As a Dane that's pretty terrifying to me (see Nokia and Nortel)
Novo Nordisk $35 billion in revenue.
GDP of Denmark:$400 billion.
Their revenue is roughly 9% of GDP.
There's a lot of pensions and savings tied up in Novo stock, so a potential downturn would have a catastrophic impact on the danish citizens
The danish economy is, to a large extend, dependent on the stock price of Novo, not its revenue
Novo Nordisk makes 17% of Danish stock index. Vestas and DSV are both 10%
(Foreign investors' ownership of listed Danish shares is over 50%, so I assume the situation is similar to NN when you remove the foundation owned stocks)
If a country's largest company based on market cap is bigger than the next 50 companies combined, is the most popular stock among the countries retail investors, and is the current sole driver of economic growth in said country, that's a significant risk
Making a comparison between the value generated in a country compared to the total price of a company is a way to illustrate how massive the company actually is - same as when making a comparison to how many years I'd need to work to have earned as much as Jeff Bezos net worth