diff --git a/models/chunter/src/index.ts b/models/chunter/src/index.ts
index 2cb8cc412e..ee376ce0b9 100644
--- a/models/chunter/src/index.ts
+++ b/models/chunter/src/index.ts
@@ -55,6 +55,7 @@ import view, { createAction, actionTemplates as viewTemplates } from '@hcenginee
 import workbench from '@hcengineering/model-workbench'
 import chunter from './plugin'
 import { type AnyComponent } from '@hcengineering/ui/src/types'
+import { TypeBoolean } from '@hcengineering/model'
 export { chunterId } from '@hcengineering/chunter'
 export { chunterOperation } from './migration'
 
@@ -153,6 +154,9 @@ export class TComment extends TAttachedDoc implements Comment {
 
   @Prop(Collection(chunter.class.Reaction), chunter.string.Reactions)
     reactions?: number
+
+  @Prop(TypeBoolean(), chunter.string.PinMessage)
+    pinned?: boolean
 }
 
 @Model(chunter.class.Backlink, chunter.class.Comment)
@@ -753,6 +757,18 @@ export function createModel (builder: Builder, options = { addApplication: true
     chunter.ids.ActivityExtension
   )
 
+  builder.createDoc(
+    activity.class.ActivityExtension,
+    core.space.Model,
+    {
+      ofClass: chunter.class.Comment,
+      components: {
+        action: chunter.component.PinComment
+      }
+    },
+    chunter.ids.PinExtension
+  )
+
   builder.createDoc(
     activity.class.ActivityExtension,
     core.space.Model,
diff --git a/models/chunter/src/plugin.ts b/models/chunter/src/plugin.ts
index 65748b3860..c485cf36fc 100644
--- a/models/chunter/src/plugin.ts
+++ b/models/chunter/src/plugin.ts
@@ -34,7 +34,8 @@ export default mergeIds(chunterId, chunter, {
     SavedMessages: '' as AnyComponent,
     ChunterBrowser: '' as AnyComponent,
     CommentReactions: '' as AnyComponent,
-    ReactionsAction: '' as AnyComponent
+    ReactionsAction: '' as AnyComponent,
+    PinComment: '' as AnyComponent
   },
   action: {
     MarkCommentUnread: '' as Ref<Action>,
@@ -93,7 +94,8 @@ export default mergeIds(chunterId, chunter, {
     TxMessageCreate: '' as Ref<TxViewlet>,
     ChunterNotificationGroup: '' as Ref<NotificationGroup>,
     ActivityExtension: '' as Ref<ActivityExtension>,
-    BackLinkActivityExtension: '' as Ref<ActivityExtension>
+    BackLinkActivityExtension: '' as Ref<ActivityExtension>,
+    PinExtension: '' as Ref<ActivityExtension>
   },
   activity: {
     TxCommentCreate: '' as AnyComponent,
diff --git a/plugins/activity-resources/src/components/ActivityFilter.svelte b/plugins/activity-resources/src/components/ActivityFilter.svelte
index 43a982b9e3..b226d4f42f 100644
--- a/plugins/activity-resources/src/components/ActivityFilter.svelte
+++ b/plugins/activity-resources/src/components/ActivityFilter.svelte
@@ -85,8 +85,9 @@
     filters: ActivityFilter[],
     selected: Ref<Doc>[] | 'All'
   ): Promise<void> {
+    const txesSorted = txes.sort((tx) => ((tx.doc as any)?.pinned ? -1 : 1))
     if (selected === 'All') {
-      filtered = txes
+      filtered = txesSorted
       dispatch('update', filtered)
     } else {
       selectedFilters = filters.filter((filter) => selected.includes(filter._id))
@@ -95,7 +96,7 @@
         const fltr = await getResource(filter.filter)
         filterActions.push(fltr)
       }
-      filtered = txes.filter((it) => filterActions.some((f) => f(it, object._class)))
+      filtered = txesSorted.filter((it) => filterActions.some((f) => f(it, object._class)))
       dispatch('update', filtered)
     }
   }
diff --git a/plugins/chunter-resources/src/components/PinComment.svelte b/plugins/chunter-resources/src/components/PinComment.svelte
new file mode 100644
index 0000000000..bbb35e1244
--- /dev/null
+++ b/plugins/chunter-resources/src/components/PinComment.svelte
@@ -0,0 +1,37 @@
+<!--
+// Copyright © 2023 Hardcore Engineering Inc.
+//
+// Licensed under the Eclipse Public License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License. You may
+// obtain a copy of the License at https://www.eclipse.org/legal/epl-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//
+// See the License for the specific language governing permissions and
+// limitations under the License.
+-->
+<script lang="ts">
+  import { ActionIcon } from '@hcengineering/ui'
+  import { getClient } from '@hcengineering/presentation'
+  import { type Comment } from '@hcengineering/chunter'
+  import view from '@hcengineering/view'
+
+  export let object: Comment | undefined = undefined
+
+  const client = getClient()
+
+  async function pinComment (ev: Event): Promise<void> {
+    if (object !== undefined) {
+      await client.update(object, { pinned: !object?.pinned })
+    }
+  }
+</script>
+
+<ActionIcon
+  icon={view.icon.Pin}
+  iconProps={object?.pinned === true ? { fill: '#3265cb' } : undefined}
+  size="medium"
+  action={pinComment}
+/>
diff --git a/plugins/chunter-resources/src/index.ts b/plugins/chunter-resources/src/index.ts
index 6d68ab4b89..4ffdc4b2de 100644
--- a/plugins/chunter-resources/src/index.ts
+++ b/plugins/chunter-resources/src/index.ts
@@ -71,6 +71,7 @@ import TxCommentCreate from './components/activity/TxCommentCreate.svelte'
 import TxMessageCreate from './components/activity/TxMessageCreate.svelte'
 import ReactionsAction from './components/ReactionsAction.svelte'
 import CommentReactions from './components/CommentReactions.svelte'
+import PinComment from './components/PinComment.svelte'
 
 import notification from '@hcengineering/notification'
 import { writable } from 'svelte/store'
@@ -310,7 +311,8 @@ export default async (): Promise<Resources> => ({
     SavedMessages,
     CommentPanel,
     ReactionsAction,
-    CommentReactions
+    CommentReactions,
+    PinComment
   },
   function: {
     GetDmName: getDmName,
diff --git a/plugins/chunter/src/index.ts b/plugins/chunter/src/index.ts
index e891de3a1c..6ef2ae5828 100644
--- a/plugins/chunter/src/index.ts
+++ b/plugins/chunter/src/index.ts
@@ -103,6 +103,7 @@ export interface Comment extends AttachedDoc {
   message: string
   attachments?: number
   reactions?: number
+  pinned?: boolean
 }
 
 /**