Stocks making the biggest moves after hours: Qualtrics, W.R. Berkley, Discover Financial and more

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Check out the companies making headlines after the bell:

Discover Financial

Cadence Design Systems

Qualtrics

AmazonNew York Post that it’s freezing hiring in its Amazon Web Services division.

Packaging Corp of America

Zions Bancorporation

W.R. Berkley Corp

See which stocks are posting big moves after the bell.