The average net profit of all companies listed on the Shenzhen Stock Exchange fell 11.52 percent in 2012, the first drop since 2009, the China Securities Journal reported on Monday.

However, the revenue of Shenzhen Stock Exchange-listed companies in 2012 rose 4.71 percent year-on-year, according to its own report.

In addition, 770 companies listed on the Shenzhen Stock Exchange realized a net profit growth in 2012, accounting for 50.07 percent of all those listed there.

However, the remaining 768 Shenzhen Stock Exchange-listed companies all experienced a fall in profits in the same period, the report said.