diff --git a/app/assets/javascripts/notes/components/mr_discussion_filter.vue b/app/assets/javascripts/notes/components/mr_discussion_filter.vue
index 4d78a888be70569210ab92193daaa71944a328c1..a98e5975c27043f5f8d6b561889484481d53e2b2 100644
--- a/app/assets/javascripts/notes/components/mr_discussion_filter.vue
+++ b/app/assets/javascripts/notes/components/mr_discussion_filter.vue
@@ -2,9 +2,10 @@
 import { GlCollapsibleListbox, GlButton, GlIcon, GlSprintf, GlButtonGroup } from '@gitlab/ui';
 // eslint-disable-next-line no-restricted-imports
 import { mapActions, mapState } from 'vuex';
+import { InternalEvents } from '~/tracking';
 import LocalStorageSync from '~/vue_shared/components/local_storage_sync.vue';
 import { __ } from '~/locale';
-import { MR_FILTER_OPTIONS } from '~/notes/constants';
+import { MR_FILTER_OPTIONS, MR_FILTER_TRACKING_OPENED } from '~/notes/constants';
 
 export default {
   components: {
@@ -15,6 +16,7 @@ export default {
     GlSprintf,
     LocalStorageSync,
   },
+  mixins: [InternalEvents.mixin()],
   data() {
     return {
       selectedFilters: MR_FILTER_OPTIONS.map((f) => f.value),
@@ -57,6 +59,9 @@ export default {
         direction: this.isSortAsc ? 'desc' : 'asc',
       });
     },
+    filterListShown() {
+      this.trackEvent(MR_FILTER_TRACKING_OPENED);
+    },
     applyFilters() {
       this.updateMergeRequestFilters(this.selectedFilters);
     },
@@ -97,6 +102,7 @@ export default {
         :reset-button-label="__('Deselect all')"
         multiple
         placement="right"
+        @shown="filterListShown"
         @hidden="applyFilters"
         @reset="deselectAll"
         @select-all="selectAll"
diff --git a/app/assets/javascripts/notes/constants.js b/app/assets/javascripts/notes/constants.js
index 153834ea9e4c590bbae9550b2a4b8e342aa6cbb3..32923d56c7964cbbfa1acc680e67f94e25c892bc 100644
--- a/app/assets/javascripts/notes/constants.js
+++ b/app/assets/javascripts/notes/constants.js
@@ -127,3 +127,4 @@ export const MR_FILTER_OPTIONS = [
     systemNoteIcons: ['timer'],
   },
 ];
+export const MR_FILTER_TRACKING_OPENED = 'user_clicks_comment_filter_dropdown';
diff --git a/config/events/user_clicks_comment_filter_dropdown.yml b/config/events/user_clicks_comment_filter_dropdown.yml
new file mode 100644
index 0000000000000000000000000000000000000000..5df8dc097e746c26faa1f4d5b9439c9525a73955
--- /dev/null
+++ b/config/events/user_clicks_comment_filter_dropdown.yml
@@ -0,0 +1,20 @@
+---
+description: A user clicks the merge request comment filter dropdown
+category: InternalEventTracking
+action: user_clicks_comment_filter_dropdown
+identifiers:
+- project
+- namespace
+- user
+product_section: dev
+product_stage: create
+product_group: code_review
+milestone: '16.10'
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145998
+distributions:
+- ce
+- ee
+tiers:
+- free
+- premium
+- ultimate
diff --git a/config/metrics/counts_28d/count_distinct_user_id_from_user_clicks_comment_filter_dropdown_monthly.yml b/config/metrics/counts_28d/count_distinct_user_id_from_user_clicks_comment_filter_dropdown_monthly.yml
new file mode 100644
index 0000000000000000000000000000000000000000..7353cc2838a03a8bd487c3d501c82dfe50359123
--- /dev/null
+++ b/config/metrics/counts_28d/count_distinct_user_id_from_user_clicks_comment_filter_dropdown_monthly.yml
@@ -0,0 +1,24 @@
+---
+key_path: redis_hll_counters.count_distinct_user_id_from_user_clicks_comment_filter_dropdown_monthly
+description: Monthly count of unique users who opened the MR comment filter dropdown
+product_section: dev
+product_stage: create
+product_group: code_review
+performance_indicator_type: []
+value_type: number
+status: active
+milestone: '16.10'
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145998
+time_frame: 28d
+data_source: internal_events
+data_category: optional
+distribution:
+- ce
+- ee
+tier:
+- free
+- premium
+- ultimate
+events:
+- name: user_clicks_comment_filter_dropdown
+  unique: user.id
diff --git a/config/metrics/counts_28d/count_total_user_clicks_comment_filter_dropdown_monthly.yml b/config/metrics/counts_28d/count_total_user_clicks_comment_filter_dropdown_monthly.yml
new file mode 100644
index 0000000000000000000000000000000000000000..89ebc58582ce293614d2884ce9b7c4b2bd255163
--- /dev/null
+++ b/config/metrics/counts_28d/count_total_user_clicks_comment_filter_dropdown_monthly.yml
@@ -0,0 +1,23 @@
+---
+key_path: counts.count_total_user_clicks_comment_filter_dropdown_monthly
+description: Monthly count of times the MR comment filter dropdown is opened
+product_section: dev
+product_stage: create
+product_group: code_review
+performance_indicator_type: []
+value_type: number
+status: active
+milestone: '16.10'
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145998
+time_frame: 28d
+data_source: internal_events
+data_category: optional
+distribution:
+- ce
+- ee
+tier:
+- free
+- premium
+- ultimate
+events:
+- name: user_clicks_comment_filter_dropdown
diff --git a/config/metrics/counts_7d/count_distinct_user_id_from_user_clicks_comment_filter_dropdown_weekly.yml b/config/metrics/counts_7d/count_distinct_user_id_from_user_clicks_comment_filter_dropdown_weekly.yml
new file mode 100644
index 0000000000000000000000000000000000000000..05fa3679c93bbe526ada26241e69f6406a0246eb
--- /dev/null
+++ b/config/metrics/counts_7d/count_distinct_user_id_from_user_clicks_comment_filter_dropdown_weekly.yml
@@ -0,0 +1,24 @@
+---
+key_path: redis_hll_counters.count_distinct_user_id_from_user_clicks_comment_filter_dropdown_weekly
+description: Weekly count of unique users who opened the MR comment filter dropdown
+product_section: dev
+product_stage: create
+product_group: code_review
+performance_indicator_type: []
+value_type: number
+status: active
+milestone: '16.10'
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145998
+time_frame: 7d
+data_source: internal_events
+data_category: optional
+distribution:
+- ce
+- ee
+tier:
+- free
+- premium
+- ultimate
+events:
+- name: user_clicks_comment_filter_dropdown
+  unique: user.id
diff --git a/config/metrics/counts_7d/count_total_user_clicks_comment_filter_dropdown_weekly.yml b/config/metrics/counts_7d/count_total_user_clicks_comment_filter_dropdown_weekly.yml
new file mode 100644
index 0000000000000000000000000000000000000000..7d40822ea0e8a33b2e035aa19aba508b836ae41f
--- /dev/null
+++ b/config/metrics/counts_7d/count_total_user_clicks_comment_filter_dropdown_weekly.yml
@@ -0,0 +1,23 @@
+---
+key_path: counts.count_total_user_clicks_comment_filter_dropdown_weekly
+description: Weekly count of times the MR comment filter dropdown is opened
+product_section: dev
+product_stage: create
+product_group: code_review
+performance_indicator_type: []
+value_type: number
+status: active
+milestone: '16.10'
+introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/145998
+time_frame: 7d
+data_source: internal_events
+data_category: optional
+distribution:
+- ce
+- ee
+tier:
+- free
+- premium
+- ultimate
+events:
+- name: user_clicks_comment_filter_dropdown
diff --git a/spec/frontend/notes/components/mr_discussion_filter_spec.js b/spec/frontend/notes/components/mr_discussion_filter_spec.js
index 73fd6da811dfaf5faa92b331779c4ce7eba5de49..a01c886381a921a1c1f480c7dce33c09eccdc06d 100644
--- a/spec/frontend/notes/components/mr_discussion_filter_spec.js
+++ b/spec/frontend/notes/components/mr_discussion_filter_spec.js
@@ -3,8 +3,9 @@ import { GlCollapsibleListbox, GlListboxItem, GlButton } from '@gitlab/ui';
 import Vue, { nextTick } from 'vue';
 // eslint-disable-next-line no-restricted-imports
 import Vuex from 'vuex';
+import { mockTracking } from 'helpers/tracking_helper';
 import DiscussionFilter from '~/notes/components/mr_discussion_filter.vue';
-import { MR_FILTER_OPTIONS } from '~/notes/constants';
+import { MR_FILTER_OPTIONS, MR_FILTER_TRACKING_OPENED } from '~/notes/constants';
 
 Vue.use(Vuex);
 
@@ -135,4 +136,23 @@ describe('Merge request discussion filter component', () => {
 
     expect(wrapper.findAll('[aria-selected="true"]')).toHaveLength(11);
   });
+
+  describe('instrumentation', () => {
+    let trackingSpy;
+
+    beforeEach(() => {
+      trackingSpy = mockTracking(undefined, window.document, jest.spyOn);
+      createComponent();
+    });
+
+    it('tracks overall opens of the filter dropdown', () => {
+      wrapper.findComponent(GlCollapsibleListbox).vm.$emit('shown');
+
+      expect(trackingSpy).toHaveBeenCalledWith(
+        undefined,
+        MR_FILTER_TRACKING_OPENED,
+        expect.any(Object),
+      );
+    });
+  });
 });