The Swede became the club's first summer signing this week.
The move looks a good one on paper for Leeds, considering the form of the goalscoring forward, and it seems that his former club are very happy with the deal.
Speaking to Aftonbladet in Sweden this week Kalmar’s sporting director Thomas Andersson Borstam would not give away the fee Leeds paid for the player, which the paper rumoured to be in the region of 20 million Swedish Krona (£1.75 million), but was clearly pleased with the deal:
“I understand the interest, but with respect for everyone involved, we will not reveal the fee.
“But we are very happy with the deal.”
He also made it clear that Leeds were not alone in their pursuit of the player – suggesting he also had offers to move to France this summer:
“Leeds has been there from the beginning, but there were also a few French clubs in the picture for some time.”
Antonsson arrives at Leeds in a good spell of form in Swedish football. He has scored 13 goals in 17 games in league and cup competitions for Kalmar since the turn of the year and Leeds United will be hoping he can fill the gap, as well as be an improvement on, the hole left by the departure of Italian enigma Mirco Antenucci this summer.