By Mauro Orru

Deutsche Boerse AG said late Thursday that a group of Iran judgment creditors filed a complaint in the United States District Court for the Southern District of New York naming its subsidiary Clearstream Banking S.A.

The operator of the German stock exchange said the complaint also names Iran, the Central Bank of Iran and other financial institutions.

The complaint requires Clearstream to surrender assets alleged to be attributed to Bank Markazi, Deutsche Boerse said.

"Clearstream considers any claims for damages against it in this context to be unfounded and will take all necessary and appropriate measures to decisively defeat such claims," Deutsche Boerse said.

Iran judgment creditors are a group of entities that were awarded around $8.7 billion in damages based on terroristic acts attributed to Iran and other entities in 2014. The group has brought in actions under the terrorism exception to the U.S. Foreign Sovereign Immunities Act.

Write to Mauro Orru at mauro.orru@wsj.com; @MauroOrru94