Micro Cap
Pollution & Treatment Controls
Stocks Ranked by
Market Capitalization
| Name | Market cap | Price |
Price change % |
|
|---|---|---|---|---|
1
Arq
ARQ
$86.3M
| $86.3M | $2.01 | 1.01% |
|
2
Fuel Tech
FTEK
$44.9M
| $44.9M | $1.44 | 5.26% |
|
3
374Water
SCWO
$39.7M
| $39.7M | $2.27 | 3.18% |
|
4
ClearSign Technologies
CLIR
$24.3M
| $24.3M | $3.85 | 3.27% |
|
5
LiqTech
LIQT
$21.4M
| $21.4M | $0.6500 | 4.4% |
|
|
RAIN
6
Rain Enhancement Technologies
RAIN
$13.9M
| $13.9M | $1.34 | 2.29% |
|
7
TOMI Environmental Solutions
TOMZ
$13.1M
| $13.1M | $1.70 | 1.8% |
|
8
Euro Tech Holdings
CLWT
$11.4M
| $11.4M | $1.54 | 2.53% |
|
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 $255M.
The largest by market cap are Arq (ARQ) at $86.3M, Fuel Tech (FTEK) at $44.9M and 374Water (SCWO) at $39.7M.
Among institutional investors, Rain Enhancement Technologies (RAIN) drew the most net new fund positions in Q1 2026: 8 funds opened new positions, taking total fund holders up 4 (31%) quarter-over-quarter.
- Combined market cap: $255M across 8 stocks.
- Micro Cap: market cap under $250M.
- Largest constituent: Arq (ARQ), $86.3M market cap.
- Most net new fund positions in Q1 2026: Rain Enhancement Technologies (RAIN), +4 holders.
Market caps and prices updated daily; fund activity based on aggregated SEC 13F filings for Q1 2026.