Total operating revenues went up 4% on the year to 3.5 billion denars in the January-September period, Fersped said in an interim financial statement on Monday.
Revenues from domestic sales rose by 5% to 3.3 billion denars, while sales abroad fell 18% to 128.5 million denars in the period under review.
Fersped's total operating costs rose 4% year on year in the first nine months of 2022, reaching 3.4 billion denars.
Fersped was established in 1968 as a state-owned company and was privatised in 1995.
(1 euro = 61.73 denars)