The estimated value of the guarantees is EUR51 million.
Company officials declined to comment.
La Fantana has been present on the Romanian market for over ten years and sells bottled water for water coolers. The company has around 500 employees in Romania and two factories, in Bucharest and Sibiu.
In May 2007, Poland-based investment fund Innova Capital bought 92% in La Fantana from investment fund Oresa Ventures and individual shareholder Cristian Amza for EUR35 million. Innova Capital currently owns 75.5% in La Fantana.
Last year, La Fantana posted a 21% increase in turnover, to RON101.2 million (EUR22.7 million) and a net profit of RON11.4 million (EUR2.56 million), up 17.7% compared to 2011.