Seagate said the "second request" from the FTC would extend the Hart-Scott-Rodino waiting period until 30 days after the company complies with the request.
Seagate said in a filing that the FTC request pertains to its asset purchase agreement with Samsung and the related share issue.
Seagate had agreed to issue about 45.2 million shares - valued at $687.5 million - to Samsung Electronics as part of the deal.