Data Storage Co Seagate Technology, With Operational HQs in Cupertino, CA, Posted a Dec 2017 Quarter Increase in Pretax Income of a Robust 20% ....................................................................................... Its Dec 2017 Quarter Net Income Decline Was All Due To a $208 Mil Tax Earnings Charge Related To Reflecting the Decline in the Value of Its Deferred Income Tax Assets Required By the Trump Tax Bill