The FBI and other US offices have looked through Florida premises utilized by Chinese installment terminal supplier Pax Technology.
The hunt had been "in assistance of a government examination", the FBI said.
US media reports recommend it was incited by worries about the security of Pax Technology items.
The organization said no charge of bad behavior had been made. "Pax Technology approaches security extremely in a serious way," it said.
"As usual, Pax Technology is effectively checking its current circumstance for potential dangers.
"We stay focused on giving secure and quality programming frameworks and arrangements."
A FBI official told BBC News it had looked through three offices in Jacksonville, Florida.
"The FBI Jacksonville division, in association with Homeland Security Investigations, Customs and Border Protection, Department of Commerce, and Naval Criminal Investigative Services, and with the help of the Jacksonville Sheriff's Office, executed a court-approved pursuit in facilitation of a government examination," it said.
"The examination stays dynamic and progressing and no extra data can be affirmed as of now."
The news hit the organization's portions hard - Pax Global Technology fell more than 43% on Wednesday, in exchanging Hong Kong.