Further details were not immediately available.
Shares in Socep closed unchanged at 0.15 lei ($0.05/0.04 euro) on the Bucharest Stock Exchange on Tuesday. No Socep shares were traded by 0815 GMT on Wednesday.
The port operator reported a net profit of 66,700 lei in the first-half of 2009 versus 5.4 million lei in the year-ago period.
(1 euro = 4.1946 Romanian lei)