We are live on ! Find out more

Pollution & Treatment Controls
Stocks Ranked by
Market Capitalization

Name Market cap Price Price
change %
VLTO icon
1
Veralto
VLTO
$27B
$27B $111.10 6.77%
ZWS icon
2
Zurn Elkay Water Solutions
ZWS
$7.4B
$7.4B $44.80 0.16%
CECO icon
3
Ceco Environmental
CECO
$2.96B
$2.96B $50.50 7.68%
PCT icon
4
PureCycle Technologies
PCT
$675M
$675M $3.36 0.9%
CDZI icon
5
Cadiz
CDZI
$387M
$387M $4.55 3.4%
ADUR icon
6
Aduro Clean Technologies
ADUR
$363M
$363M $10.16 1.07%
ERII icon
7
Energy Recovery
ERII
$355M
$355M $6.96 2.25%
ARQ icon
8
Arq
ARQ
$77.3M
$77.3M $1.77 0%
FTEK icon
9
Fuel Tech
FTEK
$45.3M
$45.3M $1.45 2.03%
SCWO icon
10
374Water
SCWO
$43.6M
$43.6M $2.46 1.2%
CLIR icon
11
ClearSign Technologies
CLIR
$15.7M
$15.7M $2.31 6.1%
TOMZ icon
12
TOMI Environmental Solutions
TOMZ
$15.7M
$15.7M $1.93 13.5%
CLWT icon
13
Euro Tech Holdings
CLWT
$9.9M
$9.9M $1.34 1.47%
LIQT icon
14
LiqTech
LIQT
$9.9M
$9.9M $0.3010 6.81%
RAIN icon
15
Rain Enhancement Technologies
RAIN
$6.17M
$6.17M $0.5273 12%

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 15 Pollution & Treatment Controls industry stocks tracked by Wall St. Rank, worth a combined $39.4B.

The largest by market cap are Veralto (VLTO) at $27B, Zurn Elkay Water Solutions (ZWS) at $7.4B and Ceco Environmental (CECO) at $2.96B.

Among institutional investors, Ceco Environmental (CECO) drew the most net new fund positions in Q2 2026: 106 funds opened new positions, taking total fund holders up 79 (30%) quarter-over-quarter.

Market caps and prices updated daily; fund activity based on aggregated SEC 13F filings for Q2 2026.