The city-based, privately-held Calibre was established in 1984 and manufactures a range of specialty chemicals falling into two product lin...

The stock has appreciated 60% in the past three months in anticipation of a transaction.

If successful, this will be the second KKR investment in as many months.

Everstone joins existing institutional investor KKR, who first invested in Slayback with a $60 million commitment in December 2016.