BEIJING - The combined profits of China's State-owned enterprises and state holdings companies rose 12.8 percent year-on-year in 2011 to 2.26 trillion yuan ($356.91 billion), the Ministry of Finance said Wednesday.

The growth slowed from the 13.7-percent increase in the January-November period of 2011, and was sharply down from the 37.9-percent rise registered in 2010.

On a monthly basis, the companies' profits surged 57.3 percent in December from November, the ministry said in a statement on its website.

Business revenue of these companies totaled 36.79 trillion yuan last year, up 21.5 percent from the previous year, it said.

According to the statement, these companies reported aggregate costs of 34.90 trillion yuan last year, up 22.4 percent year-on-year.

Some industries, including the chemical, construction materials, electronic products, and non-ferrous metals industries, saw big increases in their profits in 2011, but others, including the transportation, steel, medical and power generation industries, posted heavy losses.