diff --git a/experimental/CHANGELOG.md b/experimental/CHANGELOG.md
index 4a2abad384..c46df852a2 100644
--- a/experimental/CHANGELOG.md
+++ b/experimental/CHANGELOG.md
@@ -10,6 +10,7 @@ All notable changes to experimental packages in this project will be documented
 ### :rocket: (Enhancement)
 
 * refactor(instrumentation-fetch): move fetch to use SEMATRR [#4632](https://github.com/open-telemetry/opentelemetry-js/pull/4632)
+* refactor(otlp-transformer): use explicit exports [#4785](https://github.com/open-telemetry/opentelemetry-js/pull/4785) @pichlermarc
 
 ### :bug: (Bug Fix)
 
diff --git a/experimental/packages/otlp-transformer/src/index.ts b/experimental/packages/otlp-transformer/src/index.ts
index 66040a07c0..12c1cadc87 100644
--- a/experimental/packages/otlp-transformer/src/index.ts
+++ b/experimental/packages/otlp-transformer/src/index.ts
@@ -14,12 +14,71 @@
  * limitations under the License.
  */
 
-export * from './common/types';
-export * from './common';
-export * from './metrics/types';
-export * from './resource/types';
-export * from './trace/types';
-export * from './logs/types';
+export {
+  OtlpEncodingOptions,
+  IKeyValueList,
+  IKeyValue,
+  IInstrumentationScope,
+  IArrayValue,
+  LongBits,
+  IAnyValue,
+  Fixed64,
+} from './common/types';
+export {
+  SpanContextEncodeFunction,
+  toLongBits,
+  OptionalSpanContextEncodeFunction,
+  getOtlpEncoder,
+  Encoder,
+  HrTimeEncodeFunction,
+  encodeAsLongBits,
+  encodeAsString,
+  hrTimeToNanos,
+} from './common';
+export {
+  IExportMetricsPartialSuccess,
+  IValueAtQuantile,
+  ISummaryDataPoint,
+  ISummary,
+  ISum,
+  IScopeMetrics,
+  IResourceMetrics,
+  INumberDataPoint,
+  IHistogramDataPoint,
+  IHistogram,
+  IExponentialHistogramDataPoint,
+  IExponentialHistogram,
+  IMetric,
+  IGauge,
+  IExemplar,
+  EAggregationTemporality,
+  IExportMetricsServiceRequest,
+  IExportMetricsServiceResponse,
+  IBuckets,
+} from './metrics/types';
+export { IResource } from './resource/types';
+export {
+  IExportTracePartialSuccess,
+  IStatus,
+  EStatusCode,
+  ILink,
+  IEvent,
+  IScopeSpans,
+  ISpan,
+  IResourceSpans,
+  ESpanKind,
+  IExportTraceServiceResponse,
+  IExportTraceServiceRequest,
+} from './trace/types';
+export {
+  IExportLogsServiceResponse,
+  IScopeLogs,
+  IExportLogsServiceRequest,
+  IResourceLogs,
+  ILogRecord,
+  IExportLogsPartialSuccess,
+  ESeverityNumber,
+} from './logs/types';
 
 export { createExportTraceServiceRequest } from './trace';
 export { createExportMetricsServiceRequest } from './metrics';