The Dutch Authority for the Financial Markets has published a sanction notice stating that it imposed a EUR 625,000 fine on M. van Wettum on 16 January 2026 for market manipulation. The case concerns trading in shares of NX Filtration N.V., a company listed on Euronext Amsterdam, where Van Wettum, acting through an investment company of which he was an indirect director, was found to have given the market a misleading signal and artificially raised the share's closing price. According to the authority, near the end of the last trading day of 2023 Van Wettum instructed his broker to buy additional NX Filtration shares with the aim of pushing the price from EUR 6.30 to EUR 6.70 and having it close at that level. A recorded phone call showed that objective, and the executed trades resulted in a 6.35% increase to a year-end closing price of EUR 6.70. The authority characterized the conduct as "marking the close" under Article 15 of the EU Market Abuse Regulation, saying it undermined fair price formation and distorted an important valuation reference point at year-end.
Dutch Authority for the Financial Markets2026-07-13
Dutch Authority for the Financial Markets fines M. van Wettum EUR 625,000 for marking the close in NX Filtration shares
The Dutch Authority for the Financial Markets disclosed a EUR 625,000 fine imposed on M. van Wettum for market manipulation in NX Filtration shares. It found he used late-day purchases on the final trading day of 2023 to push the stock from EUR 6.30 to a EUR 6.70 close, constituting "marking the close" under the EU Market Abuse Regulation.