diff --git a/CHANGELOG.md b/CHANGELOG.md
index a807e74eaa7..72def3d45c6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 **Internal**:
 
+- Add ui chunk profiling data category. ([#4593](https://github.com/getsentry/relay/pull/4593))
 - Switch global rate limiter to a service. ([#4581](https://github.com/getsentry/relay/pull/4581))
 
 ## 25.3.0
diff --git a/py/CHANGELOG.md b/py/CHANGELOG.md
index 26392906b61..38482e8ce8d 100644
--- a/py/CHANGELOG.md
+++ b/py/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 - Remove unused capability to block metric names and tags. ([#4536](https://github.com/getsentry/relay/pull/4536))
 - Deprecate ReplayVideo data category ([#4560](https://github.com/getsentry/relay/pull/4560))
+- Add ui chunk profiling data category. ([#4593](https://github.com/getsentry/relay/pull/4593))
 
 ## 0.9.6
 
diff --git a/py/sentry_relay/consts.py b/py/sentry_relay/consts.py
index 808eb28e19d..c2c9c74df7f 100644
--- a/py/sentry_relay/consts.py
+++ b/py/sentry_relay/consts.py
@@ -35,6 +35,7 @@ class DataCategory(IntEnum):
     LOG_ITEM = 23
     LOG_BYTE = 24
     PROFILE_DURATION_UI = 25
+    PROFILE_CHUNK_UI = 26
     UNKNOWN = -1
     # end generated
 
diff --git a/relay-base-schema/src/data_category.rs b/relay-base-schema/src/data_category.rs
index 82e908c9e78..1d29704d1ba 100644
--- a/relay-base-schema/src/data_category.rs
+++ b/relay-base-schema/src/data_category.rs
@@ -101,11 +101,20 @@ pub enum DataCategory {
     ///
     /// This is the category for logs for which we store log event total bytes for users.
     LogByte = 24,
-    /// ProfileDurationUi
+    /// Profile duration of a UI profile.
     ///
     /// This data category is used to count the number of milliseconds per indexed UI profile
     /// chunk.
+    ///
+    /// See also: [`Self::ProfileDuration`]
     ProfileDurationUi = 25,
+    /// UI Profile Chunk.
+    ///
+    /// This data category is used to count the number of milliseconds per indexed UI profile
+    /// chunk.
+    ///
+    /// See also: [`Self::ProfileChunk`]
+    ProfileChunkUi = 26,
 
     //
     // IMPORTANT: After adding a new entry to DataCategory, go to the `relay-cabi` subfolder and run
@@ -145,6 +154,7 @@ impl DataCategory {
             "profile_duration" => Self::ProfileDuration,
             "profile_duration_ui" => Self::ProfileDurationUi,
             "profile_chunk" => Self::ProfileChunk,
+            "profile_chunk_ui" => Self::ProfileChunkUi,
             "metric_second" => Self::MetricSecond,
             "replay_video" => Self::DoNotUseReplayVideo,
             "uptime" => Self::Uptime,
@@ -180,6 +190,7 @@ impl DataCategory {
             Self::ProfileDuration => "profile_duration",
             Self::ProfileDurationUi => "profile_duration_ui",
             Self::ProfileChunk => "profile_chunk",
+            Self::ProfileChunkUi => "profile_chunk_ui",
             Self::MetricSecond => "metric_second",
             Self::Uptime => "uptime",
             Self::AttachmentItem => "attachment_item",
diff --git a/relay-cabi/include/relay.h b/relay-cabi/include/relay.h
index f31cac907eb..7cdc2511bc0 100644
--- a/relay-cabi/include/relay.h
+++ b/relay-cabi/include/relay.h
@@ -156,12 +156,23 @@ enum RelayDataCategory {
    */
   RELAY_DATA_CATEGORY_LOG_BYTE = 24,
   /**
-   * ProfileDurationUi
+   * Profile duration of a UI profile.
    *
    * This data category is used to count the number of milliseconds per indexed UI profile
    * chunk.
+   *
+   * See also: [`Self::ProfileDuration`]
    */
   RELAY_DATA_CATEGORY_PROFILE_DURATION_UI = 25,
+  /**
+   * UI Profile Chunk.
+   *
+   * This data category is used to count the number of milliseconds per indexed UI profile
+   * chunk.
+   *
+   * See also: [`Self::ProfileChunk`]
+   */
+  RELAY_DATA_CATEGORY_PROFILE_CHUNK_UI = 26,
   /**
    * Any other data category not known by this Relay.
    */
diff --git a/relay-quotas/src/quota.rs b/relay-quotas/src/quota.rs
index 9af263fa2ef..9ab24ba31d1 100644
--- a/relay-quotas/src/quota.rs
+++ b/relay-quotas/src/quota.rs
@@ -207,6 +207,7 @@ impl CategoryUnit {
             | DataCategory::MetricBucket
             | DataCategory::UserReportV2
             | DataCategory::ProfileChunk
+            | DataCategory::ProfileChunkUi
             | DataCategory::Uptime
             | DataCategory::MetricSecond
             | DataCategory::AttachmentItem