Jan Bertus Marten Warntjes

Jan Bertus Marten Warntjes has filed trades across 2 companies (mainly through Finansinspektionen), most often in SyntheticMR AB (publ) and SyntheticMR AB. Between 27 August 2021 and 30 June 2025, the trades on record add up to 5 filings.

In open-market terms, that means 1 purchase worth €63k on one side and 3 sales worth €66k on the other. Sales outweigh purchases by €2,162. A purchase on the market is a deliberate choice to commit personal money, which is why it draws more attention than a grant. 2025 to date brings 1 purchase and 2 sales.

On 3 July 2025 came the latest disclosure, an open-market sale for €141 in SyntheticMR AB. The latest purchase dates back some time: it was published 661 days ago, on 16 January 2025. Between a trade and the moment it shows up on Finansinspektionen, the median delay is 2 days. For comparison, MAR article 19 gives managers three business days to notify a trade. Selling is not necessarily a view on the stock: liquidity needs and diversification are common motives. Source: insider filings from Finansinspektionen. Past trades are no guide to future returns.