Workday to buy Adaptive Insights for $1.55 billion (Reuters) - Workday Inc (WDAY.O) said on Monday it would buy Adaptive Insights Inc in a deal valued at $1.55 billion, paying a hefty premium for the cloud-based company that was expected to go public this week. Adaptive Insights, a provider of cloud platform for business planning, was expected to raise up to $123 [...]