Fortescue's first-half profit after tax was $4.08 billion, up from $2.45 billion a year earlier. This was in line with a consensus of $4.09 billion from 10 analysts compiled by research firm Vuma Financial.
The global miner is battling to restore its reputation around how it manages human rights after it destroyed two ancient rock shelters sacred to Australian Aboriginal people for an iron ore mine last May.
The S&P/ASX 200 index was up 1.1% at 6,725.70 by 2350 GMT, its best session since Jan. 19, after ending about 2% lower on Thursday. But it was on track to rise 1.7% in January, its fourth straight monthly gain.