I’m sorry, but anyone who sees this as an issue should be put on...

I’m sorry, but anyone who sees this as an issue should be put on ignore for being dim. Even if he sold 10% its not a sign of a problem.

It’s the equivalent of someone selling their car tyres, and an observer making the conclusion that the car is a lemon.

When should someone sell 1.5% of their share holding? Do they need to ask permission first or should they just never sell?

If anything this should be taken as a hugely positive sign. He is saying, “I believe in this company enough that I’m going to still hold 98.5% of what I own.”