It was MiniScribe, from the court documents:
In mid-December 1987, Miniscribe's management, with Wiles' approval and Schleibaum's assistance, engaged in an extensive cover-up which included recording the shipment of bricks as in-transit inventory. To implement the plan, Miniscribe employees first rented an empty warehouse in Boulder, Colorado, and procured ten, forty-eight foot exclusive-use trailers. They then purchased 26,000 bricks from the Colorado Brick Company.
On Saturday, December 18, 1987, Schleibaum, Taranta, Huff, Lorea and others gathered at the warehouse. Wiles did not attend. From early morning to late afternoon, those present loaded the bricks onto pallets, shrink wrapped the pallets, and boxed them. The weight of each brick pallet approximated the weight of a pallet of disk drives. The brick pallets then were loaded onto the trailers and taken to a farm in Larimer County, Colorado.
Miniscribe's books, however, showed the bricks as in-transit inventory worth approximately $4,000,000. Employees at two of Miniscribe's buyers, CompuAdd and CalAbco, had agreed to refuse fictitious inventory shipments from Miniscribe totalling $4,000,000. Miniscribe then reversed the purported sales and added the fictitious inventory shipments into the company's inventory records.