The 'Use Somebody' group were forced to axe their entire tour of America because of frontman Caleb Followill's ongoing health issues.
Their insurers Lloyds of London will reportedly have to pay up to $15 million (£9.14 million) to major venues who have lost vast sums of money after the cancellation, according to The Insurance Insider.
Meanwhile, agent Dennis Arfa, who manages the likes of Metallica and Billy Joel, has told Rolling Stone that he is suspicious over the reasons behind the band's cancellation.
"Well, I mean, it tells me stuff is goin' on. Something's not right, obviously," he said.
"Exhaustion is a label. It doesn't tell you the detail - just says 'exhaustion'. Exhaustion usually means you have issues going on beyond just being physically tired. It's a convenient label."
Caleb Followill has reportedly been urged by his bandmates to enter rehab.
Watch the video for Kings of Leon's 'Back Down South' below: