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.
Bought 1.52M
Bought 700.0K
Granted 208.5K · Bought 500.0K
Granted 1.20M · Bought 2.00M
Granted 1.90M · Bought 32.8K
Granted 1.12M · Bought 80.0K · Sold 25.0K
Granted 142.9K · Bought 510.0K
Granted 94.4K
Granted 39.8K · Bought 192.1K
Granted 48.9K
Granted 13.7K
| Insider | Stake change | Holds now | Granted / vested | Bought | Sold |
|---|---|---|---|---|---|
| Lytton Laurence W10% owner · 9 transactions | — | 7.21Mas of May 2022 | — | 1.52M | — |
| Bleichroeder LP10% owner · 2 transactions | — | 6.88M | — | 700.0K | — |
| Vernon MarkDirector · 3 transactions | +360.2% | 917.1Kas of Jan 2023 | 208.5K | 500.0K | — |
| Buehler Alexander JDirector · 7 transactions | +1476.6% | 467.6Kas of Jan 2025 | 1.20M | 2.00M | — |
| Chen FeiChief Executive Officer, Director · 11 transactions | — | 417.9K | 1.90M | 32.8K | — |
| Stadil Simon SeidelinChief Financial Officer · 10 transactions | — | 158.9Kas of Jan 2024 | 1.12M | 80.0K | 25.0K |
| Boswell PeytonDirector · 6 transactions | +157.2% | 121.3Kas of Jan 2025 | 142.9K | 510.0K | — |
| Kowalczyk DavidCFO and COO · 2 transactions | — | 88.8K | 94.4K | — | — |
| Meeusen Richard ADirector · 4 transactions | +140.3% | 67.3Kas of Jan 2025 | 39.8K | 192.1K | — |
| Kunz MartinDirector · 3 transactions | — | 48.9Kas of Jan 2025 | 48.9K | — | — |
| Price Phillip MassieInterim CFO · 1 transaction | — | 13.7Kas of May 2024 | 13.7K | — | — |
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 the last 5 years: +5.51M shares. Grants, option exercises and tax withholding are excluded — they are compensation mechanics, not decisions to buy or sell.