The lawsuit names Texas Instruments, AMD and Intel, accusing the companies of allowing tiny computer chips they produced to reach - what the plaintiffs refer to as - hostile countries through weak oversight of global supply chains.
The companies did not immediately respond to an Iran International request for comment.
Filed by Watts Law Firm LLP and BakerHostetler LLP, the case represents Ukrainian civilians and families who say they lost loved ones or suffered serious injuries during drone and missile attacks. The plaintiffs are seeking damages for wrongful death, physical injury and psychological trauma.
The chips, they added, were later found in drones and missiles used by Russia and Iran in strikes that killed and injured civilians in Ukraine.
Iran has supplied drones and other military support to Russia since Moscow’s full-scale invasion of Ukraine. Tehran and Moscow are both heavily sanctioned by the United States, in curbs aimed at sapping their ability to project military power.
The complaint alleges the companies failed to take reasonable steps to prevent their products from reaching sanctioned actors, despite years of public warnings from governments, journalists and international watchdogs.
US export control laws are designed to stop sensitive technology from being diverted into foreign weapons programs and the lawsuit claims those safeguards were ignored.
According to the filing, American-made chips were identified in Iranian-manufactured Shahed drones and in Russian missiles used to strike residential areas and civilian infrastructure in Ukraine.
The Shahed has helped define the Ukrainian battlespace and the United States announced this month it had copied elements of the kamikaze drone and deployed it to the Middle East, in a move which drew pride and mockery in Tehran.
Plaintiffs argue the companies continued selling chips through distributors and online channels they knew were vulnerable to diversion. The complaint says sales continued even after reports showed US technology repeatedly appearing in Iranian and Russian weapons systems.
The companies named in the lawsuit have previously said they comply with US export controls and sanctions and do not sell products directly to Iran or Russia. The defendants have not yet responded publicly to the specific allegations in the new lawsuit and its merits have not yet been tested in court.
The lawsuit does not allege the companies intentionally supplied weapons programs but argues they knowingly failed to prevent foreseeable harm caused by the misuse of their technology.
Citing Texas tort law covering negligence, gross negligence and wrongful death, the lawsuit also argues that violations of US export control and sanctions laws automatically constitute negligence under state law.
The filing cites multiple reports documenting how American electronics ended up in Iranian and Russian weapons. Investigations by US and international research organizations have previously found that a large share of components recovered from Iranian drones used in Ukraine originated from US companies.
The complaint also points to internal warnings.
In the case of Texas Instruments, shareholders reportedly raised concerns about chips appearing in sanctioned markets but the company maintained that full traceability of its products was not achievable. Plaintiffs argue that response showed a failure to strengthen safeguards despite known risks.
David Albright, a prominent physicist and nuclear proliferation expert, posted to X that "Texas instruments has sold its goods to China and it knows they end up in Russian Shahed drones and other military systems."