diff --git a/bin/commands/maintainers.rb b/bin/commands/maintainers.rb
index a1967eb..6439f53 100644
--- a/bin/commands/maintainers.rb
+++ b/bin/commands/maintainers.rb
@@ -25,6 +25,11 @@ class Commands
             puts "#{repo.html_url}: #{repo.maintainers.all_external} (#{repo.maintainers.all_external_unique_percent}%, #{repo.maintainers.all_external_unique_count}/#{repo.maintainers.unique_count})"
           end
 
+          puts "\n# External Maintainers (Repos)\n"
+          repos.external_maintainers.each_pair do |maintainer, repos_maintained|
+            puts "#{maintainer}: #{repos_maintained.map(&:html_url).join(', ')}"
+          end
+
           # GitHub::Maintainers::ALL_EXTERNAL.each do |bucket|
           #   repos.maintained[bucket]&.sort_by(&:name)&.each do |repo|
           #     puts "#{repo.html_url}: #{repo.maintainers.all_external} (#{repo.maintainers.all_external_unique_percent}%, #{repo.maintainers.all_external_unique_count}/#{repo.maintainers.unique_count})"
diff --git a/lib/github/maintainers.rb b/lib/github/maintainers.rb
index cda6a43..a5a78e6 100644
--- a/lib/github/maintainers.rb
+++ b/lib/github/maintainers.rb
@@ -21,7 +21,7 @@ def buckets
     def all_external
       ALL_EXTERNAL.map do |bucket|
         buckets[bucket]
-      end.flatten.compact
+      end.flatten.uniq.compact
     end
 
     def all_external_unique_percent
@@ -31,13 +31,13 @@ def all_external_unique_percent
     end
 
     def unique_count
-      buckets.values.map(&:size).sum
+      buckets.values.flatten.uniq.size
     end
 
     def all_external_unique_count
       ALL_EXTERNAL.map do |bucket|
-        buckets[bucket]&.size || 0
-      end.sum
+        buckets[bucket]
+      end.compact.flatten.uniq.size
     end
 
     def each_pair(&_block)
diff --git a/lib/github/repos.rb b/lib/github/repos.rb
index 9eb845d..1521a83 100644
--- a/lib/github/repos.rb
+++ b/lib/github/repos.rb
@@ -57,6 +57,19 @@ def externally_maintained
       end
     end
 
+    def external_maintainers
+      @external_maintainers ||= begin
+        all = {}
+        externally_maintained.each do |repo|
+          repo.maintainers.all_external.each do |maintainer|
+            all[maintainer] ||= []
+            all[maintainer] << repo
+          end
+        end
+        all
+      end
+    end
+
     def all_external_maintained_size
       Maintainers::ALL_EXTERNAL.map do |bucket|
         maintained[bucket]&.size || 0