diff --git a/src/OpenTelemetry.Api/CHANGELOG.md b/src/OpenTelemetry.Api/CHANGELOG.md
index 9308df2245a..e595a1cf244 100644
--- a/src/OpenTelemetry.Api/CHANGELOG.md
+++ b/src/OpenTelemetry.Api/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.2.0-alpha3
+
+Released 2021-Sep-13
+
 * Static Baggage operations (`SetBaggage`, `RemoveBaggage`, & `ClearBaggage`)
   are now thread-safe. Instance-based Baggage operations no longer mutate
   `Baggage.Current` (breaking behavior change). For details see:
diff --git a/src/OpenTelemetry.Exporter.Console/CHANGELOG.md b/src/OpenTelemetry.Exporter.Console/CHANGELOG.md
index d25002518de..d6fff879d82 100644
--- a/src/OpenTelemetry.Exporter.Console/CHANGELOG.md
+++ b/src/OpenTelemetry.Exporter.Console/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.2.0-alpha3
+
+Released 2021-Sep-13
+
 ## 1.2.0-alpha2
 
 Released 2021-Aug-24
diff --git a/src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md b/src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md
index 7b6c20942e9..47a93c99fe1 100644
--- a/src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md
+++ b/src/OpenTelemetry.Exporter.InMemory/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.2.0-alpha3
+
+Released 2021-Sep-13
+
 ## 1.2.0-alpha2
 
 Released 2021-Aug-24
diff --git a/src/OpenTelemetry.Exporter.Jaeger/CHANGELOG.md b/src/OpenTelemetry.Exporter.Jaeger/CHANGELOG.md
index d549c6abe0c..0df9973e436 100644
--- a/src/OpenTelemetry.Exporter.Jaeger/CHANGELOG.md
+++ b/src/OpenTelemetry.Exporter.Jaeger/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.2.0-alpha3
+
+Released 2021-Sep-13
+
 * `JaegerExporterOptions.BatchExportProcessorOptions` is initialized with
   `BatchExportActivityProcessorOptions` which supports field value overriding
   using `OTEL_BSP_SCHEDULE_DELAY`, `OTEL_BSP_EXPORT_TIMEOUT`,
diff --git a/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md b/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md
index ac4e9f960ae..76b5920cc6b 100644
--- a/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md
+++ b/src/OpenTelemetry.Exporter.OpenTelemetryProtocol/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.2.0-alpha3
+
+Released 2021-Sep-13
+
 * `OtlpExporterOptions.BatchExportProcessorOptions` is initialized with
   `BatchExportActivityProcessorOptions` which supports field value overriding
   using `OTEL_BSP_SCHEDULE_DELAY`, `OTEL_BSP_EXPORT_TIMEOUT`,
diff --git a/src/OpenTelemetry.Exporter.Prometheus/CHANGELOG.md b/src/OpenTelemetry.Exporter.Prometheus/CHANGELOG.md
index 5a77f2433c8..6042a99e2e9 100644
--- a/src/OpenTelemetry.Exporter.Prometheus/CHANGELOG.md
+++ b/src/OpenTelemetry.Exporter.Prometheus/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.2.0-alpha3
+
+Released 2021-Sep-13
+
 * Bug fixes
   ([#2289](https://github.com/open-telemetry/opentelemetry-dotnet/issues/2289))
   ([#2309](https://github.com/open-telemetry/opentelemetry-dotnet/issues/2309))
diff --git a/src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md b/src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md
index 2607ba8dfe2..b0db090ef54 100644
--- a/src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md
+++ b/src/OpenTelemetry.Exporter.Zipkin/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.2.0-alpha3
+
+Released 2021-Sep-13
+
 * `ZipkinExporterOptions.BatchExportProcessorOptions` is initialized with
   `BatchExportActivityProcessorOptions` which supports field value overriding
   using `OTEL_BSP_SCHEDULE_DELAY`, `OTEL_BSP_EXPORT_TIMEOUT`,
diff --git a/src/OpenTelemetry/CHANGELOG.md b/src/OpenTelemetry/CHANGELOG.md
index 4a220a9c728..8459599b179 100644
--- a/src/OpenTelemetry/CHANGELOG.md
+++ b/src/OpenTelemetry/CHANGELOG.md
@@ -2,6 +2,10 @@
 
 ## Unreleased
 
+## 1.2.0-alpha3
+
+Released 2021-Sep-13
+
 * Metrics perf improvements, bug fixes.
   Replace MetricProcessor with MetricReader.
   ([#2306](https://github.com/open-telemetry/opentelemetry-dotnet/pull/2306))