This pie chart visualizes company metrics by aggregating the total values of six distinct fields—Revenue, Profit, Customers, Expenses, EmployeeCount, and Productivity Index—from a CSV file fetched from a GitHub gist. The data is loaded using `d3.csv`, and the sums are calculated with `d3.sum`. The chart is rendered as an SVG, using `d3.pie` to generate the arc data and `d3.arc` to draw each sector, which are then colored with `d3.scaleOrdinal` and the `d3.schemeCategory10` palette. Text labels are positioned at each arc’s centroid.