Unicorns by investor Try 3

<!DOCTYPE html>
<head>
  <meta charset="utf-8">
  <script src="jquery-3.2.1.min.js"></script>  
  <style>
    body { margin:0;position:fixed;top:0;right:0;bottom:0;left:0; }
    .axis .domain {
  display: none;
	}
  </style>
</head>

<body>
<select id="menu">

</select>
  
<svg width="960" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
  
var svg = d3.select("svg"),
    margin = {top: 20, right: 20, bottom: 30, left: 40},
    width = +svg.attr("width") - margin.left - margin.right,
    height = +svg.attr("height") - margin.top - margin.bottom,
    g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");

d3.csv("unicorns.csv", function(error, data) {
			if (error) return error;
    
    data = d3.nest()
    	.key(function(d) { return d.investorWriteInName })
    	.key(function(d) { return d.industrySegment })
    	.entries(data);

// Sort the bars so they show up tallest to shortest
//  data.sort(function(a, b) { return b.total - a.total; }); 
/*    
   // Set scales
var xScale = d3.scaleBand()
    .rangeRound([0, width])
    .paddingInner(0.05)
    .align(0.1);

var yScale = d3.scaleLinear()
    .rangeRound([height, 0]);

var colorScale = d3.scaleOrdinal()
    .range(["#e6194b", "#3cb44b", "#ffe119", "#0082c8", "#f58231", "#911eb4", "#46f0f0", "#f032e6", "#d2f53c", "#d2f53c", "#fabebe", "#008080", "#e6beff", "#aa6e28", "#fffac8", "#800000", "#aaffc3", "#808000", "#ffd8b1", "#808080", "#FFFFFF", "#000000"
]);

xScale.domain(data.map(function(d) { return d.investorWriteInName; }));
  yScale.domain([0, d3.max(data, function(d) { return d.values.length; })]).nice();
  colorScale.domain(keys);

//Append things
  g.append("g")
    .selectAll("g")
    .data(d3.stack().keys(keys)(data))
    .enter().append("g")
      .attr("fill", function(d) { return colorScale(d.key); })
    .selectAll("rect")
    .data(function(d) { return d; })
    .enter().append("rect")
      .attr("x", function(d) { return xScale(d.data.name); })
      .attr("y", function(d) { return yScale(d[1]); })
      .attr("height", function(d) { return yScale(d[0]) - yScale(d[1]); })
      .attr("width", xScale.bandwidth());

g.append("g")
      .attr("class", "axis")
      .attr("transform", "translate(0," + height + ")")
      .call(d3.axisBottom(xScale));

g.append("g")
      .attr("class", "axis")
      .call(d3.axisLeft(yScale).ticks(null, "s"))
    .append("text")
      .attr("x", 2)
      .attr("y", yScale(yScale.ticks().pop()) + 0.5)
      .attr("dy", "0.32em")
      .attr("fill", "#000")
      .attr("font-weight", "bold")
      .attr("text-anchor", "start")
      .text("Items");
 
  var legend = g.append("g")
      .attr("font-family", "sans-serif")
      .attr("font-size", 10)
      .attr("text-anchor", "end")
    .selectAll("g")
    .data(keys.slice().reverse())
    .enter().append("g")
      .attr("transform", function(d, i) { return "translate(0," + i * 20 + ")"; });
 
  legend.append("rect")
      .attr("x", width - 19)
      .attr("width", 19)
      .attr("height", 19)
      .attr("fill", colorScale);

legend.append("text")
      .attr("x", width - 24)
      .attr("y", 9.5)
      .attr("dy", "0.32em")
      .text(function(d) { return d; });

// update
    
    function update(data) {
      var item = d3.select("#menu").property("value");
      var itemData = getItemData(data, item);
			console.log(itemData);
    }
    
    
    // main
    d3.select("#menu")
			.on("change", function(d) {
				update(data);
			});
    
    
  */
</script>
</body>

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