Earnings before interest, depreciation and amortisation (EBITDA) in the six-month period came in at 101.1 million euros ($111.8 million) after 138.3 million last year, the group said.

Revenue in the period fell 5.1% to 490.3 million euros.

The company reaffirmed its full-year outlook of a stable revenue and an EBITDA margin of 20%-25%.

(Reporting by Bartosz Dabrowski in Gdansk; Editing by Kim Coghill)