Deutsche Boerse was searched as part of European Union investigations into financial derivatives and is fully cooperating with authorities, a company spokesperson said.
"We do not comment on ongoing investigations," added a spokesperson for the German stock exchange operator today.
The European Commission said it had conducted unannounced inspections at financial services companies in two member states over possible breaches of antitrust regulations, but did not specify which firms or how many.
It was not immediately clear if Deutsche Boerse's main competitor Euronext, which runs stock markets in various cities including Paris and Amsterdam, was also part of the investigation.
The company did not immediately return phone calls and emailed requests for comment.
Unannounced probes are a preliminary step into suspected anticompetitive practices but does not mean the firms are guilty, and there is no legal deadline to finish inquiries into such conduct, according to the EU.
If the inspections reveal violations of EU antitrust laws, it could trigger formal investigations and significant fines for the companies involved.
