The three companies were admitted on the stock exchange’s alternative trading system earlier this month.
Brokerage house Tradeville will be market maker for the three companies, the bourse said in a statement.
Deutsche Telekom is the largest owner of Greek telecom company OTE, which holds 54% in Romanian hard line telephony operator Romtelecom.
E.ON, one of the world’s largest utility companies, runs two companies on the local market, namely E.ON Moldova and E.ON Gaz Romania.