diff --git a/CHANGELOG.md b/CHANGELOG.md
index 74aec6d1b..f318d44c2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 ### Features
 
 - Expose `span_id` in `Span` constructor [#1945](https://github.com/getsentry/sentry-ruby/pull/1945)
+- Expose `end_timestamp` in `Span#finish` and `Transaction#finish` [#1946](https://github.com/getsentry/sentry-ruby/pull/1946)
 - Add OpenTelemetry support with new `sentry-opentelemetry` gem
   - Add `config.instrumenter` to switch between `:sentry` and `:otel` instrumentation [#1944](https://github.com/getsentry/sentry-ruby/pull/1944)
 
diff --git a/sentry-ruby/lib/sentry/span.rb b/sentry-ruby/lib/sentry/span.rb
index 9ca450e16..7e1baffd8 100644
--- a/sentry-ruby/lib/sentry/span.rb
+++ b/sentry-ruby/lib/sentry/span.rb
@@ -90,11 +90,8 @@ def initialize(
 
     # Finishes the span by adding a timestamp.
     # @return [self]
-    def finish
-      # already finished
-      return if @timestamp
-
-      @timestamp = Sentry.utc_now.to_f
+    def finish(end_timestamp: nil)
+      @timestamp = end_timestamp || @timestamp || Sentry.utc_now.to_f
       self
     end
 
diff --git a/sentry-ruby/lib/sentry/transaction.rb b/sentry-ruby/lib/sentry/transaction.rb
index 2a5ab0f0c..e237b5a9b 100644
--- a/sentry-ruby/lib/sentry/transaction.rb
+++ b/sentry-ruby/lib/sentry/transaction.rb
@@ -210,7 +210,7 @@ def set_initial_sample_decision(sampling_context:)
     # Finishes the transaction's recording and send it to Sentry.
     # @param hub [Hub] the hub that'll send this transaction. (Deprecated)
     # @return [TransactionEvent]
-    def finish(hub: nil)
+    def finish(hub: nil, end_timestamp: nil)
       if hub
         log_warn(
           <<~MSG
@@ -222,7 +222,7 @@ def finish(hub: nil)
 
       hub ||= @hub
 
-      super() # Span#finish doesn't take arguments
+      super(end_timestamp: end_timestamp)
 
       if @name.nil?
         @name = UNLABELD_NAME
diff --git a/sentry-ruby/spec/sentry/transaction_spec.rb b/sentry-ruby/spec/sentry/transaction_spec.rb
index 2d4716f66..da7f54a68 100644
--- a/sentry-ruby/spec/sentry/transaction_spec.rb
+++ b/sentry-ruby/spec/sentry/transaction_spec.rb
@@ -391,6 +391,16 @@
       expect(event[:transaction]).to eq("foo")
     end
 
+    it "finishes the transaction with explicit timestamp" do
+      timestamp = Sentry.utc_now.to_f
+      subject.finish(end_timestamp: timestamp)
+
+      expect(events.count).to eq(1)
+      event = events.last.to_hash
+
+      expect(event[:timestamp]).to eq(timestamp)
+    end
+
     it "assigns the transaction's tags" do
       Sentry.set_tags(name: "apple")