Quanta showed a 32 percent rise in June sales, Gigabyte revenues were up by 14 percent, while Compal showed a revenue rise of 18 percent in the period.
Gigabyte's main business line is in motherboards, while Quanta is a significant manufacturer of PCs.
The news is likely to cheer up the entire PC supply chain and will provide some encouragement to chip manufacturers, to e-tailers and to retailers.
Taiwanese corporations are required by law to provide monthly revenue figures but aren't required to show profit margins.
In other news, Digitimes reports that Globalfoundries (GloFo) has struck a deal with Shanghai based Fudan to make semiconductors aimed at AI and Big Data apps.
The process used is GloFo's 22 nanometre FD-SOI process.