diff --git a/CHANGELOG.md b/CHANGELOG.md
index 271c437e2b2d..190f0af016fc 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,12 @@
 ##### Unreleased
 - [`Map` upsert stage 3 proposal](https://github.com/tc39/proposal-upsert):
   - Fixed [a FF `WeakMap.prototype.getOrInsertComputed` bug with callback calling before validation a key](https://bugzilla.mozilla.org/show_bug.cgi?id=1988369)
-- [`Iterator` chunking stage 2 proposal](https://github.com/tc39/proposal-iterator-chunking):
+- [`Iterator` chunking proposal](https://github.com/tc39/proposal-iterator-chunking):
+  - Built-ins:
+    - `Iterator.prototype.chunks`
+    - `Iterator.prototype.sliding`
+    - `Iterator.prototype.windows`
+  - Moved to stage 2.7, September 2025 TC39 meeting
   - `Iterator.prototype.sliding` method replaced with an extra parameter of `Iterator.prototype.windows` method, [tc39/proposal-iterator-chunking/#24](https://github.com/tc39/proposal-iterator-chunking/pull/24), [tc39/proposal-iterator-chunking/#26](https://github.com/tc39/proposal-iterator-chunking/pull/26)
 - Compat data improvements:
   - [`Map.prototype.{ getOrInsert, getOrInsertComputed }` and `WeakMap.prototype.getOrInsert`](https://github.com/tc39/proposal-upsert) marked as shipped from FF144
diff --git a/README.md b/README.md
index 7f7e29ab8ec5..a085ff12620d 100644
--- a/README.md
+++ b/README.md
@@ -172,6 +172,7 @@ structuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])
       - [`JSON.parse` source text access](#jsonparse-source-text-access)
       - [`Symbol.metadata` for decorators metadata proposal](#symbolmetadata-for-decorators-metadata-proposal)
     - [Stage 2.7 proposals](#stage-27-proposals)
+      - [`Iterator` chunking](#iterator-chunking)
       - [Joint iteration](#joint-iteration)
     - [Stage 2 proposals](#stage-2-proposals)
       - [`AsyncIterator` helpers](#asynciterator-helpers)
@@ -181,7 +182,6 @@ structuredClone(new Set([1, 2, 3])); // => new Set([1, 2, 3])
       - [`String.dedent`](#stringdedent)
       - [`Symbol` predicates](#symbol-predicates)
       - [`Symbol.customMatcher` for extractors](#symbolcustommatcher-for-extractors)
-      - [`Iterator` chunking](#iterator-chunking)
     - [Stage 1 proposals](#stage-1-proposals)
       - [`Observable`](#observable)
       - [New collections methods](#new-collections-methods)
@@ -2812,6 +2812,34 @@ core-js(-pure)/actual|full/function/metadata
 core-js(-pure)/stage/2.7
 ```
 
+##### [`Iterator` chunking](https://github.com/tc39/proposal-iterator-chunking)[⬆](#index)
+Modules [`esnext.iterator.chunks`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/esnext.iterator.chunks.js)
+and [`esnext.iterator.windows`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/esnext.iterator.windows.js)
+```ts
+class Iterator {
+  chunks(chunkSize: number): Iterator<any>;
+  windows(windowSize: number, undersized?: 'only-full' | 'allow-partial' | undefined): Iterator<any>;
+}
+```
+[*CommonJS entry points:*](#commonjs-api)
+```
+core-js/proposals/iterator-chunking-v2
+core-js(-pure)/full/iterator/chunks
+core-js(-pure)/full/iterator/windows
+```
+[*Examples*](https://tinyurl.com/24xnkcnn)
+```js
+const digits = () => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9].values();
+
+let chunks = Array.from(digits().chunks(2));  // [[0, 1], [2, 3], [4, 5], [6, 7], [8, 9]]
+
+let windows = Array.from(digits().windows(2));  // [[0, 1], [1, 2], [2, 3], [3, 4], [4, 5], [5, 6], [6, 7], [7, 8], [8, 9]]
+
+let windowsPartial = Array.from([0, 1].values().windows(3, 'allow-partial'));  // [[0, 1]]
+
+let windowsFull = Array.from([0, 1].values().windows(3));  // []
+```
+
 ##### [Joint iteration](https://github.com/tc39/proposal-joint-iteration)[⬆](#index)
 Modules [esnext.iterator.zip](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/esnext.iterator.zip.js), [esnext.iterator.zip-keyed](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/esnext.iterator.zip-keyed.js)
 ```ts
@@ -3067,34 +3095,6 @@ core-js/proposals/pattern-extractors
 core-js(-pure)/full/symbol/custom-matcher
 ```
 
-##### [`Iterator` chunking](https://github.com/tc39/proposal-iterator-chunking)[⬆](#index)
-Modules [`esnext.iterator.chunks`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/esnext.iterator.chunks.js)
-and [`esnext.iterator.windows`](https://github.com/zloirock/core-js/blob/master/packages/core-js/modules/esnext.iterator.windows.js)
-```ts
-class Iterator {
-  chunks(chunkSize: number): Iterator<any>;
-  windows(windowSize: number, undersized?: 'only-full' | 'allow-partial' | undefined): Iterator<any>;
-}
-```
-[*CommonJS entry points:*](#commonjs-api)
-```
-core-js/proposals/iterator-chunking-v2
-core-js(-pure)/full/iterator/chunks
-core-js(-pure)/full/iterator/windows
-```
-[*Examples*](https://tinyurl.com/24xnkcnn)
-```js
-const digits = () => [0, 1, 2, 3, 4, 5, 6, 7, 8, 9].values();
-
-let chunks = Array.from(digits().chunks(2));  // [[0, 1], [2, 3], [4, 5], [6, 7], [8, 9]]
-
-let windows = Array.from(digits().windows(2));  // [[0, 1], [1, 2], [2, 3], [3, 4], [4, 5], [5, 6], [6, 7], [7, 8], [8, 9]]
-
-let windowsPartial = Array.from([0, 1].values().windows(3, 'allow-partial'));  // [[0, 1]]
-
-let windowsFull = Array.from([0, 1].values().windows(3));  // []
-```
-
 #### Stage 1 proposals[⬆](#index)
 [*CommonJS entry points:*](#commonjs-api)
 ```
diff --git a/packages/core-js/stage/2.7.js b/packages/core-js/stage/2.7.js
index 9748eabcdd1f..25bf58ede7ea 100644
--- a/packages/core-js/stage/2.7.js
+++ b/packages/core-js/stage/2.7.js
@@ -1,6 +1,7 @@
 'use strict';
 var parent = require('./3');
 
+require('../proposals/iterator-chunking');
 require('../proposals/joint-iteration');
 
 module.exports = parent;
diff --git a/packages/core-js/stage/2.js b/packages/core-js/stage/2.js
index babb016e4099..6d0921b25f91 100644
--- a/packages/core-js/stage/2.js
+++ b/packages/core-js/stage/2.js
@@ -4,7 +4,6 @@ var parent = require('./2.7');
 require('../proposals/array-is-template-object');
 require('../proposals/async-iterator-helpers');
 require('../proposals/extractors');
-require('../proposals/iterator-chunking');
 require('../proposals/iterator-range');
 require('../proposals/string-dedent');
 require('../proposals/symbol-predicates-v2');