SOFIA (Bulgaria), February 19 (SeeNews) – Bulgarian software developer Sirma Group Holding is preparing an initial public offering (IPO) on the Bulgarian bourse, aiming to raise its capital to 65.8 million levs ($38.4 million/33.6 million euro) from 49.8 million levs to accelerate growth and expand its presence on foreign markets, the brokerage that will manage the IPO said on Thursday.