UPDATE 1-Holcim German cartel fine cut to 15 mln euros

* German court reduces total fine on 5 companies

* Case dates back to 2003

ZURICH, June 29 (Reuters) - Holcim (HOLN.VX), the world's second-largest cement maker, said on Monday a German court had reduced a fine by the cartel office to 14.6 million euros ($20.44 million) relating to a cartel with four other companies.

Holcim, one of five companies originally fined in 2003 for keeping prices artificially high, would examine its options regarding the fine, which was lowered from 74 million euros, a company spokesman said.

A spokesman for a court in Duesseldorf, Germany, said the companies' total fines would be reduced to 330 million euros from the original 660 million euros because of gaps in the chain of evidence. Other firms involved include HeidelbergCement (HEIG.DE), Dyckerhoff (DYKG.DE), Lafarge (LAFP.PA) and Schwenk. ($1=.7143 euros) (Reporting by Jason Rhodes; editing by Mike Nesbit)