diff --git a/runtime/doc/builtin.txt b/runtime/doc/builtin.txt
index 7389a86b9d69d7..3a181f27e52ed8 100644
--- a/runtime/doc/builtin.txt
+++ b/runtime/doc/builtin.txt
@@ -1866,6 +1866,8 @@ cmdcomplete_info()					*cmdcomplete_info()*
 				typed text only, or the last completion after
 				no item is selected when using the <Up> or
 				<Down> keys)
+		   preinserted_text
+				The actual text that is pre-inserted.
 
 		Returns an empty |Dictionary| if no completion was attempted,
 		if there was only one candidate and it was fully completed, or
diff --git a/src/insexpand.c b/src/insexpand.c
index 4edcfe53e04302..321700414b7ee7 100644
--- a/src/insexpand.c
+++ b/src/insexpand.c
@@ -4186,13 +4186,14 @@ get_complete_info(list_T *what_list, dict_T *retdict)
 {
     int		ret = OK;
     listitem_T	*item;
-#define CI_WHAT_MODE		0x01
-#define CI_WHAT_PUM_VISIBLE	0x02
-#define CI_WHAT_ITEMS		0x04
-#define CI_WHAT_SELECTED	0x08
-#define CI_WHAT_COMPLETED	0x10
-#define CI_WHAT_MATCHES		0x20
-#define CI_WHAT_ALL		0xff
+#define CI_WHAT_MODE		    0x01
+#define CI_WHAT_PUM_VISIBLE	    0x02
+#define CI_WHAT_ITEMS		    0x04
+#define CI_WHAT_SELECTED	    0x08
+#define CI_WHAT_COMPLETED	    0x10
+#define CI_WHAT_MATCHES		    0x20
+#define CI_WHAT_PREINSERTED_TEXT    0x40
+#define CI_WHAT_ALL		    0xff
     int		what_flag;
 
     if (what_list == NULL)
@@ -4215,6 +4216,8 @@ get_complete_info(list_T *what_list, dict_T *retdict)
 		what_flag |= CI_WHAT_SELECTED;
 	    else if (STRCMP(what, "completed") == 0)
 		what_flag |= CI_WHAT_COMPLETED;
+	    else if (STRCMP(what, "preinserted_text") == 0)
+		what_flag |= CI_WHAT_PREINSERTED_TEXT;
 	    else if (STRCMP(what, "matches") == 0)
 		what_flag |= CI_WHAT_MATCHES;
 	}
@@ -4226,6 +4229,15 @@ get_complete_info(list_T *what_list, dict_T *retdict)
     if (ret == OK && (what_flag & CI_WHAT_PUM_VISIBLE))
 	ret = dict_add_number(retdict, "pum_visible", pum_visible());
 
+    if (ret == OK && (what_flag & CI_WHAT_PREINSERTED_TEXT))
+    {
+	char_u	*line = ml_get_curline();
+	int	len = compl_ins_end_col - curwin->w_cursor.col;
+
+	ret = dict_add_string_len(retdict, "preinserted_text",
+		(len > 0) ? line + curwin->w_cursor.col : (char_u *)"", len);
+    }
+
     if (ret == OK && (what_flag & (CI_WHAT_ITEMS | CI_WHAT_SELECTED
 				    | CI_WHAT_MATCHES | CI_WHAT_COMPLETED)))
     {
diff --git a/src/testdir/test_ins_complete.vim b/src/testdir/test_ins_complete.vim
index 6d492373c4c320..02a193cad21e33 100644
--- a/src/testdir/test_ins_complete.vim
+++ b/src/testdir/test_ins_complete.vim
@@ -572,15 +572,15 @@ func Test_completefunc_info()
   set completeopt=menuone
   set completefunc=CompleteTest
   call feedkeys("i\<C-X>\<C-U>\<C-R>\<C-R>=string(complete_info())\<CR>\<ESC>", "tx")
-  call assert_equal("matched{'pum_visible': 1, 'mode': 'function', 'selected': 0, 'items': [{'word': 'matched', 'menu': '', 'user_data': '', 'info': '', 'kind': '', 'abbr': ''}]}", getline(1))
+  call assert_equal("matched{'preinserted_text': '', 'pum_visible': 1, 'mode': 'function', 'selected': 0, 'items': [{'word': 'matched', 'menu': '', 'user_data': '', 'info': '', 'kind': '', 'abbr': ''}]}", getline(1))
   %d
   set complete=.,FCompleteTest
   call feedkeys("i\<C-N>\<C-R>\<C-R>=string(complete_info())\<CR>\<ESC>", "tx")
-  call assert_equal("matched{'pum_visible': 1, 'mode': 'keyword', 'selected': 0, 'items': [{'word': 'matched', 'menu': '', 'user_data': '', 'info': '', 'kind': '', 'abbr': ''}]}", getline(1))
+  call assert_equal("matched{'preinserted_text': '', 'pum_visible': 1, 'mode': 'keyword', 'selected': 0, 'items': [{'word': 'matched', 'menu': '', 'user_data': '', 'info': '', 'kind': '', 'abbr': ''}]}", getline(1))
   %d
   set complete=.,F
   call feedkeys("i\<C-N>\<C-R>\<C-R>=string(complete_info())\<CR>\<ESC>", "tx")
-  call assert_equal("matched{'pum_visible': 1, 'mode': 'keyword', 'selected': 0, 'items': [{'word': 'matched', 'menu': '', 'user_data': '', 'info': '', 'kind': '', 'abbr': ''}]}", getline(1))
+  call assert_equal("matched{'preinserted_text': '', 'pum_visible': 1, 'mode': 'keyword', 'selected': 0, 'items': [{'word': 'matched', 'menu': '', 'user_data': '', 'info': '', 'kind': '', 'abbr': ''}]}", getline(1))
   set completeopt&
   set complete&
   set completefunc&
@@ -698,17 +698,17 @@ func CompleteInfoTestUserDefinedFn(mvmt, idx, noselect)
   set completefunc=CompleteInfoUserDefinedFn
   call feedkeys("i\<C-X>\<C-U>" . a:mvmt . "\<C-R>\<C-R>=string(complete_info())\<CR>\<ESC>", "tx")
   let completed = a:idx != -1 ? ['foo', 'bar', 'baz', 'qux']->get(a:idx) : ''
-  call assert_equal(completed. "{'pum_visible': 1, 'mode': 'function', 'selected': " . a:idx . ", 'items': " . items . "}", getline(1))
+  call assert_equal(completed. "{'preinserted_text': '', 'pum_visible': 1, 'mode': 'function', 'selected': " . a:idx . ", 'items': " . items . "}", getline(1))
   %d
   set complete=.,FCompleteInfoUserDefinedFn
   call feedkeys("i\<C-N>" . a:mvmt . "\<C-R>\<C-R>=string(complete_info())\<CR>\<ESC>", "tx")
   let completed = a:idx != -1 ? ['foo', 'bar', 'baz', 'qux']->get(a:idx) : ''
-  call assert_equal(completed. "{'pum_visible': 1, 'mode': 'keyword', 'selected': " . a:idx . ", 'items': " . items . "}", getline(1))
+  call assert_equal(completed. "{'preinserted_text': '', 'pum_visible': 1, 'mode': 'keyword', 'selected': " . a:idx . ", 'items': " . items . "}", getline(1))
   %d
   set complete=.,F
   call feedkeys("i\<C-N>" . a:mvmt . "\<C-R>\<C-R>=string(complete_info())\<CR>\<ESC>", "tx")
   let completed = a:idx != -1 ? ['foo', 'bar', 'baz', 'qux']->get(a:idx) : ''
-  call assert_equal(completed. "{'pum_visible': 1, 'mode': 'keyword', 'selected': " . a:idx . ", 'items': " . items . "}", getline(1))
+  call assert_equal(completed. "{'preinserted_text': '', 'pum_visible': 1, 'mode': 'keyword', 'selected': " . a:idx . ", 'items': " . items . "}", getline(1))
   bwipe!
   set completeopt& completefunc& complete&
 endfunc
@@ -5904,6 +5904,26 @@ func Test_autocomplete_longest()
   call DoTest("f", 'foobar', 2)
   call assert_equal(1, g:preinserted)
 
+  " complete_info()
+  %delete
+  func GetPreinsert()
+    let g:cinfo = complete_info(['preinserted_text'])
+    return ""
+  endfunc
+  inoremap <buffer><F6> <C-R>=GetPreinsert()<CR>
+  call setline(1, ["foo_bar_xyz", "foo__xyz"])
+
+  set completeopt& completeopt+=preinsert
+  call feedkeys("G4li\<F6>\<C-Y>", 'tx')
+  call assert_equal("bar_xyz", g:cinfo.preinserted_text)
+
+  set completeopt& completeopt+=longest
+  call feedkeys("Gof\<F6>\<ESC>", 'tx')
+  call assert_equal("oo_bar_xyz", g:cinfo.preinserted_text)
+  unlet g:cinfo
+  delfunc GetPreinsert
+  set completeopt&
+
   " Undo
   %delete _
   let &l:undolevels = &l:undolevels
diff --git a/src/testdir/test_popup.vim b/src/testdir/test_popup.vim
index f88cac29e514a7..330cbdf42c16c5 100644
--- a/src/testdir/test_popup.vim
+++ b/src/testdir/test_popup.vim
@@ -1163,6 +1163,7 @@ func Test_popup_complete_info_02()
     \     {'word': 'Apr', 'menu': 'April', 'user_data': '', 'info': '', 'kind': '', 'abbr': ''},
     \     {'word': 'May', 'menu': 'May', 'user_data': '', 'info': '', 'kind': '', 'abbr': ''}
     \   ],
+    \   'preinserted_text': '',
     \   'selected': 0,
     \ }
 
@@ -1170,7 +1171,7 @@ func Test_popup_complete_info_02()
   call feedkeys("i\<C-X>\<C-U>\<F5>", 'tx')
   call assert_equal(d, g:compl_info)
 
-  let g:compl_what = ['mode', 'pum_visible', 'selected']
+  let g:compl_what = ['mode', 'pum_visible', 'preinserted_text', 'selected']
   call remove(d, 'items')
   call feedkeys("i\<C-X>\<C-U>\<F5>", 'tx')
   call assert_equal(d, g:compl_info)
@@ -1178,6 +1179,7 @@ func Test_popup_complete_info_02()
   let g:compl_what = ['mode']
   call remove(d, 'selected')
   call remove(d, 'pum_visible')
+  call remove(d, 'preinserted_text')
   call feedkeys("i\<C-X>\<C-U>\<F5>", 'tx')
   call assert_equal(d, g:compl_info)
   bwipe!
@@ -1191,6 +1193,7 @@ func Test_popup_complete_info_no_pum()
         \   'mode': '',
         \   'pum_visible': 0,
         \   'items': [],
+        \   'preinserted_text': '',
         \   'selected': -1,
         \  }
   call assert_equal( d, complete_info() )
diff --git a/src/testdir/test_vim9_builtin.vim b/src/testdir/test_vim9_builtin.vim
index 4d537d38020a7d..c06672b2358e15 100644
--- a/src/testdir/test_vim9_builtin.vim
+++ b/src/testdir/test_vim9_builtin.vim
@@ -819,7 +819,7 @@ enddef
 def Test_complete_info()
   v9.CheckSourceDefAndScriptFailure(['complete_info("")'], ['E1013: Argument 1: type mismatch, expected list<string> but got string', 'E1211: List required for argument 1'])
   v9.CheckSourceDefAndScriptFailure(['complete_info({})'], ['E1013: Argument 1: type mismatch, expected list<string> but got dict<any>', 'E1211: List required for argument 1'])
-  assert_equal({'pum_visible': 0, 'mode': '', 'selected': -1, 'items': []}, complete_info())
+  assert_equal({'pum_visible': 0, 'mode': '', 'preinserted_text': '', 'selected': -1, 'items': []}, complete_info())
   assert_equal({'mode': '', 'items': []}, complete_info(['mode', 'items']))
 enddef