Aspen Aerogels (ASPN) 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 Aspen Aerogels (ASPN) over the past year, gaining 17.6% versus a loss of 32.3%. Over five years, MNTK leads with a -77.4% price change compared with -88.6% for ASPN. Aspen Aerogels is the larger company by market cap ($467.2 million vs $390.0 million), about 1.2 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 | ASPN | MNTK |
|---|---|---|
| Share price | $5.63 | $2.74 |
| Market cap | $467.23M | $390.01M |
| 1-day change | -2.60% | +3.01% |
| YTD return | +98.94% | +64.07% |
| 1-year return | -32.25% | +17.60% |
| 5-year return | -88.63% | -77.39% |
| P/E ratio (TTM) | — | 45.67 |
| Forward P/E | — | 8.93 |
| EPS (TTM) | $-1.53 | $0.06 |
| Dividend yield | 0.00% | 0.00% |
| Annual dividend | $0.00 | $0.00 |
| 52-week high | $9.35 | $3.28 |
| 52-week low | $2.30 | $1.07 |
| Distance from 52-week high | -39.77% | -16.46% |
| Analyst consensus | buy | none |
| Avg. price target upside | +37.66% | -37.96% |
| Average volume | 1.14M | 429.28K |
| Shares outstanding | 82.99M | 142.34M |
| Employees | 854 | 189 |
| Sector | Consumer Discretionary | Utilities |
| Industry | RETAIL: Building Materials | 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 ASPN by 49.8 percentage points over the past year.
- The two companies sit in different sectors: Aspen Aerogels in Consumer Discretionary and Montauk Renewables in Utilities.
About Aspen Aerogels
ASPN stock →Aspen Aerogels, Inc., an aerogel technology company, designs, develops, manufactures, and sells aerogel materials primarily for use in the energy industrial, sustainable insulation materials, and electric vehicle (EV) markets in the United States, Canada, Asia, Europe, and Latin America. It operates through two segments: Thermal Barrier and Energy Industrial.
Consumer Discretionary · RETAIL: Building Materials · 854 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
ASPN vs MNTK FAQ
Which is bigger, Aspen Aerogels or Montauk Renewables?
Aspen Aerogels (ASPN) is larger, with a market capitalization of $467.23M compared with $390.01M for Montauk Renewables (MNTK).
Which stock has performed better over the past year, ASPN or MNTK?
MNTK returned +17.60% over the past 12 months, compared with -32.25% for ASPN (price return, excluding dividends). Past performance does not predict future results.
Are Aspen Aerogels and Montauk Renewables in the same industry?
No. Aspen Aerogels is in the Consumer Discretionary sector, while Montauk Renewables is in Utilities.