To keep track of the flurry of mergers, acquisitions, and partnerships initiated by disruptors like Amazon, CVS, Optum, Humana, Walgreens, and Walmart over the past three years, we assembled a “cheat sheet” with key dates and descriptions for 52 deals that Leading Health System executives should be familiar with. We’ve also marked up major deals (larger than $1B) and drawn connections between related deals including roll-up acquisitions.