S&P Global Ratings gave a slight upgrade to GulfMark Offshore after the company last week pulled out of a tender offer to buy back its unsecured debt below face value.
S&P said the its corporate credit rating on the US-based offshore vessel owner was raised to 'CCC-' from 'CC'. The rating outlook remains negative.
The senior unsecured notes were also upgraded to 'CCC' from 'CC'.
