diff --git a/CHANGELOG b/CHANGELOG
index c42c315970..307b2d82de 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,19 @@
+swift (2.35.1, epoxy stable backports)
+
+    * S3 API
+
+      * Added support for aws-chunked transfers. Recent AWS clients recently
+        began defaulting to this mode. See also:
+        https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-streaming.html
+
+      * Added support for verifying additional checksums during upload. All
+        algorithms currently supported by AWS are supported: CRC64NVME,
+        CRC32, CRC32C, SHA1, and SHA256. See also:
+        https://docs.aws.amazon.com/AmazonS3/latest/userguide/checking-object-integrity.html
+        Note that some algorithms require the availability of additional
+        libraries: ISA-L or anycrc.
+
+
 swift (2.35.0, OpenStack Epoxy)
 
     * Removed the use of `eval` in the xprofile middleware. Note that this
diff --git a/releasenotes/notes/release-2.35.1-58d9d52dfe46ee4d.yaml b/releasenotes/notes/release-2.35.1-58d9d52dfe46ee4d.yaml
new file mode 100644
index 0000000000..9d23c57f22
--- /dev/null
+++ b/releasenotes/notes/release-2.35.1-58d9d52dfe46ee4d.yaml
@@ -0,0 +1,16 @@
+---
+features:
+  - |
+    S3 API
+
+    * Added support for aws-chunked transfers. Recent AWS clients recently
+      began defaulting to this mode. See `Amazon's documentation
+      <https://docs.aws.amazon.com/AmazonS3/latest/API/sigv4-streaming.html>`__.
+
+    * Added support for verifying additional checksums during upload. All
+      algorithms currently supported by AWS are supported: ``CRC64NVME``,
+      ``CRC32``, ``CRC32C``, ``SHA1``, and ``SHA256``. See `Amazon's documentation
+      <https://docs.aws.amazon.com/AmazonS3/latest/userguide/checking-object-integrity.html>`__.
+      Note that some algorithms require the availability of additional
+      libraries: `ISA-L <https://github.com/intel/isa-l>`__ or
+      `anycrc <https://pypi.org/project/anycrc>`__.