This document discusses how blockchain could transform the insurance industry by allowing for more efficient data sharing and automated processes. It describes the key activities of an insurance company and how each could be improved with blockchain. For example, blockchain could create a shared data registry so that customer and asset data only needs to be entered once rather than re-entered for each party. This would reduce errors and fraud. Smart contracts could also automate claims processing and payments. The document considers how new blockchain-based insurance models like peer-to-peer or parametric insurance could disrupt traditional insurers if they do not adapt.