MANNHEIM (dpa-AFX) - Bilfinger Group CEO Thomas Schulz has purchased shares in the company for around half a million euros. Schulz bought papers of the Mannheim-based SDax group for a total of just under 517,000 euros between Wednesday and Friday, according to mandatory announcements on Friday. Starting from an annual high of 39.98 euros at the end of April, the share price had come under pressure in recent months. However, at the close of trading before the weekend, the industrial services provider's share price was 32.44 euros, noticeably higher than the level at the beginning of the year at just over 27 euros./men