incurred 'to' or 'by'

[Helissax]

Please tell me which sentence is more correct having in mind that its meaning is - 'The losses inflicted to the companies due to the strike already amount to over $ 30 mln.':

The losses incurred to the companies due to the strike already amount to over $ 30 mln.

or

The losses incurred by the companies due to the strike already amount to over $ 30 mln

[rlfwood]

"incurred by"