Industrials / Pollution & Treatment Controls
Exclusive insider sentiment analysis for the Pollution & Treatment Controls sector. Track real-time Director purchases and institutional money flow to identify high-conviction opportunities before the market reacts.
| Filing Date | Trade Date | Ticker | Company Name | Reporting Person | Relationship | Industry | Type | Price | Qty | Total, $ | Owned After | Change, % |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2026-06-26 21:11 | 2026-06-24 | CECO | CECO ENVIRONMENTAL CORP | Johansson Peter K. | Officer; SVP, Chief Financial Officer | Pollution & Treatment Controls | SALE | $96.49 | 30,000 | $2,894,802 | 40,746 | -42.4% |
| 2026-06-26 21:13 | 2026-06-24 | CECO | CECO ENVIRONMENTAL CORP | DEZWIREK JASON | Director | Pollution & Treatment Controls | SALE | $96.94 | 68,000 | $6,592,199 | 132,000 | -34.0% |
| 2026-06-17 20:11 | 2026-06-15 | ERII | Energy Recovery, Inc. | Sabol Colin R | Director | Pollution & Treatment Controls | BUY | $8.88 | 11,180 | $99,267 | 55,671 | +25.1% |
| 2026-06-17 20:08 | 2026-06-15 | ERII | Energy Recovery, Inc. | BUEHLER ALEXANDER J | Director, Officer; Interim President and CEO | Pollution & Treatment Controls | OPT+S | $8.71 | 14,900 | $129,779 | 66,755 | -18.2% |
| 2026-06-15 21:18 | - | SCWO | 374Water Inc. | Meyers Brad Ian | Officer; Chief Operating Officer | Pollution & Treatment Controls | SALE | $2.39 | 18,831 | $45,046 | 30,169 | -38.4% |
| 2026-06-09 20:51 | 2026-06-05 | LIQT | LIQTECH INTERNATIONAL INC | Bleichroeder LP | 10% owner | Pollution & Treatment Controls | BUY | $1.00 | 700,000 | $700,000 | 3,882,239 | +22.0% |
| 2026-06-03 23:35 | 2026-06-01 | CECO | CECO ENVIRONMENTAL CORP | WALLMAN RICHARD F | Director | Pollution & Treatment Controls | BUY | $76.85 | 20,000 | $1,536,938 | 105,500 | +23.4% |
| 2026-05-22 22:29 | 2025-05-20 | RAIN | Rain Enhancement Technologies Holdco, Inc. | Seidl Randy | Director, Officer; Chief Executive Officer | Pollution & Treatment Controls | BUY | $2.37 | 42,514 | $100,949 | 644,834 | +7.1% |
| 2026-05-15 21:31 | 2026-05-13 | ERII | Energy Recovery, Inc. | TONDREAU PAMELA L. | Director | Pollution & Treatment Controls | BUY | $8.34 | 20,000 | $166,840 | 37,362 | +115.2% |
| 2026-05-13 19:30 | 2026-05-12 | PCT | PureCycle Technologies, Inc. | SYLEBRA CAPITAL LLC | Director, 10% owner | Pollution & Treatment Controls | BUY | $0.00 | 16,622 | $0 | 34,113,545 | +0.0% |
| 2026-05-06 21:47 | 2026-05-04 | ARQ | Arq, Inc. | Voncannon Jay Loring | Officer; Chief Financial Officer | Pollution & Treatment Controls | SALE | $2.27 | 16,709 | $37,929 | 48,291 | -25.7% |
| 2026-05-05 20:40 | 2026-05-01 | VLTO | Veralto Corp | Skeete Bernard M | Officer; Chief Accounting Officer | Pollution & Treatment Controls | SALE | $88.21 | 300 | $26,463 | 4,760 | -5.9% |
| 2026-05-04 19:04 | 2026-05-01 | CECO | CECO ENVIRONMENTAL CORP | Nanda Munish | Director | Pollution & Treatment Controls | SALE | $74.00 | 11,218 | $830,145 | 62,031 | -15.3% |
| 2026-05-01 20:03 | 2026-04-29 | CECO | CECO ENVIRONMENTAL CORP | WALLMAN RICHARD F | Director | Pollution & Treatment Controls | BUY | $73.43 | 15,000 | $1,101,491 | 85,500 | +21.3% |
| 2026-04-28 00:00 | 2026-04-23 | CLIR | ClearSign Technologies Corp | Silva Gil Todd | Director | Pollution & Treatment Controls | BUY | $5.28 | 2,000 | $10,569 | 6,000 | +50.0% |
| 2026-04-08 23:04 | 2026-04-06 | ERII | Energy Recovery, Inc. | Hanstveit Arve | Director | Pollution & Treatment Controls | SALE | $10.29 | 2,419 | $24,892 | 382,509 | -0.6% |
| 2026-04-06 22:16 | 2026-04-02 | ERII | Energy Recovery, Inc. | Hanstveit Arve | Director | Pollution & Treatment Controls | SALE | $10.14 | 165,292 | $1,676,061 | 384,928 | -30.0% |
| 2026-03-24 20:30 | 2026-03-23 | ARQ | Arq, Inc. | Campbell-Breeden Richard | Director | Pollution & Treatment Controls | BUY | $2.21 | 150,000 | $331,665 | 404,786 | +58.9% |
| 2026-03-19 23:30 | 2026-03-16 | CLIR | ClearSign Technologies Corp | Silva Gil Todd | Director | Pollution & Treatment Controls | BUY | $4.28 | 4,000 | $17,110 | 4,000 | +100.0% |
| 2026-03-19 20:30 | 2026-03-17 | ARQ | Arq, Inc. | Wong Joseph M | Officer; Chief Technology Officer | Pollution & Treatment Controls | BUY | $1.89 | 10,000 | $18,900 | 400,686 | +2.6% |
| 2026-03-17 20:30 | 2026-03-13 | ARQ | Arq, Inc. | EICHER CAROL S | Director | Pollution & Treatment Controls | BUY | $1.95 | 77,500 | $151,009 | 174,010 | +80.3% |
| 2026-03-16 21:32 | 2026-03-12 | ARQ | Arq, Inc. | Smith Claiborne Benson | Officer; Gen Counsel, Corp Secretary | Pollution & Treatment Controls | BUY | $1.92 | 2,000 | $3,836 | 102,491 | +2.0% |
| 2026-03-11 20:33 | 2026-03-10 | ERII | Energy Recovery, Inc. | Hanstveit Arve | Director | Pollution & Treatment Controls | SALE | $10.96 | 25,000 | $273,975 | 550,220 | -4.3% |
| 2026-03-10 20:11 | 2026-03-10 | FSS | FEDERAL SIGNAL CORP /DE/ | Maue Richard A | Director | Pollution & Treatment Controls | BUY | $110.77 | 2,000 | $221,532 | 2,000 | +100.0% |
| 2026-03-09 20:05 | 2026-03-06 | FTEK | FUEL TECH, INC. | ARNONE VINCENT J | Director, Officer; President & CEO | Pollution & Treatment Controls | BUY | $1.24 | 10,000 | $12,400 | 549,513 | +1.9% |
| 2026-03-09 21:33 | 2026-03-05 | ERII | Energy Recovery, Inc. | Hanstveit Arve | Director | Pollution & Treatment Controls | SALE | $10.69 | 50,000 | $534,400 | 575,220 | -8.0% |
| 2026-03-07 02:48 | 2026-03-05 | ERII | Energy Recovery, Inc. | Ramanan Natarajan | Officer; Chief Technology Officer | Pollution & Treatment Controls | SALE | $10.57 | 272 | $2,875 | 52,565 | -0.5% |
| 2026-03-07 02:49 | 2026-03-04 | ERII | Energy Recovery, Inc. | Clemente Rodney | Officer; SVP, Water | Pollution & Treatment Controls | SALE | $10.61 | 20,568 | $218,309 | 116,008 | -15.1% |
| 2026-03-04 01:10 | 2026-02-27 | VLTO | Veralto Corp | Kapity Melissa | Officer; SVP, Water Quality | Pollution & Treatment Controls | OPT+S | $96.60 | 14,840 | $1,433,544 | 10,224 | -59.2% |
| 2026-03-02 16:39 | 2026-02-27 | BCHT | Birchtech Corp. | MacPherson Richard | Director, Officer, 10% owner; President and CEO | Pollution & Treatment Controls | BUY | $2.40 | 312,500 | $750,000 | 2,955,095 | +11.8% |
| 2026-02-20 01:43 | 2026-02-17 | ZWS | Zurn Elkay Water Solutions Corp | JAHNKE TIMOTHY J | Director | Pollution & Treatment Controls | SALE | $51.18 | 25,000 | $1,279,500 | 266,864 | -8.6% |
| 2026-02-20 01:43 | 2026-02-17 | ZWS | Zurn Elkay Water Solutions Corp | LaValle Jeffrey J. | Officer; VP, General Counsel & Sec'y | Pollution & Treatment Controls | SALE | $50.86 | 447 | $22,734 | 51,421 | -0.9% |
| 2026-02-20 01:43 | 2026-02-17 | ZWS | Zurn Elkay Water Solutions Corp | PETERSON MARK W | Officer; Chief Administrative Officer | Pollution & Treatment Controls | SALE | $50.86 | 2,006 | $102,025 | 333,814 | -0.6% |
| 2026-02-20 01:43 | 2026-02-17 | ZWS | Zurn Elkay Water Solutions Corp | Troutman Michael | Officer; Chief Information Officer | Pollution & Treatment Controls | SALE | $50.80 | 448 | $22,758 | 61,327 | -0.7% |
| 2026-02-20 01:44 | 2026-02-17 | ZWS | Zurn Elkay Water Solutions Corp | Chhabra Sudhanshu | Officer; VP-Zurn Business Systems | Pollution & Treatment Controls | SALE | $50.85 | 2,021 | $102,768 | 69,556 | -2.8% |
| 2026-02-14 02:21 | 2026-02-11 | ZWS | Zurn Elkay Water Solutions Corp | Troutman Michael | Officer; Chief Information Officer | Pollution & Treatment Controls | SALE | $51.67 | 919 | $47,485 | 61,775 | -1.5% |
| 2026-02-14 02:22 | 2026-02-11 | ZWS | Zurn Elkay Water Solutions Corp | LaValle Jeffrey J. | Officer; VP, General Counsel & Sec'y | Pollution & Treatment Controls | SALE | $51.63 | 946 | $48,842 | 51,868 | -1.8% |
| 2026-02-14 02:22 | 2026-02-11 | ZWS | Zurn Elkay Water Solutions Corp | Pauli David J | Officer; Chief Financial Officer | Pollution & Treatment Controls | SALE | $51.61 | 812 | $41,907 | 65,995 | -1.2% |
| 2026-02-14 02:22 | 2026-02-11 | ZWS | Zurn Elkay Water Solutions Corp | PETERSON MARK W | Officer; Chief Administrative Officer | Pollution & Treatment Controls | SALE | $51.48 | 3,793 | $195,264 | 335,820 | -1.1% |
| 2026-02-14 02:22 | 2026-02-11 | ZWS | Zurn Elkay Water Solutions Corp | Schoon Jeffrey A | Officer; President | Pollution & Treatment Controls | SALE | $51.54 | 1,286 | $66,280 | 61,255 | -2.1% |
| 2026-02-11 04:41 | 2026-02-10 | ZWS | Zurn Elkay Water Solutions Corp | Schoon Jeffrey A | Officer; President | Pollution & Treatment Controls | SALE | $51.80 | 12,034 | $623,361 | 62,541 | -16.1% |
| 2026-02-11 04:42 | 2026-02-10 | ZWS | Zurn Elkay Water Solutions Corp | Troutman Michael | Officer; Chief Information Officer | Pollution & Treatment Controls | SALE | $51.80 | 5,922 | $306,760 | 62,694 | -8.6% |
| 2026-02-11 04:43 | 2026-02-10 | ZWS | Zurn Elkay Water Solutions Corp | LaValle Jeffrey J. | Officer; VP, General Counsel & Sec'y | Pollution & Treatment Controls | SALE | $51.80 | 6,097 | $315,825 | 49,803 | -10.9% |
| 2026-02-11 04:43 | 2026-02-10 | ZWS | Zurn Elkay Water Solutions Corp | PETERSON MARK W | Officer; Chief Administrative Officer | Pollution & Treatment Controls | SALE | $51.80 | 35,267 | $1,826,831 | 333,739 | -9.6% |
| 2026-02-11 04:43 | 2026-02-09 | ZWS | Zurn Elkay Water Solutions Corp | ADAMS TODD A. | Director, Officer; Chairman and CEO | Pollution & Treatment Controls | SALE | $52.22 | 538,397 | $28,115,307 | 2,256,684 | -19.3% |
| 2026-02-11 04:43 | 2026-02-10 | ZWS | Zurn Elkay Water Solutions Corp | Pauli David J | Officer; Chief Financial Officer | Pollution & Treatment Controls | SALE | $51.80 | 7,639 | $395,700 | 66,807 | -10.3% |
| 2026-02-10 01:57 | 2026-02-05 | ERII | Energy Recovery, Inc. | Yeung William | Officer; Chief Legal Officer | Pollution & Treatment Controls | SALE | $14.82 | 1,536 | $22,766 | 78,208 | -1.9% |
| 2026-02-10 01:53 | 2026-02-05 | ERII | Energy Recovery, Inc. | Clemente Rodney | Officer; SVP, Water | Pollution & Treatment Controls | SALE | $14.59 | 724 | $10,563 | 90,950 | -0.8% |
| 2026-02-07 01:55 | 2026-02-05 | ZWS | Zurn Elkay Water Solutions Corp | PETERSON MARK W | Officer; Chief Administrative Officer | Pollution & Treatment Controls | SALE | $51.40 | 23,183 | $1,191,606 | 295,378 | -7.3% |
| 2026-02-07 01:55 | 2026-02-04 | ZWS | Zurn Elkay Water Solutions Corp | JAHNKE TIMOTHY J | Director | Pollution & Treatment Controls | SALE | $50.44 | 17,900 | $902,876 | 288,964 | -5.8% |
Strategic Analysis
Analyzing insider transactions within the Pollution & Treatment Controls sector provides critical insights into institutional sentiment. When multiple executives across different companies in the same industry exhibit similar buying patterns (cluster buying), it often signals an upcoming sector-wide recovery or undervalued market conditions.
Regulatory Transparency
Our platform tracks SEC Form 4 filings in real-time. We differentiate between routine option exercises and open-market purchases to give you a clear view of "Skin in the Game". Understanding the roles of Directors vs. 10% Owners helps prioritize signals that carry the most predictive weight.
UNDERSTANDING THE DATA
FILING DATE: The date and time when the transaction was reported to the SEC. This is when the public first receives the information.
TRADE DATE: The actual day the insider executed the purchase or sale in the market.
INDUSTRY: The specific market sector the company operates in. Useful for identifying broader institutional capital flows across sectors.
OWNED AFTER: The total number of shares held by the insider following the transaction. This highlights the insider's remaining conviction in the company.
CHANGE %: The percentage increase or decrease of the insider's total position. Large percentage changes often carry more weight than the dollar amount alone.
TRADE TYPES DEFINITIONS
BUY: An open market purchase. Typically indicates an insider's belief that the stock is undervalued or poised for growth.
SELL: An open market sale. While often used for diversification or liquidity, large or unexpected sales can be a warning signal.
OPT+S (OPTION EXERCISE & SALE): This occurs when an insider exercises their stock options and sells them immediately. Often part of a structured compensation plan.