https://bl.ocks.org/denjn5/f059c1f78f9c39d922b1c208815d18af

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        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "CIBC",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 1},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "Coke",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 0},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 1},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "Eurocash",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 1},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "Farmer's Insurance",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 0},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 1},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "GEMS",
     "children": [
        {"name": "Qualified Lead", "size": 1},
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 0},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
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        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "Hyperion",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 1},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "GSK",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 0},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 1},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "KRD",
     "children": [
        {"name": "Qualified Lead", "size": 1},
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 0},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "Magellan",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 0},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 1},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "Northwell",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 0},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 1},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "Origin ENergy",
     "children": [
        {"name": "Qualified Lead", "size": 1},
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 0},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "RBS",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 0},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 1},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "Oxfam",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 0},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 1}
             ]
            }       
           ]
          }    
         ]
        } 
       ]
      }
     ]
    }
   ]
  },
{
     "name": "VWFS",
     "children": [
{
     "name": "Qualified Lead",
     "children": [
      {"name": "Opportunity Created", "size": 1},
{
     "name": "Opportunity Created",
     "children": [
      {"name": "Solution Proposed", "size": 0},
{
     "name": "Solution Proposed",
      "children": [
        {"name": "POC", "size": 0},
{ 
     "name": "POC",
       "children": [
         {"name": "Legal/IT", "size": 0},
{
     "name": "Legal/IT", 
      "children": [
        {"name": "Closed - Won", "size": 0}
               ]
              }       
             ]
            }    
           ]
          } 
         ]
        }
       ]
      }
     ]
    }
   ]
  }
 ]
}

var width = 500;  
var height = 500;
var radius = Math.min(width, height) / 2;
var color = d3.scaleOrdinal(d3.schemeCategory20b);
      
var g = d3.select('svg')  
    .attr('width', width)  
    .attr('height', height)
    .append('g')  
    .attr('transform', 'translate(' + width / 2 + ',' + height / 2 + ')');
      
var g = d3.select('svg')  
    .attr('width', width)  
    .attr('height', height)  
    .append('g')
    .attr('transform', 'translate(' + width / 2 + ',' + height / 2 + ')');  
      
var partition = d3.partition()
    .size([2 * Math.PI, radius]);

d3.json("data.json", function(error, nodeData) {
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});     
      
function computeTextRotation(d) {
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return (angle < 120 || angle > 270) ? angle : angle + 180;
}
      
      
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</body>

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