IC packagers Advanced Semiconductor Engineering (ASE) and Siliconware Precision Industries (SPIL) have reported sequential decreases of 5.4% and 4.2% respectively in November consolidated revenues.

ASE's November consolidated revenues reached NT$20.27 billion (US$810 million), up 4% on year. ASE's consolidated sales consist of revenues generated by EMS subsidiary Universal Scientific Industrial (USI).

ASE's core assembly test and material (ATM) business posted revenues of NT$12.71 billion in November 2015, down 4.1% sequentially and 12.2% from a year earlier.

ASE said previously that the company's core business would suffer a sequential fall in utilization rate in the fourth quarter, due to ongoing inventory adjustments among its clients. However, utilization rate of ASE's EMS operation would increase thanks to robust shipments of SiP (system-in-package) products.

SPIL's November consolidated revenues reahced NT$6.77 billion, down 6.1% from a year ago. SPIL's revenues for October and November totaled NT$13.83 billion.

SPIL estimated previously consolidated revenues would stay flat or drop by up to 6% sequentially to between NT$18.8 billion and NT$20 billion in the fourth quarter of 2015.