Micro Cap
Pollution & Treatment Controls
Stocks Ranked by
Market Capitalization
| Name | Market cap | Price |
Price change % |
|
|---|---|---|---|---|
1
Arq
ARQ
$77.3M
| $77.3M | $1.77 | 0% |
|
2
Fuel Tech
FTEK
$45.3M
| $45.3M | $1.45 | 2.03% |
|
3
374Water
SCWO
$43.6M
| $43.6M | $2.46 | 1.2% |
|
4
ClearSign Technologies
CLIR
$15.7M
| $15.7M | $2.31 | 6.1% |
|
5
TOMI Environmental Solutions
TOMZ
$15.7M
| $15.7M | $1.93 | 13.5% |
|
6
Euro Tech Holdings
CLWT
$9.9M
| $9.9M | $1.34 | 1.47% |
|
7
LiqTech
LIQT
$9.9M
| $9.9M | $0.3010 | 6.81% |
|
8
Rain Enhancement Technologies
RAIN
$6.17M
| $6.17M | $0.5273 | 12% |
|
Micro Cap Pollution & Treatment Controls Stocks at a Glance
Pollution and treatment control companies build filtration, emissions-control, waste-treatment, and recycling equipment. Environmental regulation drives demand — tightening standards create replacement and upgrade cycles largely independent of the economy.
There are 8 micro cap Pollution & Treatment Controls stocks — companies in the Pollution & Treatment Controls industry with a market cap under $250M — worth a combined $224M.
The largest by market cap are Arq (ARQ) at $77.3M, Fuel Tech (FTEK) at $45.3M and 374Water (SCWO) at $43.6M.
Among institutional investors, LiqTech (LIQT) drew the most net new fund positions in Q2 2026: 13 funds opened new positions, taking total fund holders up 11 (69%) quarter-over-quarter.
- Combined market cap: $224M across 8 stocks.
- Micro Cap: market cap under $250M.
- Largest constituent: Arq (ARQ), $77.3M market cap.
- Most net new fund positions in Q2 2026: LiqTech (LIQT), +11 holders.
Market caps and prices updated daily; fund activity based on aggregated SEC 13F filings for Q2 2026.