diff --git a/src/ui/common/hooks/services/useExpansionVisibilityService.ts b/src/ui/common/hooks/services/useExpansionVisibilityService.ts
new file mode 100644
index 000000000..ca508d4a9
--- /dev/null
+++ b/src/ui/common/hooks/services/useExpansionVisibilityService.ts
@@ -0,0 +1,153 @@
+import { useCallback } from "react";
+
+import { useDelegationStorage } from "@/ui/common/hooks/storage/useDelegationStorage";
+import { useStakingExpansionState } from "@/ui/common/state/StakingExpansionState";
+import {
+  DelegationV2,
+  DelegationV2StakingState,
+} from "@/ui/common/types/delegationsV2";
+import { getExpansionsLocalStorageKey } from "@/ui/common/utils/local_storage/getExpansionsLocalStorageKey";
+
+/**
+ * Hook providing expansion visibility services.
+ * Centralizes complex logic for determining which delegations should be visible
+ * in different UI parts (Activity tab vs Verified Expansion Modal).
+ */
+export function useExpansionVisibilityService(
+  publicKeyNoCoord: string | undefined,
+) {
+  const { expansions } = useStakingExpansionState();
+
+  // Access expansion localStorage for broadcast status detection
+  const expansionStorageKey = getExpansionsLocalStorageKey(publicKeyNoCoord);
+
+  // Get pending delegations from localStorage to check broadcast status
+  const { delegations: expansionStorageDelegations } = useDelegationStorage(
+    expansionStorageKey,
+    expansions ?? [],
+  );
+
+  /**
+   * Checks if a delegation is a broadcasted expansion.
+   * A broadcasted expansion must meet both criteria:
+   * 1. Has VERIFIED status in the API data (delegation.state)
+   * 2. Has INTERMEDIATE_PENDING_VERIFICATION status in localStorage (user broadcasted it)
+   */
+  const isBroadcastedExpansion = useCallback(
+    (delegation: DelegationV2): boolean => {
+      // First, verify this is actually VERIFIED in the API data
+      if (delegation.state !== DelegationV2StakingState.VERIFIED) {
+        return false;
+      }
+
+      // Then check if this delegation exists in localStorage with INTERMEDIATE_PENDING_VERIFICATION status
+      const storedDelegation = (expansionStorageDelegations ?? []).find(
+        (stored) =>
+          stored.stakingTxHashHex.toLowerCase() ===
+          delegation.stakingTxHashHex.toLowerCase(),
+      );
+
+      return (
+        storedDelegation?.state ===
+        DelegationV2StakingState.INTERMEDIATE_PENDING_VERIFICATION
+      );
+    },
+    [expansionStorageDelegations],
+  );
+
+  /**
+   * Checks if an original staking transaction should be hidden.
+   * Original staking transactions are hidden when they have broadcasted expansions.
+   */
+  const isOriginalTransactionHidden = useCallback(
+    (stakeHashHex: string, delegations: DelegationV2[]): boolean => {
+      // Find any expansion that references this original transaction
+      const relatedExpansions = delegations.filter(
+        (delegation) =>
+          delegation.previousStakingTxHashHex === stakeHashHex &&
+          isBroadcastedExpansion(delegation),
+      );
+
+      return relatedExpansions.length > 0;
+    },
+    [isBroadcastedExpansion],
+  );
+
+  /**
+   * Returns delegations that should be visible in the Activity tab.
+   * Applies the following rules:
+   * 1. Exclude VERIFIED expansions that are not broadcasted (show in modal only)
+   * 2. Include VERIFIED expansions that are broadcasted (INTERMEDIATE_PENDING_VERIFICATION)
+   * 3. Exclude original transactions that have broadcasted expansions
+   * 4. Include all other regular transactions
+   */
+  const getActivityTabDelegations = useCallback(
+    (delegations: DelegationV2[]): DelegationV2[] => {
+      // Performance optimization: Pre-compute hidden transaction IDs to avoid O^2 complexity
+      const hiddenOriginalTxIds = new Set<string>();
+
+      // First pass: identify all original transactions that should be hidden
+      delegations.forEach((delegation) => {
+        if (
+          delegation.previousStakingTxHashHex &&
+          isBroadcastedExpansion(delegation)
+        ) {
+          hiddenOriginalTxIds.add(
+            delegation.previousStakingTxHashHex.toLowerCase(),
+          );
+        }
+      });
+
+      // Second pass: filter delegations using O(1) Set lookups
+      return delegations.filter((delegation) => {
+        // Always exclude EXPANDED state delegations (existing logic)
+        if (delegation.state === DelegationV2StakingState.EXPANDED) {
+          return false;
+        }
+
+        // Handle VERIFIED expansions
+        if (
+          delegation.state === DelegationV2StakingState.VERIFIED &&
+          delegation.previousStakingTxHashHex
+        ) {
+          // Only include if it's been broadcasted by the user
+          return isBroadcastedExpansion(delegation);
+        }
+
+        // Check if this is an original transaction that should be hidden (O(1) lookup)
+        if (
+          hiddenOriginalTxIds.has(delegation.stakingTxHashHex.toLowerCase())
+        ) {
+          return false;
+        }
+
+        // Include all other transactions
+        return true;
+      });
+    },
+    [isBroadcastedExpansion],
+  );
+
+  /**
+   * Returns delegations that should be visible in the Verified Expansion Modal.
+   * These are VERIFIED expansions with previousStakingTxHashHex that haven't been broadcasted yet.
+   */
+  const getVerifiedExpansionModalDelegations = useCallback(
+    (delegations: DelegationV2[]): DelegationV2[] => {
+      return delegations.filter(
+        (delegation) =>
+          delegation.state === DelegationV2StakingState.VERIFIED &&
+          delegation.previousStakingTxHashHex &&
+          !isBroadcastedExpansion(delegation),
+      );
+    },
+    [isBroadcastedExpansion],
+  );
+
+  return {
+    getActivityTabDelegations,
+    getVerifiedExpansionModalDelegations,
+    isOriginalTransactionHidden,
+    isBroadcastedExpansion,
+  };
+}
diff --git a/src/ui/common/utils/local_storage/getExpansionsLocalStorageKey.ts b/src/ui/common/utils/local_storage/getExpansionsLocalStorageKey.ts
index e92f9e845..12a7e799c 100644
--- a/src/ui/common/utils/local_storage/getExpansionsLocalStorageKey.ts
+++ b/src/ui/common/utils/local_storage/getExpansionsLocalStorageKey.ts
@@ -2,7 +2,10 @@ import { network } from "@/ui/common/config/network/btc";
 
 const EXPANSIONS_KEY = "bbn-staking-expansions";
 
+// Safe no-op key to prevent potential issues with empty string
+const NO_KEY = "__NO_KEY__";
+
 // Get the local storage key for staking expansions
-export const getExpansionsLocalStorageKey = (pk: string) => {
-  return pk ? `${EXPANSIONS_KEY}-${network}-${pk}` : "";
+export const getExpansionsLocalStorageKey = (pk: string | undefined) => {
+  return pk ? `${EXPANSIONS_KEY}-${network}-${pk}` : NO_KEY;
 };