ASP Isotopes (ASPI) vs Montauk Renewables (MNTK)
Head-to-head comparison of performance, valuation, growth, profitability and dividends. Prices delayed 15 minutes; data as of Oct 9, 2026.
Summary
Montauk Renewables (MNTK) has outperformed ASP Isotopes (ASPI) over the past year, gaining 17.6% versus a loss of 68.9%. ASP Isotopes is the larger company by market cap ($433.9 million vs $390.0 million), about 1.1 times the size.
Summary generated from market data by MetaCap's automated system. Methodology
Relative performance
Percent change in share price from the first common trading day shown; excludes dividends.
Head-to-head
| Metric | ASPI | MNTK |
|---|---|---|
| Share price | $2.83 | $2.74 |
| Market cap | $433.87M | $390.01M |
| 1-day change | -1.05% | +3.01% |
| YTD return | -47.10% | +64.07% |
| 1-year return | -68.94% | +17.60% |
| 5-year return | — | -77.39% |
| P/E ratio (TTM) | — | 45.67 |
| Forward P/E | — | 8.93 |
| EPS (TTM) | $-1.49 | $0.06 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| 52-week high | $14.49 | $3.28 |
| 52-week low | $2.51 | $1.07 |
| Distance from 52-week high | -80.47% | -16.46% |
| Analyst consensus | none | none |
| Avg. price target upside | +359.36% | -37.96% |
| Average volume | 3.99M | 429.28K |
| Shares outstanding | 153.31M | 142.34M |
| Employees | 271 | 189 |
| Sector | Industrials | Utilities |
| Industry | Major Chemicals | Natural Gas Distribution |
Highlighted cells mark the higher value for growth, returns, margins and yield, and the lower value for P/E ratios. Highlighting is a mechanical comparison, not a recommendation.
Key differences
- MNTK has outperformed ASPI by 86.5 percentage points over the past year.
- The two companies sit in different sectors: ASP Isotopes in Industrials and Montauk Renewables in Utilities.
About ASP Isotopes
ASPI stock →ASP Isotopes Inc., a development stage advanced materials company, engages in the production, distribution, marketing, and sale of isotopes in South Africa,Hong Kong, and United States. It operates in two segments, Nuclear Fuels, and Specialist Isotopes and Related Services.
Industrials · Major Chemicals · 271 employees
About Montauk Renewables
MNTK stock →Montauk Renewables, Inc., a renewable energy company, engages in recovery and processing of biogas from landfills and other non-fossil fuel sources. It operates in two segments, Renewable Natural Gas and Renewable Electricity Generation.
Utilities · Natural Gas Distribution · 189 employees
ASPI vs MNTK FAQ
Which is bigger, ASP Isotopes or Montauk Renewables?
ASP Isotopes (ASPI) is larger, with a market capitalization of $433.87M compared with $390.01M for Montauk Renewables (MNTK).
Which stock has performed better over the past year, ASPI or MNTK?
MNTK returned +17.60% over the past 12 months, compared with -68.94% for ASPI (price return, excluding dividends). Past performance does not predict future results.
Are ASP Isotopes and Montauk Renewables in the same industry?
No. ASP Isotopes is in the Industrials sector, while Montauk Renewables is in Utilities.