diff --git a/hooks/__init__.py b/hooks/__init__.py
index bb9b3be..0ab2c5a 100644
--- a/hooks/__init__.py
+++ b/hooks/__init__.py
@@ -3,6 +3,7 @@ from .bad_command import BadCommand
 from .cancel_previous_input import CancelPreviousInput
 from .collective_subject import CollectiveSubject
 from .comment import Comment
+from .completion import Completion
 from .chrono import Chrono
 from .current import Current
 from .date import Date
@@ -36,6 +37,7 @@ hooks = (
     Help(),
     IndividualSubject(),
     Missing(),
+    Completion(),
     Record(),
     StartReview(),
     StopReview(),
diff --git a/hooks/completion.py b/hooks/completion.py
new file mode 100644
index 0000000..93b1046
--- /dev/null
+++ b/hooks/completion.py
@@ -0,0 +1,44 @@
+import logger
+
+
+class Completion:
+    def process(self, bot, channel, sender, message):
+        """
+        Si la commande est bonne, le bot renvoie la liste des personnes ayant participé
+        au sujet en cours mais n'ayant pas encore fini (commentaire %fini ou % fini).
+        """
+        if message.lower() in ("!complet", ):
+            logger.info("!complet caught.")
+
+            if not bot.review.is_started:
+                bot.send(channel, f"{sender}, pas de revue en cours.")
+                return True
+
+            if bot.review.current_topic is None:
+                bot.send(channel, "% Pas de sujet en cours.")
+                return True
+
+            participants = bot.review.current_topic.participants
+            find_text = f"# {bot.review.current_topic.title}"
+            if bot.review.current_topic.collective:
+                find_text = "#" + find_text
+            text_found = False
+            for message in bot.review.messages:
+                if text_found:
+                    if message.text in ("%fini", "% fini", "%ras", "% ras"):
+                        participants = list(set(participants) - set((message.author,)))
+                if find_text == message.text:
+                    text_found = True
+            if participants == []:
+                bot.send(
+                    channel,
+                    "% Tout le monde a terminé de s'exprimer sur le sujet courant \\o/",
+                )
+            else:
+                bot.send(
+                    channel,
+                    "% Personnes n'ayant pas encore terminé de s'exprimer sur le "
+                    f"sujet courant : {', '.join(participants)}",
+                )
+
+            return True
\ No newline at end of file
diff --git a/tests/test_review_hooks.py b/tests/test_review_hooks.py
index a1f5e80..2e858cc 100644
--- a/tests/test_review_hooks.py
+++ b/tests/test_review_hooks.py
@@ -1,7 +1,7 @@
 from datetime import datetime, timedelta
 import shutil
 
-from tests.utils import bot, OWNER, SENDER
+from tests.utils import bot, OWNER, SENDER, SENDER_2
 
 
 def setup_function():
@@ -515,3 +515,54 @@ def test_finish_review_no_participation(bot):
     bot.test_public_message(bot.channel, OWNER, "!fin")
     assert len(bot.answers) == 1
     assert bot.answers[0].message == "Participation nulle détectée. La revue est ignorée."
+
+
+def test_simple_completion_on_topic(bot):
+    bot.test_public_message(bot.channel, OWNER, "!start")
+    bot.test_public_message(bot.channel, OWNER, "# individual topic")
+    bot.test_public_message(bot.channel, OWNER, "Owner message on individual topic")
+    bot.test_public_message(bot.channel, SENDER, "Sender message on individual topic")
+    bot.test_public_message(bot.channel, SENDER_2, "Sender_2 message on individual topic")
+    bot.test_public_message(bot.channel, OWNER, "## collective topic")
+    bot.test_public_message(bot.channel, OWNER, "Owner message on collective topic")
+    bot.test_public_message(bot.channel, SENDER, "Sender message on collective topic")
+    bot.test_public_message(bot.channel, OWNER, "!complet")
+    assert len(bot.answers) == 1
+    assert SENDER_2 not in bot.answers[0].message[76:]
+    assert SENDER in bot.answers[0].message[76:]
+    assert OWNER in bot.answers[0].message[76:]
+
+def test_semi_completion_on_topic(bot):
+    bot.test_public_message(bot.channel, OWNER, "!start")
+    bot.test_public_message(bot.channel, OWNER, "# individual topic")
+    bot.test_public_message(bot.channel, OWNER, "Owner message on individual topic")
+    bot.test_public_message(bot.channel, SENDER, "Sender message on individual topic")
+    bot.test_public_message(bot.channel, SENDER_2, "Sender_2 message on individual topic")
+    bot.test_public_message(bot.channel, OWNER, "## collective topic")
+    bot.test_public_message(bot.channel, OWNER, "Owner message on collective topic")
+    bot.test_public_message(bot.channel, SENDER, "Sender message on collective topic")
+    bot.test_public_message(bot.channel, SENDER_2, "%ras")
+    bot.test_public_message(bot.channel, SENDER, "%fini")
+    bot.test_public_message(bot.channel, OWNER, "!complet")
+    assert len(bot.answers) == 1
+    assert SENDER_2 not in bot.answers[0].message[76:]
+    assert SENDER not in bot.answers[0].message[76:]
+    assert OWNER in bot.answers[0].message[76:]
+
+def test_total_completion_on_topic(bot):
+    bot.test_public_message(bot.channel, OWNER, "!start")
+    bot.test_public_message(bot.channel, OWNER, "# individual topic")
+    bot.test_public_message(bot.channel, OWNER, "Owner message on individual topic")
+    bot.test_public_message(bot.channel, SENDER, "Sender message on individual topic")
+    bot.test_public_message(bot.channel, SENDER_2, "Sender_2 message on individual topic")
+    bot.test_public_message(bot.channel, OWNER, "## collective topic")
+    bot.test_public_message(bot.channel, OWNER, "Owner message on collective topic")
+    bot.test_public_message(bot.channel, SENDER, "Sender message on collective topic")
+    bot.test_public_message(bot.channel, SENDER_2, "%ras")
+    bot.test_public_message(bot.channel, SENDER, "%fini")
+    bot.test_public_message(bot.channel, OWNER, "% fini")
+    bot.test_public_message(bot.channel, OWNER, "!complet")
+    assert len(bot.answers) == 1
+    assert SENDER_2 + "," not in bot.answers[0].message[76:]
+    assert SENDER + "," not in bot.answers[0].message[76:]
+    assert OWNER + "," not in bot.answers[0].message[76:]
diff --git a/tests/utils.py b/tests/utils.py
index 6d6fb71..f68b1c0 100644
--- a/tests/utils.py
+++ b/tests/utils.py
@@ -7,6 +7,7 @@ from tests import settings
 
 OWNER = "me"
 SENDER = "foobar"
+SENDER_2 = "foobaz"
 
 
 @dataclass