June 18 (SeeNews) - A total of 43,961,878 shares of poultry producer Gradus [BUL:GR6T] were subscribed for at the minimum price of 1.8 levs ($1.07/0.92 euro) apiece on the first day of the company's initial public offering (IPO) on the Bulgarian bourse, exceeding the succeess threshold, bourse data showed on Monday.