diff --git a/CHANGELOG.md b/CHANGELOG.md
index 0fe9d8de5..73de1483b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Improved the check for duplicates in the preview step of the activities import (regardless of the account)
 - Improved the check for duplicates in the preview step of the import dividends dialog (regardless of the account)
 - Extended the activities import to reuse an existing account of the user by name and currency
+- Extended the activities import to resolve an ISIN to the symbol of the data provider
 
 ### Fixed
 
diff --git a/apps/api/src/app/import/import.service.ts b/apps/api/src/app/import/import.service.ts
index a9cde1544..1bc164686 100644
--- a/apps/api/src/app/import/import.service.ts
+++ b/apps/api/src/app/import/import.service.ts
@@ -40,6 +40,7 @@ import {
 import { Injectable } from '@nestjs/common';
 import { Account, DataSource, Prisma } from '@prisma/client';
 import { Big } from 'big.js';
+import { isISIN } from 'class-validator';
 import { endOfToday, isAfter, isSameSecond, parseISO } from 'date-fns';
 import { omit, uniqBy } from 'lodash';
 import { randomUUID } from 'node:crypto';
@@ -240,6 +241,59 @@ export class ImportService {
       }
     }
 
+    // Resolve the symbols with an ISIN to the symbol of the data provider
+    // before the asset profiles are created and the duplicates are detected
+    const assetProfileIdentifiersWithIsin: AssetProfileIdentifier[] = uniqBy(
+      [...(assetProfilesWithMarketDataDto ?? []), ...activitiesDto]
+        .filter(({ dataSource, symbol }) => {
+          return dataSource !== DataSource.MANUAL && isISIN(symbol);
+        })
+        .map(({ dataSource, symbol }) => {
+          return { dataSource, symbol };
+        }),
+      getAssetProfileIdentifier
+    );
+
+    const resolvedAssetProfileIdentifiers = await Promise.all(
+      assetProfileIdentifiersWithIsin.map(async ({ dataSource, symbol }) => {
+        try {
+          const assetProfile = await this.dataProviderService
+            .getDataProvider(dataSource)
+            .getAssetProfile({ symbol });
+
+          return { dataSource, symbol, resolvedSymbol: assetProfile?.symbol };
+        } catch {
+          return { dataSource, symbol, resolvedSymbol: undefined };
+        }
+      })
+    );
+
+    for (const {
+      dataSource,
+      resolvedSymbol,
+      symbol
+    } of resolvedAssetProfileIdentifiers) {
+      if (!resolvedSymbol || resolvedSymbol === symbol) {
+        continue;
+      }
+
+      for (const activity of activitiesDto) {
+        if (activity.dataSource === dataSource && activity.symbol === symbol) {
+          activity.symbol = resolvedSymbol;
+        }
+      }
+
+      for (const assetProfileWithMarketData of assetProfilesWithMarketDataDto ??
+        []) {
+        if (
+          assetProfileWithMarketData.dataSource === dataSource &&
+          assetProfileWithMarketData.symbol === symbol
+        ) {
+          assetProfileWithMarketData.symbol = resolvedSymbol;
+        }
+      }
+    }
+
     if (platformsDto?.length) {
       const canCreatePlatform = hasPermission(
         user.permissions,