score:1

Accepted answer

You can find them into yAxis.tickPositions or yAxis.ticks:

Highcharts.chart('container', {
  chart: {
    events: {
      load: function() {
        var chart = this,
          yAxis = chart.yAxis[0];

        console.log(yAxis.tickPositions, yAxis.ticks);
      }
    }
  },
  series: [{
    data: [
      439,
      525,
      571,
      696,
      970,
      119,
      137,
      154
    ]
  }],
});

Demo:


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