20-quarter listed-company comparison

Pollution & Treatment Controls Stocks

Pollution & Treatment Controls: CECO Environmental Corp. owns the largest revenue base; CleanCore Solutions, Inc. has the fastest current growth.

01 · the industry itself · before any single company

How has Pollution & Treatment Controls moved against S&P 500?

The line below covers up to 5.2 years and opens on the 5Y view; the buttons cut it shorter. Over the most recent two of them this industry is 10% behind S&P 500. Earnings across its companies grew 18% on average over the last four reported quarters.

BASING · +-1 joined~Moving with the index2 of 6 companies ahead of S&P 500 by 5% or more over three months

RS — · 4/6 >200d (+2) · 2/6 lead (−1) · EPS 3/6↑

Pollution & Treatment Controls, equal-weighted, based at 200 S&P 500, same base, same start trailing 12-month earnings per share rising falling

Both lines start at 200 in the same week, so the distance between them is the whole story: the industry line is an equal-weighted index of its 6 companies. The bars underneath are trailing 12-month earnings per share, one bar per reported quarter, each member rebased to 100 at the start and the industry taking the median — so a price line pulling away from flat bars is a re-rating, not earnings. A bar turns red when that figure is lower than the quarter before. Rules are fixed and applied identically everywhere on this site: ahead by 5% or more over three months, or behind by 20% or more over a year while earnings grew 20% or more. Hover any point to read both values and the gap. This is a description of what the numbers did, not advice.

02 · sector relative strength, before individual stocks

Is Pollution & Treatment Controls outperforming S&P 500?

Pollution & Treatment Controls has underperformed S&P 500 by 16.3% over the last 52 weeks. Over 13 weeks the gap is a lead of 8.6%. 2 of 7 covered companies currently beat the S&P 500 on Mansfield relative strength, so leadership inside the sector is selective. Aduro Clean Technologies Inc. is the strongest against the sector itself at +5.7%.

+8.6%Sector vs S&P 500 · 13 weeks

-16.3%Sector vs S&P 500 · 52 weeks

2/7Stocks leading S&P 500

1/7Stocks leading sector

Sector metric: — as of latest available · unclassified · direction unavailable.

The central tension: the companies with the most scale are not necessarily the companies creating the most change.

Start with scale. Then earnings trajectory. Then business quality. Only after those three agree should price leadership carry much weight.

Bottom line

Pollution & Treatment Controls has underperformed S&P 500 by 16.3% over 52 weeks and 8.6% over 13 weeks. 2 of 7 covered companies beat the S&P 500 on Mansfield relative strength, while 1 of 7 beat the sector itself. CECO Environmental Corp. leads with revenue of $804 million, based on 4 of 7 comparable companies through Mar 2026.

Companies

complete canonical membership

Combined market value

$39.0B

Veralto Corporation

Revenue growing

2/3

positive TTM year-on-year growth

Beating S&P 500

2/7

positive Mansfield relative strength

Comparing 4 of 7

03 · research priority, made explicit

4-Factor Sector Score

An additive sector-relative research score. The four displayed point contributions always equal the total: Growth & earnings (35), Capital efficiency (25), Valuation (20), and Relative strength (20). Missing or stale evidence is absorbed inside the affected factor, never applied as a hidden adjustment.

Growth & earnings · 35%Capital efficiency · 25%Valuation · 20%Relative strength · 20%

Zurn Elkay Water Solutions Corporation has the strongest current balance of earnings trajectory, business quality, valuation and price confirmation, with 52.5% evidence confidence.

How this score is built, and what the marks mean

Missing observations are not scored as bad. Their missing weight lowers confidence and pulls the final score toward neutral. PEG is not shown when the ratio cannot mean anything: the company must be making a profit, its price-to-earnings must be positive, and its three-year earnings growth must fall between 5% and 60%. Dividing a price multiple by a loss, or by growth measured off a tiny base, produces a number that looks precise and tells you nothing. Under relative strength, one mark per week shows the last 12 weeks: a mark is filled where the company led S&P 500 by 5% or more over the 13 weeks ending that week, which is the same test used everywhere on this site. Price stage places the company on the same six-step curve the sector itself is placed on — basing, turning, breaking out, leader, fading, asleep — read from how many weeks running it has led S&P 500 and whether that lead is widening or shrinking. It describes where the PRICE stands, not the earnings trajectory and not a recommendation, and it is left blank for a company whose weekly history is too short or too stale to read.

Company	Score	Price stage	Growth & earnings/35	Capital efficiency/25	Valuation/20	Relative strength/20
1Zurn Elkay Water Solutions CorporationZWS	57.6/100Thin evidence · provisional53% evidence	ASLEEP	21.4/35 Revenue — · PAT — · OPM change 2.7 pp 39% evidence	17.0/25 ROCE 6.3% · OPM 19% 76% evidence	10.0/20 P/E 31.2× · PEG — 0% evidence	9.2/20 RS sector -2.6% · RS bench 0% · 1Y 20.4%0 of 12 weeks ahead 100% evidence
Exact sum: 21.4 + 17 + 10 + 9.2 = 57.6 · Decision use: Fill the missing evidence before acting; the ranking is deliberately pulled toward neutral.
2Veralto CorporationVLTO	53.7/100Thin evidence · provisional50% evidence	TURNING	17.3/35 Revenue — · PAT — · OPM change -0.4 pp 32% evidence	16.8/25 ROCE 5.1% · OPM 23.8% 76% evidence	10.0/20 P/E 23.4× · PEG — 0% evidence	9.6/20 RS sector -11.9% · RS bench -10.1% · 1Y -10.4%1 of 12 weeks ahead 100% evidence
Exact sum: 17.3 + 16.8 + 10 + 9.6 = 53.7 · Decision use: Fill the missing evidence before acting; the ranking is deliberately pulled toward neutral.
3CECO Environmental Corp.CECO	42.6/100Thin evidence · provisional53% evidence	FADING	14.1/35 Revenue 31.8% · PAT -65.3% · OPM change -34.1 pp 53% evidence	11.3/25 ROCE 0.3% · OPM 0.9% 57% evidence	10.0/20 P/E 161× · PEG — 0% evidence	7.2/20 RS sector -3.8% · RS bench -0.8% · 1Y 60%9 of 12 weeks ahead 100% evidence
Exact sum: 14.1 + 11.3 + 10 + 7.2 = 42.6 · Decision use: Fill the missing evidence before acting; the ranking is deliberately pulled toward neutral.
4Energy Recovery, Inc.ERII	36.5/100Thin evidence · provisional52% evidence	BASING	15.2/35 Revenue -2.8% · PAT 5% · OPM change 2.7 pp 40% evidence	8.4/25 ROCE -7.5% · OPM -153.1% 57% evidence	9.4/20 P/E 26.5× · PEG 1.82 50% evidence	3.5/20 RS sector -35.5% · RS bench -34.4% · 1Y -35.7%0 of 12 weeks ahead 70% evidence
Exact sum: 15.2 + 8.4 + 9.4 + 3.5 = 36.5 · Decision use: Fill the missing evidence before acting; the ranking is deliberately pulled toward neutral.
5Aduro Clean Technologies Inc.ADUR	55.4/100Thin evidence · provisional34% evidence	TURNING	20.5/35 Revenue — · PAT — · OPM change 3610.8 pp 24% evidence	7.9/25 ROCE -36.3% · OPM — 46% evidence	10.0/20 P/E — · PEG — 0% evidence	17.0/20 RS sector 5.7% · RS bench 7.5% · 1Y 35.3%10 of 12 weeks ahead 70% evidence
Exact sum: 20.5 + 7.9 + 10 + 17 = 55.4 · Decision use: Fill the missing evidence before acting; the ranking is deliberately pulled toward neutral.
6PureCycle Technologies, Inc.PCT	44.8/100Thin evidence · provisional34% evidence	ASLEEP	18.6/35 Revenue — · PAT — · OPM change 1374.7 pp 24% evidence	10.2/25 ROCE -5.6% · OPM — 46% evidence	10.0/20 P/E — · PEG — 0% evidence	6.0/20 RS sector -32.2% · RS bench -32.5% · 1Y -41.5%8 of 12 weeks ahead 70% evidence
Exact sum: 18.6 + 10.2 + 10 + 6 = 44.8 · Decision use: Fill the missing evidence before acting; the ranking is deliberately pulled toward neutral.
7CleanCore Solutions, Inc.ZONE	35.4/100Thin evidence · provisional39% evidence		14.4/35 Revenue 100% · PAT — · OPM change -3362.4 pp 40% evidence	7.0/25 ROCE -59.2% · OPM — 46% evidence	10.0/20 P/E — · PEG — 0% evidence	4.0/20 RS sector -32.5% · RS bench -42.5% · 1Y -82.6%11 of 11 weeks ahead 70% evidence
Exact sum: 14.4 + 7 + 10 + 4 = 35.4 · Decision use: Fill the missing evidence before acting; the ranking is deliberately pulled toward neutral.

04 · what price has already done

Market action

CECO Environmental Corp. has the strongest one-year price move in Pollution & Treatment Controls at +60%. Aduro Clean Technologies Inc. leads on Mansfield relative strength against the S&P 500 at +7.5%. 2 of 7 covered companies are above zero on that measure. Every line covers 314 weekly closes through 2026-08-04.

Price and relative strength

Every company, the sector's own index and S&P 500 all start level on the left edge of the window, so only the distance between the lines counts — the highest line has risen the most since then, and the chart at the top of this page is drawn the same way. It opens on one year; the buttons beside it stretch that to three or five.

05 · compare level, then change

Revenue Scale & Growth Durability

CECO Environmental Corp. has the highest Revenue among the 7 Pollution & Treatment Controls companies compared here, at $804 million. Energy Recovery, Inc. is next at $137 million. CleanCore Solutions, Inc. has the highest Revenue growth at the 100% top of the scoring scale, so level and change sit with different companies.

What the numbers say: CECO Environmental Corp. is the scale leader at $804 million, 486.9% ahead of Energy Recovery, Inc.. CleanCore Solutions, Inc.'s growth is stored at the ≥100% scoring cap from a $4 million base, with 13 reported observations in the 20-quarter window. Treat the growth leader as an acceleration candidate, not as equally proven scale.

LeaderCECO Environmental Corp. · $804 million

Gap486.9% versus #2 · Energy Recovery, Inc.

Persistence7/8 recent comparable periods

Coverage4/7 companies · 98 observations

Investor read: CECO Environmental Corp. is the scale benchmark; CleanCore Solutions, Inc. is the acceleration watch. Promote the challenger only if growth persists and converts into margin and returns.

This conclusion weakens if: CECO Environmental Corp.'s growth falls below CleanCore Solutions, Inc.'s for two consecutive comparable reports while operating margin also compresses.

Revenue is compared on a common reported-currency basis. Growth is year-on-year, so seasonality does not masquerade as progress.

Revenuelargest

1CECO Environmental Corp. CECO · older report$804M

2Energy Recovery, Inc. ERII · older report$137M

3PureCycle Technologies, Inc. PCT · older report$11M

4CleanCore Solutions, Inc. ZONE · older report$4M

Revenue growthfastest growers

1CleanCore Solutions, Inc. ZONE · older report100%

2CECO Environmental Corp. CECO · older report32%

3Energy Recovery, Inc. ERII · older report-2.8%

Revenue · company comparison

4/7 level · 3/7 change

On every company-comparison chart on this page: solid lines show level, dotted lines show change when “Both” is selected, and a missing report breaks the line rather than being invented.

All-company data · latest reported quarter

In every all-company table on this page, each figure is the company’s latest single reported quarter. The rankings above them use trailing-twelve-month or current-market values, so a company can legitimately show a different number in each.

Company	Revenue	Revenue growth	Reported
Veralto Corporation VLTO	$1.4B	6.8%	Sep 2026
Zurn Elkay Water Solutions Corporation ZWS	$433M	11%	Jun 2026
CECO Environmental Corp. CECO	$206M	16%	Mar 2026
Energy Recovery, Inc. ERII	$10M	25%	Mar 2026
PureCycle Technologies, Inc. PCT	$4M	100%	Mar 2026
CleanCore Solutions, Inc. ZONE	$1M	0.0%	Mar 2026
Aduro Clean Technologies Inc. ADUR	$0M	—	Mar 2026

Full 20-quarter history · every available company

Revenue · reported quarter history

Aduro Clean Technologies Inc. · ADUR

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023$0M

Jun 2023$0M

Sep 2023$0M

Dec 2023$0M

Mar 2024$0M

Jun 2024$0M

Sep 2024$0M

Dec 2024$0M

Mar 2025$0M

Jun 2025$0M

Sep 2025$0M

Dec 2025$0M

Mar 2026—

Jun 2026—

Sep 2026—

CECO Environmental Corp. · CECO

Dec 2021$94M

Mar 2022$92M

Jun 2022$105M

Sep 2022$108M

Dec 2022$116M

Mar 2023$113M

Jun 2023$129M

Sep 2023$149M

Dec 2023$154M

Mar 2024$126M

Jun 2024$138M

Sep 2024$136M

Dec 2024$159M

Mar 2025$177M

Jun 2025$185M

Sep 2025$198M

Dec 2025$215M

Mar 2026$206M

Jun 2026—

Sep 2026—

CleanCore Solutions, Inc. · ZONE

Dec 2021—

Mar 2022—

Jun 2022$3M

Sep 2022—

Dec 2022—

Mar 2023$1M

Jun 2023—

Sep 2023$0M

Dec 2023$0M

Mar 2024$0M

Jun 2024$1M

Sep 2024$0M

Dec 2024$0M

Mar 2025$1M

Jun 2025$1M

Sep 2025$1M

Dec 2025$1M

Mar 2026$1M

Jun 2026—

Sep 2026—

Energy Recovery, Inc. · ERII

Dec 2021$34M

Mar 2022$33M

Jun 2022$20M

Sep 2022$30M

Dec 2022$42M

Mar 2023$13M

Jun 2023$21M

Sep 2023$37M

Dec 2023$57M

Mar 2024$12M

Jun 2024$27M

Sep 2024$39M

Dec 2024$67M

Mar 2025$8M

Jun 2025$28M

Sep 2025$32M

Dec 2025$67M

Mar 2026$10M

Jun 2026—

Sep 2026—

PureCycle Technologies, Inc. · PCT

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023—

Dec 2023—

Mar 2024—

Jun 2024—

Sep 2024—

Dec 2024—

Mar 2025$2M

Jun 2025$2M

Sep 2025$2M

Dec 2025$3M

Mar 2026$4M

Jun 2026—

Sep 2026—

Veralto Corporation · VLTO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022$1.2B

Dec 2022$1.2B

Mar 2023$1.2B

Jun 2023$1.3B

Sep 2023$1.3B

Dec 2023$1.3B

Mar 2024$1.2B

Jun 2024$1.3B

Sep 2024$1.3B

Dec 2024$1.3B

Mar 2025—

Jun 2025$1.3B

Sep 2025$1.4B

Dec 2025$1.4B

Mar 2026—

Jun 2026$1.4B

Sep 2026—

Zurn Elkay Water Solutions Corporation · ZWS

Dec 2021$232M

Mar 2022$240M

Jun 2022$284M

Sep 2022$418M

Dec 2022$340M

Mar 2023$372M

Jun 2023$403M

Sep 2023$398M

Dec 2023$357M

Mar 2024$374M

Jun 2024$412M

Sep 2024$410M

Dec 2024$371M

Mar 2025$389M

Jun 2025$445M

Sep 2025$455M

Dec 2025$407M

Mar 2026$433M

Jun 2026—

Sep 2026—

Revenue growth · reported quarter history

CECO Environmental Corp. · CECO

Dec 2021—

Mar 2022—

Jun 202233%

Sep 202235%

Dec 202223%

Mar 202323%

Jun 202323%

Sep 202338%

Dec 202333%

Mar 202412%

Jun 20247.0%

Sep 2024-8.7%

Dec 20243.3%

Mar 202540%

Jun 202534%

Sep 202546%

Dec 202535%

Mar 202616%

Jun 2026—

Sep 2026—

CleanCore Solutions, Inc. · ZONE

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023—

Dec 2023—

Mar 2024-100%

Jun 2024—

Sep 2024—

Dec 2024—

Mar 2025—

Jun 20250.0%

Sep 2025—

Dec 2025—

Mar 20260.0%

Jun 2026—

Sep 2026—

Energy Recovery, Inc. · ERII

Dec 2021—

Mar 2022—

Jun 2022-4.8%

Sep 202243%

Dec 202224%

Mar 2023-61%

Jun 20235.0%

Sep 202323%

Dec 202336%

Mar 2024-7.7%

Jun 202429%

Sep 20245.4%

Dec 202418%

Mar 2025-33%

Jun 20253.7%

Sep 2025-18%

Dec 20250.0%

Mar 202625%

Jun 2026—

Sep 2026—

PureCycle Technologies, Inc. · PCT

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023—

Dec 2023—

Mar 2024—

Jun 2024—

Sep 2024—

Dec 2024—

Mar 2025—

Jun 2025—

Sep 2025—

Dec 2025—

Mar 2026100%

Jun 2026—

Sep 2026—

Veralto Corporation · VLTO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 20233.0%

Dec 20233.2%

Mar 20241.7%

Jun 20242.8%

Sep 20244.7%

Dec 20244.4%

Mar 2025—

Jun 20253.4%

Sep 20254.3%

Dec 20254.4%

Mar 2026—

Jun 20266.8%

Sep 2026—

Zurn Elkay Water Solutions Corporation · ZWS

Dec 2021—

Mar 2022—

Jun 202216%

Sep 202282%

Dec 202247%

Mar 202355%

Jun 202342%

Sep 2023-4.8%

Dec 20235.0%

Mar 20240.5%

Jun 20242.2%

Sep 20243.0%

Dec 20243.9%

Mar 20254.0%

Jun 20258.0%

Sep 202511%

Dec 20259.7%

Mar 202611%

Jun 2026—

Sep 2026—

06 · compare level, then change

Operating Economics & Margin Trend

Veralto Corporation has the highest OPM among the 7 Pollution & Treatment Controls companies compared here, at 23.8%. Zurn Elkay Water Solutions Corporation is next at 19%. Aduro Clean Technologies Inc. has the highest Margin change at +3610.8 percentage points, so level and change sit with different companies. Its OPM series carries 14 reported observations across the 20-quarter window.

What the numbers say: Veralto Corporation leads opm at 23.8%; Aduro Clean Technologies Inc. leads margin change at +3610.8 percentage points.

LeaderVeralto Corporation · 23.8%

Gap25.3% versus #2 · Zurn Elkay Water Solutions Corporation

Persistence5/8 recent comparable periods

Coverage4/7 companies · 79 observations

Investor read: Veralto Corporation sets the level benchmark; use the change leader as an inflection watch only after another comparable report confirms it.

This conclusion weakens if: The next two comparable reports reverse the current margin change signal.

Operating margin compares operating profit with revenue. Improvement is measured in percentage points, not percentage growth.

OPMhighest

1Veralto Corporation VLTO24%

2Zurn Elkay Water Solutions Corporation ZWS19%

3CECO Environmental Corp. CECO · older report0.9%

4Energy Recovery, Inc. ERII · older report-153%

Margin changefastest expanders

1Aduro Clean Technologies Inc. ADUR · older report+3,610.8 pp

2PureCycle Technologies, Inc. PCT · older report+1,374.7 pp

3Energy Recovery, Inc. ERII · older report+2.7 pp

4Zurn Elkay Water Solutions Corporation ZWS+2.7 pp

5Veralto Corporation VLTO−0.4 pp

Operating margin · company comparison

4/7 level · 7/7 change

All-company data · latest reported quarter

Company	OPM	Margin change	Reported
Veralto Corporation VLTO	24%	−0.4 pp	Sep 2026
Zurn Elkay Water Solutions Corporation ZWS	19%	+2.7 pp	Jun 2026
CECO Environmental Corp. CECO	0.9%	−34.1 pp	Mar 2026
Energy Recovery, Inc. ERII	-153%	+2.7 pp	Mar 2026
CleanCore Solutions, Inc. ZONE	-911%	−3,362.4 pp	Mar 2026
PureCycle Technologies, Inc. PCT	—	+1,374.7 pp	Mar 2026
Aduro Clean Technologies Inc. ADUR	—	+3,610.8 pp	Mar 2026

Full 20-quarter history · every available company

OPM · reported quarter history

CECO Environmental Corp. · CECO

Dec 20215.6%

Mar 20225.6%

Jun 20225.5%

Sep 20222.6%

Dec 20227.2%

Mar 20234.9%

Jun 20236.7%

Sep 20235.3%

Dec 20238.2%

Mar 20246.1%

Jun 20246.7%

Sep 20245.3%

Dec 20247.1%

Mar 202535%

Jun 20259.7%

Sep 20254.8%

Dec 20257.7%

Mar 20260.9%

Jun 2026—

Sep 2026—

CleanCore Solutions, Inc. · ZONE

Dec 2021—

Mar 2022—

Jun 2022-10%

Sep 2022—

Dec 2022—

Mar 2023-41%

Jun 2023—

Sep 2023-116%

Dec 2023-99%

Mar 2024-139%

Jun 2024-124%

Sep 2024-224%

Dec 2024-375%

Mar 2025-129%

Jun 2025-436%

Sep 2025-911%

Dec 2025—

Mar 2026—

Jun 2026—

Sep 2026—

Energy Recovery, Inc. · ERII

Dec 202118%

Mar 202225%

Jun 2022-14%

Sep 202216%

Dec 202235%

Mar 2023-61%

Jun 2023-13%

Sep 202325%

Dec 202336%

Mar 2024-90%

Jun 2024-7.4%

Sep 202418%

Dec 202438%

Mar 2025-156%

Jun 20255.3%

Sep 202511%

Dec 202547%

Mar 2026-153%

Jun 2026—

Sep 2026—

Veralto Corporation · VLTO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 202223%

Dec 202224%

Mar 202324%

Jun 202323%

Sep 202322%

Dec 202322%

Mar 202424%

Jun 202423%

Sep 202423%

Dec 202423%

Mar 2025—

Jun 202524%

Sep 202523%

Dec 202523%

Mar 2026—

Jun 202624%

Sep 2026—

Zurn Elkay Water Solutions Corporation · ZWS

Dec 20215.7%

Mar 202218%

Jun 202219%

Sep 2022-2.4%

Dec 20225.8%

Mar 202312%

Jun 202314%

Sep 202315%

Dec 20239.2%

Mar 202414%

Jun 202418%

Sep 202417%

Dec 202413%

Mar 202516%

Jun 202518%

Sep 202517%

Dec 202515%

Mar 202619%

Jun 2026—

Sep 2026—

Margin change · reported quarter history

Aduro Clean Technologies Inc. · ADUR

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023—

Dec 2023—

Mar 2024+1,209.8 pp

Jun 2024+1,384.0 pp

Sep 2024−1,790.0 pp

Dec 2024−5,217.3 pp

Mar 2025−2,889.9 pp

Jun 2025−2,654.9 pp

Sep 2025−6,591.8 pp

Dec 2025+3,610.8 pp

Mar 2026—

Jun 2026—

Sep 2026—

CECO Environmental Corp. · CECO

Dec 2021—

Mar 2022—

Jun 2022+2.8 pp

Sep 2022+3.3 pp

Dec 2022+1.6 pp

Mar 2023−0.7 pp

Jun 2023+1.2 pp

Sep 2023+2.7 pp

Dec 2023+1.0 pp

Mar 2024+1.2 pp

Jun 20240.0 pp

Sep 20240.0 pp

Dec 2024−1.1 pp

Mar 2025+28.9 pp

Jun 2025+3.0 pp

Sep 2025−0.5 pp

Dec 2025+0.6 pp

Mar 2026−34.1 pp

Jun 2026—

Sep 2026—

CleanCore Solutions, Inc. · ZONE

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023—

Dec 2023—

Mar 2024−98.6 pp

Jun 2024—

Sep 2024−108.3 pp

Dec 2024−275.3 pp

Mar 2025+10.6 pp

Jun 2025−311.5 pp

Sep 2025−686.7 pp

Dec 2025−1,563.6 pp

Mar 2026−3,362.4 pp

Jun 2026—

Sep 2026—

Energy Recovery, Inc. · ERII

Dec 2021—

Mar 2022—

Jun 2022−15.7 pp

Sep 2022+9.2 pp

Dec 2022+16.7 pp

Mar 2023−85.8 pp

Jun 2023+1.8 pp

Sep 2023+8.6 pp

Dec 2023+1.5 pp

Mar 2024−29.9 pp

Jun 2024+5.1 pp

Sep 2024−6.4 pp

Dec 2024+2.2 pp

Mar 2025−65.4 pp

Jun 2025+12.7 pp

Sep 2025−6.9 pp

Dec 2025+8.6 pp

Mar 2026+2.7 pp

Jun 2026—

Sep 2026—

PureCycle Technologies, Inc. · PCT

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023—

Dec 2023—

Mar 2024—

Jun 2024—

Sep 2024—

Dec 2024—

Mar 2025—

Jun 2025—

Sep 2025—

Dec 2025—

Mar 2026+1,374.7 pp

Jun 2026—

Sep 2026—

Veralto Corporation · VLTO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023−1.6 pp

Dec 2023−1.4 pp

Mar 2024−0.3 pp

Jun 2024+0.1 pp

Sep 2024+1.6 pp

Dec 2024+0.7 pp

Mar 2025—

Jun 2025+1.0 pp

Sep 2025−0.6 pp

Dec 2025+0.3 pp

Mar 2026—

Jun 2026−0.4 pp

Sep 2026—

Zurn Elkay Water Solutions Corporation · ZWS

Dec 2021—

Mar 2022—

Jun 2022+3.5 pp

Sep 2022−16.5 pp

Dec 2022+0.1 pp

Mar 2023−6.6 pp

Jun 2023−5.2 pp

Sep 2023+17.5 pp

Dec 2023+3.4 pp

Mar 2024+2.5 pp

Jun 2024+3.9 pp

Sep 2024+2.0 pp

Dec 2024+4.1 pp

Mar 2025+2.1 pp

Jun 20250.0 pp

Sep 2025−0.1 pp

Dec 2025+1.5 pp

Mar 2026+2.7 pp

Jun 2026—

Sep 2026—

07 · compare level, then change

Profit Scale & Acceleration

Energy Recovery, Inc. has the highest Net profit among the 7 Pollution & Treatment Controls companies compared here, at $21 million. CECO Environmental Corp. is next at $17 million. CECO Environmental Corp. has the highest Profit growth at -65.3%, so level and change sit with different companies. 5 of 7 companies report a comparable reading, the latest through Mar 2026.

What the numbers say: Energy Recovery, Inc. leads with $21 million of TTM profit, 23.5% above CECO Environmental Corp.. CECO Environmental Corp. shows -65.3% growth from a $17 million profit base. Compare the size of the base and persistence before ranking acceleration above profit scale.

LeaderEnergy Recovery, Inc. · $21 million

Gap23.5% versus #2 · CECO Environmental Corp.

Persistence5/8 recent comparable periods

Coverage5/7 companies · 117 observations

Investor read: Energy Recovery, Inc. sets the level benchmark; use the change leader as an inflection watch only after another comparable report confirms it.

This conclusion weakens if: The next two comparable reports reverse the current profit growth signal.

Net profit is the residual after operating costs, interest and tax. Growth off a loss or near-zero base is excluded from the fastest-grower rank.

Net profitlargest

1Energy Recovery, Inc. ERII · older report$21M

2CECO Environmental Corp. CECO · older report$17M

3Aduro Clean Technologies Inc. ADUR · older report$-18M

4CleanCore Solutions, Inc. ZONE · older report$-158M

5PureCycle Technologies, Inc. PCT · older report$-224M

Profit growthfastest growers

1CECO Environmental Corp. CECO · older report-65%

Net profit · company comparison

5/7 level · 1/7 change

All-company data · latest reported quarter

Company	Net profit	Profit growth	Reported
Veralto Corporation VLTO	$254M	13%	Sep 2026
Zurn Elkay Water Solutions Corporation ZWS	$59M	44%	Jun 2026
CECO Environmental Corp. CECO	$0M	-100%	Mar 2026
Aduro Clean Technologies Inc. ADUR	$-2M	—	Mar 2026
Energy Recovery, Inc. ERII	$-12M	17%	Mar 2026
PureCycle Technologies, Inc. PCT	$-33M	-467%	Mar 2026
CleanCore Solutions, Inc. ZONE	$-37M	—	Mar 2026

Full 20-quarter history · every available company

Net profit · reported quarter history

Aduro Clean Technologies Inc. · ADUR

Dec 2021$-1M

Mar 2022$-1M

Jun 2022$-1M

Sep 2022$-1M

Dec 2022$-1M

Mar 2023$-2M

Jun 2023$-2M

Sep 2023$-2M

Dec 2023$-2M

Mar 2024$-2M

Jun 2024$-2M

Sep 2024$-2M

Dec 2024$-3M

Mar 2025$-3M

Jun 2025$-4M

Sep 2025$-6M

Dec 2025$-6M

Mar 2026$-2M

Jun 2026—

Sep 2026—

CECO Environmental Corp. · CECO

Dec 2021$2M

Mar 2022$3M

Jun 2022$5M

Sep 2022$2M

Dec 2022$9M

Mar 2023$2M

Jun 2023$4M

Sep 2023$4M

Dec 2023$4M

Mar 2024$2M

Jun 2024$5M

Sep 2024$3M

Dec 2024$5M

Mar 2025$36M

Jun 2025$10M

Sep 2025$2M

Dec 2025$5M

Mar 2026$0M

Jun 2026—

Sep 2026—

CleanCore Solutions, Inc. · ZONE

Dec 2021—

Mar 2022—

Jun 2022$-1M

Sep 2022—

Dec 2022—

Mar 2023$0M

Jun 2023—

Sep 2023$0M

Dec 2023$0M

Mar 2024$-1M

Jun 2024$-1M

Sep 2024$-1M

Dec 2024$-1M

Mar 2025$-1M

Jun 2025$-4M

Sep 2025$-13M

Dec 2025$-104M

Mar 2026$-37M

Jun 2026—

Sep 2026—

Energy Recovery, Inc. · ERII

Dec 2021$5M

Mar 2022$8M

Jun 2022$-2M

Sep 2022$5M

Dec 2022$14M

Mar 2023$-6M

Jun 2023$-2M

Sep 2023$10M

Dec 2023$20M

Mar 2024$-8M

Jun 2024$-1M

Sep 2024$8M

Dec 2024$23M

Mar 2025$-10M

Jun 2025$2M

Sep 2025$4M

Dec 2025$27M

Mar 2026$-12M

Jun 2026—

Sep 2026—

PureCycle Technologies, Inc. · PCT

Dec 2021$-19M

Mar 2022$-25M

Jun 2022$-15M

Sep 2022$-35M

Dec 2022$-9M

Mar 2023$-26M

Jun 2023$-55M

Sep 2023$9M

Dec 2023$-29M

Mar 2024$-86M

Jun 2024$-48M

Sep 2024$-91M

Dec 2024$-65M

Mar 2025$9M

Jun 2025$-144M

Sep 2025$-28M

Dec 2025$-19M

Mar 2026$-33M

Jun 2026—

Sep 2026—

Veralto Corporation · VLTO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022$218M

Dec 2022$216M

Mar 2023$225M

Jun 2023$209M

Sep 2023$205M

Dec 2023$200M

Mar 2024$184M

Jun 2024$203M

Sep 2024$219M

Dec 2024$227M

Mar 2025—

Jun 2025$225M

Sep 2025$222M

Dec 2025$239M

Mar 2026—

Jun 2026$254M

Sep 2026—

Zurn Elkay Water Solutions Corporation · ZWS

Dec 2021$3M

Mar 2022$29M

Jun 2022$36M

Sep 2022$-19M

Dec 2022$10M

Mar 2023$23M

Jun 2023$33M

Sep 2023$35M

Dec 2023$14M

Mar 2024$34M

Jun 2024$45M

Sep 2024$44M

Dec 2024$36M

Mar 2025$41M

Jun 2025$50M

Sep 2025$60M

Dec 2025$42M

Mar 2026$59M

Jun 2026—

Sep 2026—

Profit growth · reported quarter history

CECO Environmental Corp. · CECO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022350%

Mar 2023-33%

Jun 2023-20%

Sep 2023100%

Dec 2023-56%

Mar 20240.0%

Jun 202425%

Sep 2024-25%

Dec 202425%

Mar 20251,700%

Jun 2025100%

Sep 2025-33%

Dec 20250.0%

Mar 2026-100%

Jun 2026—

Sep 2026—

Energy Recovery, Inc. · ERII

Dec 2021—

Mar 2022—

Jun 2022-300%

Sep 2022400%

Dec 2022180%

Mar 2023-175%

Jun 2023—

Sep 2023100%

Dec 202343%

Mar 2024—

Jun 2024—

Sep 2024-20%

Dec 202415%

Mar 2025—

Jun 2025—

Sep 2025-50%

Dec 202517%

Mar 2026—

Jun 2026—

Sep 2026—

PureCycle Technologies, Inc. · PCT

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023—

Dec 2023—

Mar 2024—

Jun 2024—

Sep 2024-1,111%

Dec 2024—

Mar 2025—

Jun 2025—

Sep 2025—

Dec 2025—

Mar 2026-467%

Jun 2026—

Sep 2026—

Veralto Corporation · VLTO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023-6.0%

Dec 2023-7.4%

Mar 2024-18%

Jun 2024-2.9%

Sep 20246.8%

Dec 202414%

Mar 2025—

Jun 202511%

Sep 20251.4%

Dec 20255.3%

Mar 2026—

Jun 202613%

Sep 2026—

Zurn Elkay Water Solutions Corporation · ZWS

Dec 2021—

Mar 2022—

Jun 202271%

Sep 2022-219%

Dec 2022233%

Mar 2023-21%

Jun 2023-8.3%

Sep 2023—

Dec 202340%

Mar 202448%

Jun 202436%

Sep 202426%

Dec 2024157%

Mar 202521%

Jun 202511%

Sep 202536%

Dec 202517%

Mar 202644%

Jun 2026—

Sep 2026—

08 · compare level, then change

Return On Capital Employed

Zurn Elkay Water Solutions Corporation has the highest ROCE among the 7 Pollution & Treatment Controls companies compared here, at 6.3%. Veralto Corporation is next at 5.1%. Aduro Clean Technologies Inc. has the highest ROCE change at +43.6 percentage points, so level and change sit with different companies. Its ROCE series carries 19 reported observations across the 20-quarter window.

What the numbers say: Zurn Elkay Water Solutions Corporation leads ROCE at 6.3%, 1.2 percentage points above Veralto Corporation. Aduro Clean Technologies Inc. has the strongest latest improvement at +43.6 percentage points. Read the leader beside the density of its reported history: a sparse high return is a candidate; a repeated high return is evidence of durability.

LeaderZurn Elkay Water Solutions Corporation · 6.3%

Gap23.5% versus #2 · Veralto Corporation

Persistence8/8 recent comparable periods

Coverage7/7 companies · 119 observations

Investor read: Zurn Elkay Water Solutions Corporation sets the level benchmark; use the change leader as an inflection watch only after another comparable report confirms it.

This conclusion weakens if: The next two comparable reports reverse the current roce change signal.

ROCE asks how much operating return the business earns on the capital employed. Direction matters, but a single exceptional year should not be mistaken for durability.

ROCEhighest

1Zurn Elkay Water Solutions Corporation ZWS6.3%

2Veralto Corporation VLTO5.1%

3CECO Environmental Corp. CECO · older report0.3%

4PureCycle Technologies, Inc. PCT · older report-5.6%

5Energy Recovery, Inc. ERII · older report-7.5%

ROCE changefastest improvers

1Aduro Clean Technologies Inc. ADUR · older report+43.6 pp

2Zurn Elkay Water Solutions Corporation ZWS+3.1 pp

3PureCycle Technologies, Inc. PCT · older report−0.2 pp

4Veralto Corporation VLTO−0.8 pp

5Energy Recovery, Inc. ERII · older report−1.7 pp

Return on capital · company comparison

7/7 level · 7/7 change

All-company data · latest reported quarter

Company	ROCE	ROCE change	Reported
Zurn Elkay Water Solutions Corporation ZWS	6.3%	+3.1 pp	Jun 2026
Veralto Corporation VLTO	5.1%	−0.8 pp	Sep 2026
CECO Environmental Corp. CECO	0.3%	−11.3 pp	Mar 2026
PureCycle Technologies, Inc. PCT	-5.6%	−0.2 pp	Mar 2026
Energy Recovery, Inc. ERII	-7.5%	−1.7 pp	Mar 2026
Aduro Clean Technologies Inc. ADUR	-36%	+43.6 pp	Mar 2026
CleanCore Solutions, Inc. ZONE	-59%	−28.3 pp	Mar 2026

Full 20-quarter history · every available company

ROCE · reported quarter history

Aduro Clean Technologies Inc. · ADUR

Dec 2021-303%

Mar 2022-424%

Jun 2022-187%

Sep 2022-134%

Dec 2022-128%

Mar 2023-168%

Jun 2023-83%

Sep 2023-103%

Dec 2023-125%

Mar 2024-126%

Jun 2024-115%

Sep 2024-84%

Dec 2024-73%

Mar 2025-80%

Jun 2025-96%

Sep 2025-65%

Dec 2025-79%

Mar 2026-36%

Jun 2026—

Sep 2026—

CECO Environmental Corp. · CECO

Dec 20211.7%

Mar 20221.6%

Jun 20221.8%

Sep 20220.9%

Dec 20222.6%

Mar 20231.5%

Jun 20232.4%

Sep 20232.1%

Dec 20233.4%

Mar 20241.9%

Jun 20242.4%

Sep 20241.8%

Dec 20242.5%

Mar 202512%

Jun 20253.7%

Sep 20251.9%

Dec 20253.0%

Mar 20260.3%

Jun 2026—

Sep 2026—

CleanCore Solutions, Inc. · ZONE

Dec 2021—

Mar 20220.0%

Jun 20224.5%

Sep 2022—

Dec 2022—

Mar 20238.4%

Jun 20230.0%

Sep 2023-43%

Dec 2023-36%

Mar 2024-83%

Jun 2024-29%

Sep 2024-24%

Dec 2024-34%

Mar 2025-31%

Jun 2025-67%

Sep 2025-9.3%

Dec 2025-42%

Mar 2026-59%

Jun 2026—

Sep 2026—

Energy Recovery, Inc. · ERII

Dec 20213.1%

Mar 20224.1%

Jun 2022-1.6%

Sep 20222.6%

Dec 20227.1%

Mar 2023-4.2%

Jun 2023-1.4%

Sep 20234.7%

Dec 20239.2%

Mar 2024-5.2%

Jun 2024-1.0%

Sep 20243.1%

Dec 202411%

Mar 2025-5.8%

Jun 20250.7%

Sep 20251.7%

Dec 202514%

Mar 2026-7.5%

Jun 2026—

Sep 2026—

PureCycle Technologies, Inc. · PCT

Dec 2021-4.4%

Mar 2022-2.5%

Jun 2022-2.6%

Sep 2022-2.9%

Dec 2022-2.9%

Mar 2023-2.6%

Jun 2023-3.1%

Sep 2023-3.4%

Dec 2023-3.8%

Mar 2024-5.2%

Jun 2024-5.3%

Sep 2024-3.6%

Dec 2024-4.2%

Mar 2025-5.4%

Jun 2025-5.8%

Sep 2025-4.9%

Dec 2025-5.7%

Mar 2026-5.6%

Jun 2026—

Sep 2026—

Veralto Corporation · VLTO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 202215%

Dec 202216%

Mar 2023—

Jun 2023—

Sep 20237.0%

Dec 20237.0%

Mar 202413%

Jun 202413%

Sep 20246.7%

Dec 20246.4%

Mar 2025—

Jun 20256.4%

Sep 20255.9%

Dec 20256.3%

Mar 2026—

Jun 20266.1%

Sep 20265.1%

Zurn Elkay Water Solutions Corporation · ZWS

Dec 20210.7%

Mar 20222.2%

Jun 20222.6%

Sep 2022-0.3%

Dec 20221.2%

Mar 20232.5%

Jun 20233.1%

Sep 20232.3%

Dec 20231.3%

Mar 20242.1%

Jun 20242.9%

Sep 20242.8%

Dec 20242.0%

Mar 20252.6%

Jun 20253.2%

Sep 20253.2%

Dec 20252.5%

Mar 20263.4%

Jun 20266.3%

Sep 2026—

ROCE change · reported quarter history

Aduro Clean Technologies Inc. · ADUR

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022+175.3 pp

Mar 2023+256.6 pp

Jun 2023+104.7 pp

Sep 2023+31.7 pp

Dec 2023+3.4 pp

Mar 2024+41.3 pp

Jun 2024−32.1 pp

Sep 2024+18.7 pp

Dec 2024+51.9 pp

Mar 2025+46.3 pp

Jun 2025+18.4 pp

Sep 2025+18.9 pp

Dec 2025−5.8 pp

Mar 2026+43.6 pp

Jun 2026—

Sep 2026—

CECO Environmental Corp. · CECO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022+0.9 pp

Mar 2023−0.1 pp

Jun 2023+0.6 pp

Sep 2023+1.2 pp

Dec 2023+0.8 pp

Mar 2024+0.4 pp

Jun 20240.0 pp

Sep 2024−0.3 pp

Dec 2024−0.9 pp

Mar 2025+9.7 pp

Jun 2025+1.3 pp

Sep 2025+0.1 pp

Dec 2025+0.5 pp

Mar 2026−11.3 pp

Jun 2026—

Sep 2026—

CleanCore Solutions, Inc. · ZONE

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023+8.4 pp

Jun 2023−4.5 pp

Sep 2023—

Dec 2023—

Mar 2024−91.7 pp

Jun 2024−29.4 pp

Sep 2024+19.5 pp

Dec 2024+2.1 pp

Mar 2025+52.4 pp

Jun 2025−37.7 pp

Sep 2025+14.2 pp

Dec 2025−8.2 pp

Mar 2026−28.3 pp

Jun 2026—

Sep 2026—

Energy Recovery, Inc. · ERII

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022+4.0 pp

Mar 2023−8.3 pp

Jun 2023+0.2 pp

Sep 2023+2.1 pp

Dec 2023+2.1 pp

Mar 2024−1.0 pp

Jun 2024+0.4 pp

Sep 2024−1.6 pp

Dec 2024+2.2 pp

Mar 2025−0.6 pp

Jun 2025+1.7 pp

Sep 2025−1.4 pp

Dec 2025+3.0 pp

Mar 2026−1.7 pp

Jun 2026—

Sep 2026—

PureCycle Technologies, Inc. · PCT

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022+1.5 pp

Mar 2023−0.1 pp

Jun 2023−0.5 pp

Sep 2023−0.5 pp

Dec 2023−0.9 pp

Mar 2024−2.6 pp

Jun 2024−2.2 pp

Sep 2024−0.2 pp

Dec 2024−0.4 pp

Mar 2025−0.2 pp

Jun 2025−0.5 pp

Sep 2025−1.3 pp

Dec 2025−1.5 pp

Mar 2026−0.2 pp

Jun 2026—

Sep 2026—

Veralto Corporation · VLTO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023−8.4 pp

Dec 2023−8.9 pp

Mar 2024—

Jun 2024—

Sep 2024−0.3 pp

Dec 2024−0.6 pp

Mar 2025—

Jun 2025−6.3 pp

Sep 2025−0.8 pp

Dec 2025−0.1 pp

Mar 2026—

Jun 2026−0.3 pp

Sep 2026−0.8 pp

Zurn Elkay Water Solutions Corporation · ZWS

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022+0.5 pp

Mar 2023+0.3 pp

Jun 2023+0.5 pp

Sep 2023+2.6 pp

Dec 2023+0.1 pp

Mar 2024−0.4 pp

Jun 2024−0.2 pp

Sep 2024+0.5 pp

Dec 2024+0.7 pp

Mar 2025+0.5 pp

Jun 2025+0.3 pp

Sep 2025+0.4 pp

Dec 2025+0.5 pp

Mar 2026+0.8 pp

Jun 2026+3.1 pp

Sep 2026—

09 · compare level, then change

Valuation Against Growth & Quality

Energy Recovery, Inc. has the lowest PEG among the 7 Pollution & Treatment Controls companies compared here, at 1.82×. Veralto Corporation has the lowest P/E at 23.4×, so level and change sit with different companies. 1 of 7 companies report a comparable reading, the latest through Mar 2026.

What the numbers say: Energy Recovery, Inc. has the lowest comparable PEG at 1.82×. Only 1 of 7 companies have earnings and growth steady enough for the ratio to mean anything, so no broad “cheapest stock” conclusion is defensible unless the current multiple, own-history position and growth durability agree.

LeaderEnergy Recovery, Inc. · 1.82×

GapNot enough peers

Persistence0/8 recent comparable periods

Coverage1/7 companies · 12 observations

Investor read: Treat valuation as permission to investigate, never as a standalone reason to buy.

This conclusion weakens if: The next two comparable reports reverse the current p/e signal.

PEG is shown only when earnings are positive and three-year EPS growth is between 5% and 60%. It is recomputed consistently as the trailing P/E divided by that growth rate — reported earnings, never an expected-earnings multiple. On Indian companies it is shown only where the two data feeds agreed. Where any of that fails the ratio is left out rather than printed: a P/E divided by a loss, or by growth measured off a tiny base, is a number that looks precise and means nothing.

PEGlowest PEG

1Energy Recovery, Inc. ERII · older report1.8

P/Elowest P/E

1Veralto Corporation VLTO23.4

2Energy Recovery, Inc. ERII · older report26.5

3Zurn Elkay Water Solutions Corporation ZWS31.2

4CECO Environmental Corp. CECO · older report161.0

Valuation · company comparison

1/7 level · 4/7 change

All-company data · latest reported quarter

Company	PEG	P/E	Reported
Energy Recovery, Inc. ERII	1.8	26.5	Mar 2026
Zurn Elkay Water Solutions Corporation ZWS	1.4	31.2	Jun 2026
Veralto Corporation VLTO	—	23.4	Sep 2026
CECO Environmental Corp. CECO	—	161.0	Mar 2026

Full 20-quarter history · every available company

PEG · reported quarter history

Energy Recovery, Inc. · ERII

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 2023—

Dec 2023—

Mar 2024—

Jun 2024—

Sep 20242.0

Dec 20243.4

Mar 2025—

Jun 20251.8

Sep 2025—

Dec 2025—

Mar 2026—

Jun 2026—

Sep 2026—

Zurn Elkay Water Solutions Corporation · ZWS

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 20231.3

Dec 20231.5

Mar 2024—

Jun 2024—

Sep 20241.3

Dec 20240.8

Mar 20250.7

Jun 20250.9

Sep 20251.0

Dec 20251.5

Mar 20261.4

Jun 2026—

Sep 2026—

P/E · reported quarter history

CECO Environmental Corp. · CECO

Dec 2021155.8

Mar 202268.6

Jun 202229.9

Sep 202229.5

Dec 202223.4

Mar 202328.6

Jun 202328.4

Sep 202331.9

Dec 202354.8

Mar 202465.8

Jun 202480.1

Sep 202485.5

Dec 202484.0

Mar 202517.7

Jun 202519.8

Sep 202536.3

Dec 202543.7

Mar 2026161.0

Jun 2026—

Sep 2026—

Energy Recovery, Inc. · ERII

Dec 202189.5

Mar 202274.6

Jun 202292.5

Sep 202280.5

Dec 202248.8

Mar 2023135.6

Jun 2023155.3

Sep 202378.6

Dec 202350.9

Mar 202446.4

Jun 202436.9

Sep 202451.2

Dec 202436.8

Mar 202543.0

Jun 202530.4

Sep 202545.4

Dec 202532.1

Mar 202626.5

Jun 2026—

Sep 2026—

Veralto Corporation · VLTO

Dec 2021—

Mar 2022—

Jun 2022—

Sep 2022—

Dec 2022—

Mar 2023—

Jun 2023—

Sep 202324.4

Dec 202324.2

Mar 202427.5

Jun 202429.9

Sep 202434.0

Dec 202430.5

Mar 2025—

Jun 202525.4

Sep 202529.0

Dec 202529.4

Mar 2026—

Jun 202622.7

Sep 202623.4

Zurn Elkay Water Solutions Corporation · ZWS

Dec 202191.0

Mar 202238.1

Jun 202226.2

Sep 202258.3

Dec 202257.2

Mar 202359.3

Jun 202399.6

Sep 202348.3

Dec 202346.0

Mar 202450.7

Jun 202440.3

Sep 202446.1

Dec 202440.5

Mar 202533.7

Jun 202536.2

Sep 202542.0

Dec 202540.4

Mar 202636.2

Jun 202631.2

Sep 2026—

10 · before the conclusion, check the blind spots

What can make this comparison misleading?

This Pollution & Treatment Controls comparison names 6 specific ways its own evidence can mislead, all listed below. 5 of the 7 companies report on an older date than the sector's freshest reporters, so their ranks are marked stale. 1 of the 5 ranked sections has fewer than three usable current readings.

Keep these limits visible

A high growth rate can be a low-base artefact. The page keeps level and change separate for that reason.
A high ROCE can be temporary or flattered by a small capital base. Read it beside margin, cash conversion and reinvestment.
The 4-Factor Sector Score ranks research priority, not portfolio action. Management quality, catalysts and risks need equally fresh evidence before capital is deployed.
An “all companies” line chart preserves completeness, but rank changes should be checked against reporting dates before drawing a conclusion.
5 companies have older fundamental reporting dates than the sector’s freshest reporters; their ranks carry a stale marker.
Thin comparisons: Valuation have fewer than three usable current readings.

11 · evidence and freshness

How was this comparison built?

This comparison is built from the reported filings of 7 Pollution & Treatment Controls companies, normalized to a common $ scale and a shared quarter axis of up to 20 quarters each. Fundamentals run through Sep 2026 and market data through 2026-08-04. A second data feed fills gaps only after identity and scale reconciliation, and missing observations are never interpolated.

FundamentalsThrough Sep 2026 · up to 20 quarters per company

Market dataThrough 2026-08-04 · weekly price and relative-strength history

Derived metricsGrowth, changes and PEG are calculated only when their inputs are comparable.

Score confidenceMissing and stale evidence reduces confidence and pulls the 0–100 research-priority score toward neutral.

12 · questions investors ask, short speakable answers

Pollution & Treatment Controls company comparison FAQs

These 21 answers restate the Pollution & Treatment Controls comparison above in question form. Every one is computed from the same 7 companies and the same reported filings as the rankings and charts, current through Sep 2026. Price and relative-strength answers run through 2026-08-04. Nothing here is estimated, and none of it is a recommendation.

Is the Pollution & Treatment Controls sector outperforming S&P 500?

Which Pollution & Treatment Controls company is largest by revenue?

CECO Environmental Corp. leads with revenue of $804 million, based on 4 of 7 comparable companies through Mar 2026.

Which Pollution & Treatment Controls company is growing fastest?

CleanCore Solutions, Inc. has the fastest current revenue growth at 100%, across 3 of 7 comparable companies.

Which Pollution & Treatment Controls company has the strongest 4-Factor Sector Score?

Zurn Elkay Water Solutions Corporation ranks first at 57.6/100 with 52.5% evidence confidence. The score prioritizes research; it is not a buy recommendation.

Which Pollution & Treatment Controls company has the lowest comparable PEG?

Energy Recovery, Inc. has the lowest comparable PEG at 1.82, among 1 of 7 companies whose earnings and growth are steady enough for the ratio to mean anything.

How much history does this Pollution & Treatment Controls comparison include?

The page compares up to 20 reported quarters per company for fundamentals, returns and valuation, ending Sep 2026. Missing observations remain blank rather than being estimated.

How is the 4-Factor Sector Score calculated?

The four visible contributions add directly: growth and earnings up to 35 points, capital efficiency up to 25, valuation up to 20, and relative strength up to 20. Missing or stale evidence moves only the affected contribution toward neutral.

Which Pollution & Treatment Controls company is the biggest?

CECO Environmental Corp. is the largest, with trailing-twelve-month revenue of $804 million, ahead of Energy Recovery, Inc. at $137 million. That covers 4 of 7 companies with comparable reporting through Mar 2026.

Which Pollution & Treatment Controls company has the best profit margins?

Veralto Corporation has the highest operating margin at 23.8%, from 4 of 7 comparable companies. Aduro Clean Technologies Inc. shows the biggest recent improvement, at +3610.8 percentage points. A high margin matters most when it is holding or rising, not when it is peaking.

Which Pollution & Treatment Controls company makes the most profit?

Energy Recovery, Inc. earns the most, at $21 million of trailing-twelve-month net profit, from 5 of 7 comparable companies. CECO Environmental Corp. has the fastest profit growth at -65.3%, though growth off a small or recovering profit base overstates how much has actually changed.

Which Pollution & Treatment Controls company earns the highest return on capital?

Zurn Elkay Water Solutions Corporation leads on return on capital employed at 6.3%, across 7 of 7 companies. Read it beside the length of its reported history: a high return that repeats for years is evidence of a durable business, while a single high reading can be a small capital base or one good year.

Which Pollution & Treatment Controls stock is the cheapest?

On PEG — where a LOWER number is cheaper — Energy Recovery, Inc. screens cheapest at 1.82×. Only 1 of 7 companies have earnings and growth steady enough for the ratio to mean anything, so this is not a sector-wide "cheapest stock" verdict. Cheap on a multiple is a reason to investigate, never a reason to buy on its own.

Is the Pollution & Treatment Controls sector beating the market?

Pollution & Treatment Controls has underperformed S&P 500 by 16.3% over the last 52 weeks and 8.6% over 13 weeks, measured on an equal-weight index of its current members. Inside the sector, 2 of 7 covered companies are beating the market on their own. Sector strength does not transfer evenly to every stock in it.

Which Pollution & Treatment Controls stock has the strongest price momentum?

Aduro Clean Technologies Inc. has the strongest relative strength against S&P 500. Relative strength answers last, after growth, quality and valuation: price can move well before the fundamentals confirm it, and sometimes without them confirming at all.

Which Pollution & Treatment Controls company scores highest for research priority?

Zurn Elkay Water Solutions Corporation scores 57.6 out of 100 with 52.5% evidence confidence, from 21.4 points on growth and earnings, 17 on capital efficiency, 10 on valuation and 9.2 on relative strength. This ranks what deserves work next. It is not a buy recommendation, and management quality, catalysts and risk still need separate research.

How many Pollution & Treatment Controls companies does this comparison cover, and over what period?

It compares 7 listed companies over up to 20 reported quarters of fundamentals, ending Sep 2026, plus weekly price and relative-strength history. Membership is the full sector list — nothing is dropped for having thin data.

What is the total market cap of the Pollution & Treatment Controls sector?

The 7 Pollution & Treatment Controls companies on this page carry $38,959 million of combined market value. Veralto Corporation is the largest at $23,514 million, about 60% of the sector's total on its own. Market value moves with price, so this reading is dated 2026-08-04.

How is the Pollution & Treatment Controls sector performing?

2 of the 7 covered Pollution & Treatment Controls companies are beating S&P 500 on Mansfield relative strength. The sector itself is 16.3% behind S&P 500 over 52 weeks on an equal-weight index of its current members. Readings are as of 2026-08-04.

How many Pollution & Treatment Controls stocks are listed in the US?

This comparison covers 7 listed Pollution & Treatment Controls companies in the US, each above the size floor the site applies. The full ranked list is on this page, with reported fundamentals through Sep 2026. Membership is the full industry list — nothing is dropped for having thin data.

Why are some values on this page blank?

A blank means that company did not report a comparable figure for that period, so nothing is shown. Missing observations are never interpolated, carried forward, or replaced with a similar-looking accounting line, and a company with missing evidence has its research score pulled toward neutral rather than being scored as bad.

Is this investment advice?

No. Every figure here is a deterministic calculation from reported company filings and market data, published for research. It contains no recommendation to buy or sell any security, does not account for your circumstances, and is not a substitute for advice from a licensed adviser.