Obviously they didn't have a say in this, that's how the stock market works.
And no, money is exactly why these laws exists in the first place. Nintendo is one of the most important companies in the Japanese economy and the laws I'm talking about are there to prevent hostile take overs of big important companies like Nintendo. The regulations are very strict. There is no way Nintendo would agree to sell to the Saudis and even if they did the government would probably not allow it.
With a 5% share the Saudis have zero influence on anything abd therefore nothing with their games will change.
But they still get a share of profits from Nintendo games, right? Also, the link was false info?