Short answer: That cannot be answered unequivocally. Statements by prosecutors, authorities, tax experts and defendants indicate that the tax-driven deals are still going on. For Cum-Ex deals, a team from the ARD magazine Panorama 2018 showed that such deals are still being offered.
The Federal Ministry of Finance theoretically stopped the Cum-Cum variant by amending the law in 2016. However, Christoph Spengel, professor of economics at the University of Mannheim, believes that this change in the law has not helped to curb the fraud.
In addition, the Federal Court of Audit assumes that so-called cum fake deals - another variant of cum ex transactions - were still possible in Germany until at least the end of 2020.
One of the main players in the cum-ex deals, former British trader Sanjay Shah, who is under investigation in three European countries, says he wants to resume his business, which he believes is perfectly legal.
So there are many indications that the tax heist is still possible.