Kilmarnock manager Derek McInnes has said Charlie McArthur was determined to join Newcastle United.
The 17-year-old defender brushed aside numerous offers to sign with Newcastle on Wednesday.
McInnes said: "We understood, like all Scottish clubs, that we're vulnerable to the richest league in the world with all the money that is available there.
"A bigger club has come along and identified he's a good player, which he is. The move was something that Charlie was keen on so once we established that with his agents, then it was all about us getting the fee that we wanted, which thankfully we did.
"You can see exactly why Newcastle would want to bring him into their system and we'll look out for him and hope he does well there. He will always be welcome back at Rugby Park."