This document analyzes the financial statements of Amazon, Apple, and Alibaba to evaluate their profitability. It calculates key profitability metrics like return on equity (ROE), return on assets (ROA), and return on net assets (RONA) for each company from 2012-2016. The document also breaks down ROA and ROE into their components to better understand the drivers of profitability. Overall, Apple and Alibaba have higher profitability numbers than Amazon, though Amazon's numbers are improving over time as their investments start generating returns.