Pie chart

<!DOCTYPE html>
<meta charset="utf-8">
<html>
  <head>
    <script src="https://d3js.org/d3.v4.min.js"></script>
  </head>
  <body>
  <div id="chart"></div>
  <script>

dataset = [{"Company":"A", "value":131}, 
    {"Company":"B", "value":74}, 
    {"Company":"C", "value":97}];

var width = 360;
        var height = 360;
        var radius = Math.min(width, height) / 2;

var color = d3.scaleOrdinal(d3.schemeCategory20b);

var svg = d3.select('#chart')
          .append('svg')
          .attr('width', width)
          .attr('height', height)
          .append('g')
          .attr('transform', 'translate(' + (width / 2) +
            ',' + (height / 2) + ')');

var arc = d3.arc()
          .innerRadius(0)
          .outerRadius(radius);

var pie = d3.pie()
          .value(function(d) { return d.value; })
          .sort(null);

var path = svg.selectAll('path')
          .data(pie(dataset))
          .enter()
          .append('path')
          .attr('d', arc)
          .attr('fill', function(d) {
            return color(d.data.Company);
          });
</script>
</body>
</html>

https://d3js.org/d3.v4.min.js