diff --git a/schema/definitions/0.8.0/schema/fmu_results.json b/schema/definitions/0.8.0/schema/fmu_results.json
index fe9cc24d0..6f19eead7 100644
--- a/schema/definitions/0.8.0/schema/fmu_results.json
+++ b/schema/definitions/0.8.0/schema/fmu_results.json
@@ -191,6 +191,9 @@
         {
           "$ref": "#/$defs/TimeSeriesData"
         },
+        {
+          "$ref": "#/$defs/TransmissibilitiesData"
+        },
         {
           "$ref": "#/$defs/VelocityData"
         },
@@ -8864,6 +8867,311 @@
       "title": "TracklogEvent",
       "type": "object"
     },
+    "TransmissibilitiesData": {
+      "description": "The ``data`` block contains information about the data contained in this object.\nThis class contains metadata for transmissibilities.",
+      "properties": {
+        "alias": {
+          "anyOf": [
+            {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "title": "Alias"
+        },
+        "base": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/Layer"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null
+        },
+        "bbox": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/BoundingBox3D"
+            },
+            {
+              "$ref": "#/$defs/BoundingBox2D"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "title": "Bbox"
+        },
+        "content": {
+          "const": "transmissibilities",
+          "enum": [
+            "transmissibilities"
+          ],
+          "title": "Content",
+          "type": "string"
+        },
+        "description": {
+          "anyOf": [
+            {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "title": "Description"
+        },
+        "domain_reference": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/DomainReference"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "examples": [
+            "msl",
+            "sb",
+            "rkb"
+          ]
+        },
+        "format": {
+          "examples": [
+            "irap_binary"
+          ],
+          "title": "Format",
+          "type": "string"
+        },
+        "geometry": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/Geometry"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null
+        },
+        "grid_model": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/GridModel"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null
+        },
+        "is_observation": {
+          "title": "Is Observation",
+          "type": "boolean"
+        },
+        "is_prediction": {
+          "title": "Is Prediction",
+          "type": "boolean"
+        },
+        "layout": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/Layout"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "examples": [
+            "regular",
+            "cornerpoint"
+          ]
+        },
+        "name": {
+          "examples": [
+            "VIKING GP. Top"
+          ],
+          "title": "Name",
+          "type": "string"
+        },
+        "offset": {
+          "default": 0.0,
+          "title": "Offset",
+          "type": "number"
+        },
+        "spec": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/CPGridPropertySpecification"
+            },
+            {
+              "$ref": "#/$defs/CPGridSpecification"
+            },
+            {
+              "$ref": "#/$defs/FaultRoomSurfaceSpecification"
+            },
+            {
+              "$ref": "#/$defs/PointSpecification"
+            },
+            {
+              "$ref": "#/$defs/CubeSpecification"
+            },
+            {
+              "$ref": "#/$defs/PolygonsSpecification"
+            },
+            {
+              "$ref": "#/$defs/SurfaceSpecification"
+            },
+            {
+              "$ref": "#/$defs/TableSpecification"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "title": "Spec"
+        },
+        "stratigraphic": {
+          "title": "Stratigraphic",
+          "type": "boolean"
+        },
+        "stratigraphic_alias": {
+          "anyOf": [
+            {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "title": "Stratigraphic Alias"
+        },
+        "table_index": {
+          "anyOf": [
+            {
+              "items": {
+                "type": "string"
+              },
+              "type": "array"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "examples": [
+            [
+              "ZONE",
+              "REGION"
+            ]
+          ],
+          "title": "Table Index"
+        },
+        "tagname": {
+          "anyOf": [
+            {
+              "type": "string"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "examples": [
+            "ds_extract_geogrid",
+            "ds_post_strucmod"
+          ],
+          "title": "Tagname"
+        },
+        "time": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/Time"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null
+        },
+        "top": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/Layer"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null
+        },
+        "undef_is_zero": {
+          "anyOf": [
+            {
+              "type": "boolean"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "title": "Undef Is Zero"
+        },
+        "unit": {
+          "default": "",
+          "examples": [
+            "m"
+          ],
+          "title": "Unit",
+          "type": "string"
+        },
+        "vertical_domain": {
+          "anyOf": [
+            {
+              "$ref": "#/$defs/VerticalDomain"
+            },
+            {
+              "type": "null"
+            }
+          ],
+          "default": null,
+          "examples": [
+            "depth",
+            "time"
+          ]
+        }
+      },
+      "required": [
+        "content",
+        "name",
+        "stratigraphic",
+        "format",
+        "is_observation",
+        "is_prediction"
+      ],
+      "title": "TransmissibilitiesData",
+      "type": "object"
+    },
     "User": {
       "description": "The ``user`` block holds information about the user.",
       "properties": {
diff --git a/src/fmu/dataio/_model/data.py b/src/fmu/dataio/_model/data.py
index 885f35e85..e9002835c 100644
--- a/src/fmu/dataio/_model/data.py
+++ b/src/fmu/dataio/_model/data.py
@@ -654,6 +654,7 @@ class AnyData(RootModel):
             ThicknessData,
             TimeData,
             TimeSeriesData,
+            TransmissibilitiesData,
             VelocityData,
             VolumesData,
             WellPicksData,
diff --git a/tests/test_units/test_contents.py b/tests/test_units/test_contents.py
index 2d8de6437..3e8753380 100644
--- a/tests/test_units/test_contents.py
+++ b/tests/test_units/test_contents.py
@@ -280,10 +280,15 @@ def test_content_timeseries(dataframe, globalconfig2):
     assert meta["data"]["content"] == "timeseries"
 
 
-def test_content_transmissibilities(gridproperty, globalconfig2):
+def test_content_transmissibilities(dataframe, globalconfig2):
     """Test export of the transmissibilities content."""
+    meta = ExportData(
+        config=globalconfig2,
+        name="MyName",
+        content="transmissibilities",
+    ).generate_metadata(dataframe)
 
-    # not supported (?)
+    assert meta["data"]["content"] == "transmissibilities"
 
 
 def test_content_velocity(regsurf, globalconfig2):