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.
Fortescue is also undertaking a detailed review of construction costs at its $2.6 billion iron bridge project, which is due to produce first ore in the first-half of 2022.
PKKP also noted the appointment of Rio's new chief executive officer, Jakob Stausholm, and said it hoped that discussions between both parties would continue in a positive direction.
Tech stocks continued their winning streak, closing at a record level. Afterpay was the biggest gainer in the index, marking a record closing level for the fourth session in a row.
A parliamentary inquiry has called on Rio to pay restitution to Indigenous Australians affected by the destruction and also fully reconstruct the rock shelters.