curl --request GET \
  --url https://api.tilt.io/api/v1/custom/org/{organization_uuid}/reports/holdings/constituents/ \
  --header 'X-Api-Key: <api-key>'

{
  "count": 123,
  "next": "http://api.example.org/accounts/?page=4",
  "previous": "http://api.example.org/accounts/?page=2",
  "results": [
    {
      "symbol": "<string>",
      "total_market_value": "<string>",
      "total_quantity": "<string>",
      "num_clients": 123
    }
  ]
}