Like all lenses from other manufacturers also divides this Sigma lens EXIF lens ID with other lenses.
So that the tools can determine the lens only on the basis of additional parameters such as min / MaxFocalLength.
183 Canon EF 100-400mm f / 4.5-5.6L IS or Sigma Lens
183 Sigma 150mm f / 2.8 EX DG OS HSM APO Macro
After my notice that Sigma will be displayed correctly Version 9:35 at least widespread ExifTool.
183 Sigma 105mm f / 2.8 EX DG OS HSM Macro