diff --git a/lib/graphql/schema/actors/group.ex b/lib/graphql/schema/actors/group.ex
index eed6b889b..39265eadd 100644
--- a/lib/graphql/schema/actors/group.ex
+++ b/lib/graphql/schema/actors/group.ex
@@ -61,6 +61,11 @@ defmodule Mobilizon.GraphQL.Schema.Actors.GroupType do
       description: "The type of the event's address"
     )
 
+    field(:allow_see_participants, :boolean,
+      description: "Option to allow group's member to see event's participants",
+      default_value: false
+    )
+
     # These one should have a privacy setting
     field(:followers_count, :integer,
       description: "Number of followers for this actor",
@@ -320,6 +325,12 @@ defmodule Mobilizon.GraphQL.Schema.Actors.GroupType do
       )
 
       arg(:physical_address, :address_input, description: "The physical address for the group")
+
+      arg(:allow_see_participants, :boolean,
+        description: "Option to allow group's member to see event's participants",
+        default_value: false
+      )
+
       middleware(Rajska.QueryAuthorization, permit: :user, scope: false)
       resolve(&Group.create_group/3)
     end
@@ -352,6 +363,11 @@ defmodule Mobilizon.GraphQL.Schema.Actors.GroupType do
       )
 
       arg(:physical_address, :address_input, description: "The physical address for the group")
+
+      arg(:allow_see_participants, :boolean,
+        description: "Option to allow group's member to see event's participants"
+      )
+
       middleware(Rajska.QueryAuthorization, permit: :user, scope: false)
       resolve(&Group.update_group/3)
     end
diff --git a/lib/mobilizon/actors/actor.ex b/lib/mobilizon/actors/actor.ex
index d62f41288..4a0a1cf46 100644
--- a/lib/mobilizon/actors/actor.ex
+++ b/lib/mobilizon/actors/actor.ex
@@ -63,7 +63,8 @@ defmodule Mobilizon.Actors.Actor do
           owner_shares: [Share.t()],
           memberships: [t],
           last_refreshed_at: DateTime.t(),
-          physical_address: Address.t()
+          physical_address: Address.t(),
+          allow_see_participants: boolean
         }
 
   @required_attrs [:preferred_username, :keys, :suspended, :url]
@@ -85,6 +86,7 @@ defmodule Mobilizon.Actors.Actor do
     :last_refreshed_at,
     :user_id,
     :physical_address_id,
+    :allow_see_participants,
     :visibility
   ]
   @attrs @required_attrs ++ @optional_attrs
@@ -97,12 +99,13 @@ defmodule Mobilizon.Actors.Actor do
     :user_id,
     :visibility,
     :openness,
-    :physical_address_id
+    :physical_address_id,
+    :allow_see_participants
   ]
   @update_attrs @update_required_attrs ++ @update_optional_attrs
 
   @registration_required_attrs [:preferred_username, :keys, :suspended, :url, :type]
-  @registration_optional_attrs [:domain, :name, :summary, :user_id]
+  @registration_optional_attrs [:domain, :name, :summary, :user_id, :allow_see_participants]
   @registration_attrs @registration_required_attrs ++ @registration_optional_attrs
 
   @remote_actor_creation_required_attrs [
@@ -129,7 +132,8 @@ defmodule Mobilizon.Actors.Actor do
     :manually_approves_followers,
     :visibility,
     :openness,
-    :physical_address_id
+    :physical_address_id,
+    :allow_see_participants
   ]
   @remote_actor_creation_attrs @remote_actor_creation_required_attrs ++
                                  @remote_actor_creation_optional_attrs
@@ -149,7 +153,8 @@ defmodule Mobilizon.Actors.Actor do
     :summary,
     :visibility,
     :openness,
-    :manually_approves_followers
+    :manually_approves_followers,
+    :allow_see_participants
   ]
   @group_creation_attrs @group_creation_required_attrs ++ @group_creation_optional_attrs
 
@@ -179,6 +184,7 @@ defmodule Mobilizon.Actors.Actor do
     field(:visibility, ActorVisibility, default: :private)
     field(:suspended, :boolean, default: false)
     field(:last_refreshed_at, :utc_datetime)
+    field(:allow_see_participants, :boolean, default: false)
 
     embeds_one(:avatar, File, on_replace: :update)
     embeds_one(:banner, File, on_replace: :update)
diff --git a/priv/repo/migrations/20201105145719_repair_groups_with_missing_ur_ls.exs b/priv/repo/migrations/20201105145719_repair_groups_with_missing_ur_ls.exs
index bfb6e9f1c..1570cbdb8 100644
--- a/priv/repo/migrations/20201105145719_repair_groups_with_missing_ur_ls.exs
+++ b/priv/repo/migrations/20201105145719_repair_groups_with_missing_ur_ls.exs
@@ -7,6 +7,12 @@ defmodule Mobilizon.Storage.Repo.Migrations.RepairGroupsWithMissingURLs do
   def up do
     Actor
     |> where([a], a.type == :Group and is_nil(a.domain))
+    |> select(
+      [a],
+      {a.id, a.url, a.outbox_url, a.inbox_url, a.following_url, a.followers_url,
+       a.shared_inbox_url, a.members_url, a.resources_url, a.posts_url, a.events_url, a.todos_url,
+       a.discussions_url, a.type, a.name, a.domain}
+    )
     |> Repo.all()
     |> Enum.each(&fix_group/1)
   end
diff --git a/priv/repo/migrations/20251111093015_add_allow_to_group.exs b/priv/repo/migrations/20251111093015_add_allow_to_group.exs
new file mode 100644
index 000000000..a8006c6b0
--- /dev/null
+++ b/priv/repo/migrations/20251111093015_add_allow_to_group.exs
@@ -0,0 +1,9 @@
+defmodule Mobilizon.Storage.Repo.Migrations.AddAllowToGroup do
+  use Ecto.Migration
+
+  def change do
+    alter table("actors") do
+      add(:allow_see_participants, :boolean, default: false, null: false)
+    end
+  end
+end
diff --git a/schema.graphql b/schema.graphql
index 99a0b0324..27a3f7b50 100644
--- a/schema.graphql
+++ b/schema.graphql
@@ -1478,6 +1478,9 @@ type RootMutationType {
 
     "The physical address for the group"
     physicalAddress: AddressInput
+
+    "Option to allow group's member to see event's participants"
+    allowSeeParticipants: Boolean
   ): Group
 
   "Update a group"
diff --git a/test/graphql/resolvers/group_test.exs b/test/graphql/resolvers/group_test.exs
index d10d7471d..9f174ca1d 100644
--- a/test/graphql/resolvers/group_test.exs
+++ b/test/graphql/resolvers/group_test.exs
@@ -25,6 +25,7 @@ defmodule Mobilizon.Web.Resolvers.GroupTest do
     $summary: String
     $avatar: MediaInput
     $banner: MediaInput
+    $allowSeeParticipants: Boolean
     ) {
       createGroup(
         preferredUsername: $preferredUsername
@@ -32,6 +33,7 @@ defmodule Mobilizon.Web.Resolvers.GroupTest do
         summary: $summary
         banner: $banner
         avatar: $avatar
+        allowSeeParticipants: $allowSeeParticipants
       ) {
         preferredUsername
         type
@@ -39,6 +41,7 @@ defmodule Mobilizon.Web.Resolvers.GroupTest do
           uuid
           url
         }
+        allowSeeParticipants
       }
     }
     """
@@ -59,6 +62,7 @@ defmodule Mobilizon.Web.Resolvers.GroupTest do
                @new_group_params.preferredUsername
 
       assert res["data"]["createGroup"]["type"] == "GROUP"
+      assert res["data"]["createGroup"]["allowSeeParticipants"] == false
 
       res =
         conn
@@ -72,6 +76,44 @@ defmodule Mobilizon.Web.Resolvers.GroupTest do
                "A profile or group with that name already exists"
     end
 
+    test "creates a group with allowSeeParticipants to false",
+         %{conn: conn, user: user} do
+      res =
+        conn
+        |> auth_conn(user)
+        |> AbsintheHelpers.graphql_query(
+          query: @create_group_mutation,
+          variables: Map.put(@new_group_params, :allowSeeParticipants, false)
+        )
+
+      assert res["errors"] == nil
+
+      assert res["data"]["createGroup"]["preferredUsername"] ==
+               @new_group_params.preferredUsername
+
+      assert res["data"]["createGroup"]["type"] == "GROUP"
+      assert res["data"]["createGroup"]["allowSeeParticipants"] == false
+    end
+
+    test "creates a group with allowSeeParticipants to true",
+         %{conn: conn, user: user} do
+      res =
+        conn
+        |> auth_conn(user)
+        |> AbsintheHelpers.graphql_query(
+          query: @create_group_mutation,
+          variables: Map.put(@new_group_params, :allowSeeParticipants, true)
+        )
+
+      assert res["errors"] == nil
+
+      assert res["data"]["createGroup"]["preferredUsername"] ==
+               @new_group_params.preferredUsername
+
+      assert res["data"]["createGroup"]["type"] == "GROUP"
+      assert res["data"]["createGroup"]["allowSeeParticipants"] == true
+    end
+
     test "doesn't creates a group if the username doesn't match the requirements",
          %{conn: conn, user: user} do
       res =