diff --git a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_base.sql b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_base.sql
index a92ac96c..1213403a 100644
--- a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_base.sql
+++ b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_base.sql
@@ -18,6 +18,8 @@ WHERE
     event_unstruct.contexts IS NOT NULL
     AND context.value:schema::STRING
     != 'iglu:com.snowplowanalytics.snowplow/web_page/jsonschema/1-0-0'
+    -- limit to last 6 months for performance purposes
+    AND event_unstruct.event_created_at::DATE > DATEADD(MONTH, -6, CURRENT_DATE())
 
 {% if is_incremental() %}
 
diff --git a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_cli.sql b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_cli.sql
index c0cccb9c..90bac77a 100644
--- a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_cli.sql
+++ b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_cli.sql
@@ -15,6 +15,7 @@ WITH base_1_0_0 AS (
         MAX(SPLIT_PART(schema_name, '/', -1)) AS schema_version
     FROM {{ ref('context_base') }}
     WHERE schema_name = 'iglu:com.meltano/cli_context/jsonschema/1-0-0'
+        AND context_base.event_created_at::DATE > DATEADD(MONTH, -6, CURRENT_DATE())
     GROUP BY 1
 ),
 
@@ -51,6 +52,7 @@ base_1_1_0_onward AS (
     WHERE
         schema_name LIKE 'iglu:com.meltano/cli_context/%'
         AND schema_name != 'iglu:com.meltano/cli_context/jsonschema/1-0-0'
+        AND context_base.event_created_at::DATE > DATEADD(MONTH, -6, CURRENT_DATE())
     GROUP BY 1
 
 )
diff --git a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_environment.sql b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_environment.sql
index 378a200e..0e4a5622 100644
--- a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_environment.sql
+++ b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_environment.sql
@@ -39,6 +39,7 @@ WITH base AS (
     FROM {{ ref('context_base') }}
     WHERE
         schema_name LIKE 'iglu:com.meltano/environment_context/%'
+        AND context_base.event_created_at::DATE > DATEADD(MONTH, -6, CURRENT_DATE())
     GROUP BY 1
 
 )
diff --git a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_exception.sql b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_exception.sql
index 60b971d2..b5a74c23 100644
--- a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_exception.sql
+++ b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_exception.sql
@@ -15,6 +15,7 @@ WITH base AS (
     FROM {{ ref('context_base') }}
     WHERE
         schema_name LIKE 'iglu:com.meltano/exception_context/%'
+        AND context_base.event_created_at::DATE > DATEADD(MONTH, -6, CURRENT_DATE())
     GROUP BY 1
 
 )
diff --git a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_identify.sql b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_identify.sql
index 63418176..7a5e0f49 100644
--- a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_identify.sql
+++ b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_identify.sql
@@ -19,6 +19,7 @@ WITH base AS (
     FROM {{ ref('context_base') }}
     WHERE
         schema_name LIKE 'iglu:com.meltano/identify_context/%'
+        AND context_base.event_created_at::DATE > DATEADD(MONTH, -6, CURRENT_DATE())
     GROUP BY 1
 
 )
diff --git a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_plugins.sql b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_plugins.sql
index 98bd88c9..4d14987d 100644
--- a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_plugins.sql
+++ b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_plugins.sql
@@ -15,6 +15,7 @@ WITH base AS (
     FROM {{ ref('context_base') }}
     WHERE
         schema_name LIKE 'iglu:com.meltano/plugins_context/%'
+        AND context_base.event_created_at::DATE > DATEADD(MONTH, -6, CURRENT_DATE())
 
 ),
 
diff --git a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_project.sql b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_project.sql
index 86fde37b..7e338c3b 100644
--- a/data/transform/models/marts/telemetry/base/unstructured_parsing/context_project.sql
+++ b/data/transform/models/marts/telemetry/base/unstructured_parsing/context_project.sql
@@ -28,6 +28,7 @@ WITH base AS (
     FROM {{ ref('context_base') }}
     WHERE
         schema_name LIKE 'iglu:com.meltano/project_context/%'
+        AND context_base.event_created_at::DATE > DATEADD(MONTH, -6, CURRENT_DATE())
     GROUP BY 1
 
 )