Scorpio Tankers is looking to take on another piece of unsecured debt with the issuance of its fourth "baby bond" as a public company.

The issuance of five-year notes is nominally earmarked for $25m, but is likely to be larger if market conditions prove suitable, with a target coupon rate at 7%.

The deal, announced in a securities filing on Tuesday, is led by US investment bank B Riley FBR.