In a press release, the Treasury Department said the sanctions were in response to Iran’s claimed launch of a Simorgh satellite on Thursday.
"OFAC sanctioned six Iran-based subordinates of Shahid Hemmat Industrial Group (SHIG), an entity central to Iran’s ballistic missile program," the release stated.
Each of the six entities is responsible for developing, manufacturing or producing components that can be used in ballistic missiles or launchers, according to OFAC. SHIG is already under US, EU and UN sanctions.
On July 18, the United States imposed sanctions on 18 entities and individuals over their alleged ties to Iran's military and ballistic missile program.
Moreover, on Thursday, US Senate approved a bill that would impose new sanctions on Russia, Iran and North Korea. The bill now has to be either signed or vetoed by US President Donald Trump.
Tehran maintains its ballistics program complies with the UN resolution, which called on Iran to refrain from activity related to ballistic missiles that could deliver nuclear weapons. Following Iran's latest test-launch in February, Iranian Foreign Minister Javad Zarif said the test did not violate the resolution because the missiles are not produced to carry nuclear warheads.