That doesn't mean you should assume I don't know the difference between Denmark and Holland.
Tax haven is not an official title for any country or place but a definition and Denmark is by definition a tax haven for holdning companies.
Just because it's not well known doesn't mean it's not a tax haven. That word is quite ambiguous. Most countries have some sort of setup to attract foreign investments.
"Back in 1999, Denmark allowed Danish companies to hold shares in foreign subsidiaries. In 2009, the Danish government enacted the Danish Tax Reform Act allowing international corporate investors to use Denmark as a holding company jurisdiction. The 2009 Danish Tax Reform law improved Danish participation exemptions applied to dividends and capital gains realized on the transfer of shares by abolishing the holding periods of one year and three years respectively.
Another benefit is the ability to receive dividend payments subject to little or no taxes. Other tax haven jurisdictions often do not provide such benefits. The condition for a no tax status on dividends is that an entity owns at least 25% of the Danish company.
PepsiCo and other large international companies have established over 500 Danish holding companies over the past few years. PepsiCo Investments, the PepsiCo Danish Holding Company, is managed from a small Copenhagen office by one tax lawyer. Such international demand created a dynamic holding company industry in Denmark.
In essence, Denmark allows the registration of completely tax-free holding companies. Dutch holding companies can receive income from numerous different sources and simply pass them to other corporations in different countries. This is why holding companies are globally famous for their tax free funds “pass through” capabilities."
https://www.offshorecompany.com/company/denmark-holding/