Ann: Change of Director's Interest Notice, page-5

Nope. He held 4,040,000 (40k of which were held for his son), now he holds 2,040,000 (40k of which are held for his son).

He sold 2 mil of his own.

Yes he holds a lot more through trusts etc, and sure, there probably is a reasonable explanation (could be any reason really), but given the lack of any detail it feel more like an opportunistic sale than a reluctant sale. 

Make of it what you will. If it was opportunistic he did leave $600k on the table!