.
Montauk Renewables (MNTK) · Q2 2026
Montauk Renewables, Q2 2026: revenue $54.0M (+20% year over year), operating margin -0.1%, net earnings $226K, operating cash flow $14.6M. The chart follows the revenue to costs, profit and cash.
| Clean Energy Fuels (CLNE) | Montauk Renewables (MNTK) | |
|---|---|---|
| Latest quarter | Q3 2026 | Q2 2026 |
| Revenue | $112M | $54.0M |
| Revenue growth, Y/Y | +6% | +20% |
| Operating margin | 0.9% | -0.1% |
| Net earnings | −$1.9M | $226K |
| Net margin | -1.7% | 0.4% |
| Operating cash flow | $36.2M | $14.6M |
| Free cash flow | $28.4M | — |
Where the revenue comes from
Clean Energy Fuels
- Product: $96.3M (86%)
- Service: $15.6M (14%)
- Other services: $476K (0%)
Montauk Renewables
- Natural Gas Environmental Attributes: $44.6M (83%)
- Natural Gas Commodity: $4.8M (9%)
- Electric Commodity: $2.6M (5%)
- Electric Environmental Attributes: $2.0M (4%)
Questions
Which is bigger, Clean Energy Fuels or Montauk Renewables?
Clean Energy Fuels is the larger company: $112M of revenue in its latest quarter (Q3 2026) against $54.0M for Montauk Renewables (Q2 2026).
Is Clean Energy Fuels or Montauk Renewables growing faster?
Montauk Renewables is growing faster (+20% against +6% a year earlier).
Which is more profitable, Clean Energy Fuels or Montauk Renewables?
Clean Energy Fuels is more profitable, with an operating margin of 0.9% against -0.1%.
More: Clean Energy Fuels earnings · how Clean Energy Fuels makes money · Montauk Renewables earnings · how Montauk Renewables makes money
From the companies' latest 10-Q, 10-K or earnings release (10-Q filed Nov 5, 2026; 10-Q filed Aug 5, 2026). Fiscal quarters can end on different dates. Not investment advice.