Liqtech International, Inc.
A clean-technology company based in Ballerup, Denmark, that builds filtration systems around silicon carbide — one of the hardest man-made materials, originally pursued in the quest for artificial diamonds. Its ceramic membranes and diesel particulate filters clean industrial wastewater, ship exhaust, and soot from diesel engines. Founded in Copenhagen around the year 2000, it took the name LiqTech International in 2011 as it grew into global markets.
Granted 10.0K
Bought 1.52M
Bought 700.0K
Granted 100.0K · Bought 35.0K · Sold 750.0K
Sold 130.0K
Granted 25.0K · Bought 537.0K
Granted 50.0K · Sold 632.2K
Granted 202.0K
Sold 2.01M
Bought 42.0K
Granted 533.1K · Bought 520.0K
Granted 1.20M · Bought 2.00M
Granted 1.90M · Bought 32.8K
Granted 216.2K · Bought 19.2K
Granted 100.0K
Granted 47.5K · Bought 167.0K
Granted 1.12M · Bought 80.0K · Sold 25.0K
Granted 147.5K · Bought 527.5K
Granted 100.0K
Granted 94.4K
Granted 64.8K · Bought 195.1K
Granted 48.9K
Granted 13.7K
Bought 1.5K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Sune MathiesenChief Executive Officer, Director, 10% owner · 3 transactions | — | 8.10Mas of Apr 2015 | 10.0K | — | — |
| Lytton Laurence W10% owner · 9 transactions | — | 7.21Mas of May 2022 | — | 1.52M | — |
| Bleichroeder LP10% owner · 2 transactions | — | 6.88M | — | 700.0K | — |
| Petersen AldoDirector · 4 transactions | — | 6.35Mas of Aug 2014 | 100.0K | 35.0K | 750.0K |
| AWM Investment Company, Inc.10% owner · 2 transactions | — | 4.22Mas of Nov 2019 | — | — | 130.0K |
| Andreassen LasseDirector · 2 transactions | — | 2.74Mas of Oct 2013 | 25.0K | 537.0K | — |
| Degn SorenChief Financial Officer · 12 transactions | — | 2.03Mas of Dec 2013 | 50.0K | — | 632.2K |
| Barish Michael SDirector · 11 transactions | — | 1.80Mas of Jul 2015 | 202.0K | — | — |
| Nemelka David Nephi Jr.Former 10% Owner · 1 transaction | — | 1.52Mas of Sep 2012 | — | — | 2.01M |
| Sonneland MichaelDirector · 1 transaction | — | 951.7Kas of Apr 2012 | — | 42.0K | — |
| Vernon MarkDirector · 14 transactions | — | 917.1Kas of Jan 2023 | 533.1K | 520.0K | — |
| Buehler Alexander JDirector · 8 transactions | — | 467.6Kas of Jan 2025 | 1.20M | 2.00M | — |
| Chen FeiChief Executive Officer, Director · 11 transactions | — | 417.9K | 1.90M | 32.8K | — |
| Burgon PaulDirector · 10 transactions | — | 235.4Kas of Jan 2017 | 216.2K | 19.2K | — |
| Nemelka John FritzenDirector · 1 transaction | — | 215.3Kas of Apr 2013 | 100.0K | — | — |
| Debelak Donald SPresident, Liqtech NA · 6 transactions | — | 214.7Kas of Aug 2015 | 47.5K | 167.0K | — |
| Stadil Simon SeidelinChief Financial Officer · 10 transactions | — | 158.9Kas of Jan 2024 | 1.12M | 80.0K | 25.0K |
| Boswell PeytonDirector · 9 transactions | — | 121.3Kas of Jan 2025 | 147.5K | 527.5K | — |
| Leifland PeterDirector · 1 transaction | — | 100.0Kas of Mar 2019 | 100.0K | — | — |
| Kowalczyk DavidCFO and COO · 2 transactions | — | 88.8K | 94.4K | — | — |
| Meeusen Richard ADirector · 6 transactions | — | 67.3Kas of Jan 2025 | 64.8K | 195.1K | — |
| Kunz MartinDirector · 3 transactions | — | 48.9Kas of Jan 2025 | 48.9K | — | — |
| Krommenhoek Adam RFormer 10% Owner · 1 transaction | — | 20.0Kas of Aug 2011 | — | — | — |
| Tattersall Gordon McKayDirector · 1 transaction | — | 20.0Kas of Aug 2011 | — | — | — |
| Price Phillip MassieInterim CFO · 1 transaction | — | 13.7Kas of May 2024 | 13.7K | — | — |
| Toftegaard ClausChief Financial Officer · 1 transaction | — | 1.5Kas of Aug 2019 | — | 1.5K | — |
Select a row to see that insider’s individual transactions. Sum of the holdings confirmed in the 12 months before this insider's last filing. A Form 4 reports a holding per line — held directly, or through a named trust, partnership or foundation, and in each share class separately — never a person’s total. Lines not restated in that time are left out and shown apart: an active filer restates what they still hold, so a line they did not restate is more often an entity since renamed, whose shares a successor line reports too. An amber marker means some were left out.
Net open-market activity over all recorded history: +2.83M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.