diff --git a/.changeset/preserve-async-derived-memo.md b/.changeset/preserve-async-derived-memo.md
new file mode 100644
index 0000000000..f65907966e
--- /dev/null
+++ b/.changeset/preserve-async-derived-memo.md
@@ -0,0 +1,5 @@
+---
+'svelte': patch
+---
+
+fix(runes): preserve derived memoization during async batch reading (#18503)
diff --git a/packages/svelte/src/internal/client/runtime.js b/packages/svelte/src/internal/client/runtime.js
index 188d16a820..5a2ac09ead 100644
--- a/packages/svelte/src/internal/client/runtime.js
+++ b/packages/svelte/src/internal/client/runtime.js
@@ -672,7 +672,7 @@ export function get(signal) {
 
 		var is_new = (derived.f & REACTION_RAN) === 0;
 
-		if (is_dirty(derived)) {
+		if (is_dirty(derived) && (!batch_values?.has(derived) || current_batch?.is_fork)) {
 			if (should_connect) {
 				// set the flag before `update_derived`, so that the derived
 				// is added as a reaction to its dependencies