diff --git a/CHANGELOG.md b/CHANGELOG.md
index da99d3741e..769806e71c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -12,6 +12,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - Deprecated the `api/v1/admin/user`, `api/v1/user/:id` and `api/v1/user/:id/access-token` endpoints in favor of the `api/v1/users` endpoints
 - Upgraded `chart.js` from version `4.5.1` to `4.6.1`
 
+### Fixed
+
+- Fixed the overwrite of `countries`, `holdings` and `sectors` with empty values in the data gathering of asset profiles
+- Fixed the validation of the responses in the data enhancer for asset profile data via _Trackinsight_
+
 ## 3.95.0 - 2026-10-31
 
 ### Changed
diff --git a/apps/api/src/services/data-provider/data-enhancer/trackinsight/trackinsight.service.spec.ts b/apps/api/src/services/data-provider/data-enhancer/trackinsight/trackinsight.service.spec.ts
new file mode 100644
index 0000000000..8f6720fddf
--- /dev/null
+++ b/apps/api/src/services/data-provider/data-enhancer/trackinsight/trackinsight.service.spec.ts
@@ -0,0 +1,358 @@
+import { Logger } from '@nestjs/common';
+
+import { TrackinsightDataEnhancerService } from './trackinsight.service';
+
+jest.mock('@ghostfolio/api/services/fetch/fetch.service', () => {
+  return {
+    FetchService: jest.fn()
+  };
+});
+
+const FAILURE_MESSAGE = {
+  _failure_reason: 'http_error',
+  error: 'HTTP 405: Method Not Allowed',
+  http_status: 405,
+  status: 'failed',
+  url: 'https://www.trackinsight.com/data-api/holdings/QQQ.json'
+};
+
+const FUND = {
+  cusip: '46090E103',
+  isins: ['US46090E1038', 'US46090E3018'],
+  ticker: 'QQQ'
+};
+
+const HOLDINGS = {
+  countries: {
+    Other: { count: 1, weight: 0.01 },
+    USA: { count: 99, weight: 0.99 }
+  },
+  sectors: {
+    Financials: { count: 10, weight: 0.2 },
+    'Information Technology': { count: 90, weight: 0.8 }
+  },
+  topHoldings: [
+    { label: 'NVIDIA Corp.', weight: 0.08 },
+    { label: 'Other', weight: 0.92 }
+  ],
+  weight: 0.9999
+};
+
+const SEARCH_RESULT = {
+  results: { count: 221, docs: [{ ticker: 'QQQ' }], words: ['qqq'] }
+};
+
+describe('TrackinsightDataEnhancerService', () => {
+  let fetchService: { fetch: jest.Mock };
+  let trackinsightDataEnhancerService: TrackinsightDataEnhancerService;
+
+  const enhance = (response = {}, symbol = 'QQQ') => {
+    return trackinsightDataEnhancerService.enhance({
+      symbol,
+      requestTimeout: 1000,
+      response: { assetClass: 'EQUITY', assetSubClass: 'ETF', ...response }
+    });
+  };
+
+  const mockResponses = ({
+    fund = Response.json(FUND),
+    holdings = Response.json(HOLDINGS),
+    search = Response.json(SEARCH_RESULT)
+  }: {
+    fund?: Response | Error;
+    holdings?: Response | Error;
+    search?: Response | Error;
+  }) => {
+    fetchService.fetch.mockImplementation((url: string) => {
+      let result = fund;
+
+      if (url.includes('/search-api/')) {
+        result = search;
+      } else if (url.includes('/data-api/holdings/')) {
+        result = holdings;
+      }
+
+      return result instanceof Error
+        ? Promise.reject(result)
+        : Promise.resolve(result.clone());
+    });
+  };
+
+  beforeEach(() => {
+    fetchService = { fetch: jest.fn() };
+
+    trackinsightDataEnhancerService = new TrackinsightDataEnhancerService(
+      null,
+      fetchService as any
+    );
+  });
+
+  it('should skip an asset which is not a fund', async () => {
+    const response = await enhance({ assetSubClass: 'STOCK' });
+
+    expect(fetchService.fetch).not.toHaveBeenCalled();
+    expect(response.countries).toBeUndefined();
+  });
+
+  it('should enhance the asset profile with a valid response', async () => {
+    mockResponses({});
+
+    await expect(enhance()).resolves.toEqual({
+      assetClass: 'EQUITY',
+      assetSubClass: 'ETF',
+      countries: [{ code: 'US', weight: 0.99 }],
+      cusip: '46090E103',
+      holdings: [{ name: 'NVIDIA Corp.', weight: 0.08 }],
+      isin: 'US46090E1038',
+      sectors: [
+        { name: 'Financial Services', weight: 0.2 },
+        { name: 'Technology', weight: 0.8 }
+      ]
+    });
+  });
+
+  it('should keep the lists of the data provider', async () => {
+    mockResponses({});
+
+    const countries = [{ code: 'DE', weight: 1 }];
+    const holdings = [{ name: 'SAP SE', weight: 1 }];
+    const sectors = [{ name: 'Technology', weight: 1 }];
+
+    const response = await enhance({ countries, holdings, sectors });
+
+    expect(response.countries).toEqual(countries);
+    expect(response.holdings).toEqual(holdings);
+    expect(response.sectors).toEqual(sectors);
+  });
+
+  it('should encode the symbol in the URL of the search', async () => {
+    mockResponses({
+      search: Response.json({ results: { count: 0, docs: [] } })
+    });
+
+    await enhance({}, 'BRK/B');
+
+    expect(fetchService.fetch.mock.calls[0][0]).toContain(
+      '/search_v2/BRK%2FB/'
+    );
+  });
+
+  it.each([
+    ['a failed request', new Error('The operation timed out')],
+    ['an error status', new Response(null, { status: 405 })],
+    ['a body which is not JSON', new Response('<html></html>')],
+    ['a failure message', Response.json(FAILURE_MESSAGE)],
+    ['a false tool call', Response.json({ url: 'https://www.example.com' })]
+  ])(
+    'should not change the asset profile on %s in the search',
+    async (_, search) => {
+      mockResponses({ search });
+
+      await expect(enhance()).resolves.toEqual({
+        assetClass: 'EQUITY',
+        assetSubClass: 'ETF'
+      });
+    }
+  );
+
+  it('should not use a search result without a ticker', async () => {
+    mockResponses({
+      search: Response.json({ results: { count: 1, docs: [{}] } })
+    });
+
+    await enhance();
+
+    expect(fetchService.fetch).toHaveBeenCalledTimes(1);
+  });
+
+  it.each([
+    ['a single result', 1, 'QQQ.US'],
+    ['an exact match', 2, 'QQQ'],
+    ['a match with an exchange', 2, 'XETRA:QQQ']
+  ])('should use the ticker of %s in the search', async (_, count, ticker) => {
+    mockResponses({
+      search: Response.json({ results: { count, docs: [{ ticker }] } })
+    });
+
+    await enhance();
+
+    expect(fetchService.fetch.mock.calls[1][0]).toContain(
+      `/data-api/funds/${ticker}.json`
+    );
+  });
+
+  it('should not use a search result with another ticker', async () => {
+    mockResponses({
+      search: Response.json({
+        results: { count: 2, docs: [{ ticker: 'QQQ.US' }] }
+      })
+    });
+
+    await enhance();
+
+    expect(fetchService.fetch).toHaveBeenCalledTimes(1);
+  });
+
+  it('should search again without the suffix of the symbol', async () => {
+    mockResponses({
+      search: Response.json({
+        results: { count: 2, docs: [{ ticker: 'VWCE' }] }
+      })
+    });
+
+    await enhance({}, 'VWCE.DE');
+
+    const urls = fetchService.fetch.mock.calls.map(([url]) => {
+      return url;
+    });
+
+    expect(urls[0]).toContain('/search_v2/VWCE.DE/');
+    expect(urls[1]).toContain('/search_v2/VWCE/');
+    expect(urls[2]).toContain('/data-api/funds/VWCE.json');
+  });
+
+  it.each([
+    ['a failed request', new Error('The operation timed out')],
+    ['an error status', new Response(null, { status: 502 })],
+    ['a body which is not JSON', new Response('`AccessDenied`Access Denied')],
+    ['a failure message', Response.json(FAILURE_MESSAGE)],
+    ['a missing weight', Response.json({ ...HOLDINGS, weight: undefined })],
+    [
+      'a weight which is not a number',
+      Response.json({ ...HOLDINGS, weight: '1' })
+    ],
+    [
+      'a weight below the threshold',
+      Response.json({ ...HOLDINGS, weight: 0.5 })
+    ],
+    ['a weight above the maximum', Response.json({ ...HOLDINGS, weight: 1.5 })],
+    [
+      'an invalid weight of a country',
+      Response.json({ ...HOLDINGS, countries: { USA: { weight: 99 } } })
+    ],
+    [
+      'an invalid weight of a sector',
+      Response.json({ ...HOLDINGS, sectors: { Materials: { weight: -0.1 } } })
+    ],
+    [
+      'an invalid item of the top holdings',
+      Response.json({ ...HOLDINGS, topHoldings: [{ weight: 0.1 }] })
+    ],
+    [
+      'top holdings which are not a list',
+      Response.json({ ...HOLDINGS, topHoldings: 'NVIDIA Corp.' })
+    ],
+    [
+      'countries which are not an object',
+      Response.json({ ...HOLDINGS, countries: [{ weight: 0.5 }] })
+    ],
+    [
+      'sectors which are not an object',
+      Response.json({ ...HOLDINGS, sectors: [{ weight: 0.5 }] })
+    ]
+  ])('should not add lists on %s in the holdings', async (_, holdings) => {
+    mockResponses({ holdings });
+
+    const response = await enhance();
+
+    expect(response).not.toHaveProperty('countries');
+    expect(response).not.toHaveProperty('holdings');
+    expect(response).not.toHaveProperty('sectors');
+  });
+
+  it('should keep the cusip and the isin if the holdings fail', async () => {
+    mockResponses({ holdings: Response.json(FAILURE_MESSAGE) });
+
+    const response = await enhance();
+
+    expect(response.cusip).toBe('46090E103');
+    expect(response.isin).toBe('US46090E1038');
+  });
+
+  it('should not report a failed request as an invalid response', async () => {
+    const warn = jest.spyOn(Logger.prototype, 'warn').mockImplementation();
+
+    mockResponses({ holdings: new Response(null, { status: 502 }) });
+
+    await enhance();
+
+    expect(warn).toHaveBeenCalledTimes(1);
+    expect(warn).toHaveBeenCalledWith(
+      expect.stringContaining('HTTP status 502')
+    );
+
+    warn.mockRestore();
+  });
+
+  it('should set empty lists on a valid response without items', async () => {
+    mockResponses({
+      holdings: Response.json({
+        countries: {},
+        sectors: {},
+        topHoldings: [],
+        weight: 1
+      })
+    });
+
+    const response = await enhance();
+
+    expect(response.countries).toEqual([]);
+    expect(response.holdings).toEqual([]);
+    expect(response.sectors).toEqual([]);
+  });
+
+  it('should use the other lists if the top holdings are null', async () => {
+    mockResponses({
+      holdings: Response.json({ ...HOLDINGS, topHoldings: null })
+    });
+
+    const response = await enhance();
+
+    expect(response.countries).toEqual([{ code: 'US', weight: 0.99 }]);
+    expect(response.holdings).toEqual([]);
+    expect(response.sectors).toEqual([
+      { name: 'Financial Services', weight: 0.2 },
+      { name: 'Technology', weight: 0.8 }
+    ]);
+  });
+
+  it('should use the other lists if the countries are null', async () => {
+    mockResponses({
+      holdings: Response.json({ ...HOLDINGS, countries: null })
+    });
+
+    const response = await enhance();
+
+    expect(response.countries).toEqual([]);
+    expect(response.holdings).toEqual([{ name: 'NVIDIA Corp.', weight: 0.08 }]);
+  });
+
+  it('should accept floating point noise in a weight', async () => {
+    mockResponses({
+      holdings: Response.json({
+        ...HOLDINGS,
+        countries: { USA: { weight: 1.0000000000000002 } },
+        weight: 1.0000000000000002
+      })
+    });
+
+    const response = await enhance();
+
+    expect(response.countries).toEqual([
+      { code: 'US', weight: 1.0000000000000002 }
+    ]);
+  });
+
+  it.each([
+    ['a failure message', Response.json(FAILURE_MESSAGE)],
+    ['an invalid cusip and isins', Response.json({ cusip: 1, isins: 'US' })],
+    ['a non-string isin', Response.json({ isins: [1] })]
+  ])('should not set the cusip or the isin on %s', async (_, fund) => {
+    mockResponses({ fund });
+
+    const response = await enhance();
+
+    expect(response).not.toHaveProperty('cusip');
+    expect(response).not.toHaveProperty('isin');
+  });
+});
diff --git a/apps/api/src/services/data-provider/data-enhancer/trackinsight/trackinsight.service.ts b/apps/api/src/services/data-provider/data-enhancer/trackinsight/trackinsight.service.ts
index aa61c048c7..6956e8cf75 100644
--- a/apps/api/src/services/data-provider/data-enhancer/trackinsight/trackinsight.service.ts
+++ b/apps/api/src/services/data-provider/data-enhancer/trackinsight/trackinsight.service.ts
@@ -10,6 +10,7 @@ import { SectorName } from '@ghostfolio/common/types';
 
 import { Injectable, Logger } from '@nestjs/common';
 import { SymbolProfile } from '@prisma/client';
+import { isPlainObject } from 'lodash-es';
 
 @Injectable()
 export class TrackinsightDataEnhancerService implements DataEnhancerInterface {
@@ -36,6 +37,9 @@ export class TrackinsightDataEnhancerService implements DataEnhancerInterface {
     Materials: 'Basic Materials'
   };
 
+  // Allows for floating point noise in the sums of Trackinsight
+  private static weightTolerance = 0.001;
+
   private readonly logger = new Logger(TrackinsightDataEnhancerService.name);
 
   public constructor(
@@ -75,44 +79,42 @@ export class TrackinsightDataEnhancerService implements DataEnhancerInterface {
       return response;
     }
 
-    const profile = await this.fetchService
-      .fetch(
-        `${TrackinsightDataEnhancerService.baseUrl}/data-api/funds/${trackinsightSymbol}.json`,
-        {
-          signal: AbortSignal.timeout(requestTimeout)
-        }
-      )
-      .then((res) => res.json())
-      .catch(() => {
-        return {};
-      });
+    const profile = await this.fetchJson({
+      requestTimeout,
+      url: `${TrackinsightDataEnhancerService.baseUrl}/data-api/funds/${trackinsightSymbol}.json`
+    });
 
     const cusip = profile?.cusip;
 
-    if (cusip) {
+    if (cusip && typeof cusip === 'string') {
       response.cusip = cusip;
     }
 
-    const isin = profile?.isins?.[0];
+    const isin = Array.isArray(profile?.isins) ? profile.isins[0] : undefined;
 
-    if (isin) {
+    if (isin && typeof isin === 'string') {
       response.isin = isin;
     }
 
-    const holdings = await this.fetchService
-      .fetch(
-        `${TrackinsightDataEnhancerService.baseUrl}/data-api/holdings/${trackinsightSymbol}.json`,
-        {
-          signal: AbortSignal.timeout(requestTimeout)
-        }
-      )
-      .then((res) => res.json())
-      .catch(() => {
-        return {};
-      });
+    const holdings = await this.fetchJson({
+      requestTimeout,
+      url: `${TrackinsightDataEnhancerService.baseUrl}/data-api/holdings/${trackinsightSymbol}.json`
+    });
+
+    if (!holdings) {
+      return response;
+    }
+
+    if (!this.isValidHoldings(holdings)) {
+      this.logger.warn(
+        `Could not use the Trackinsight holdings of "${trackinsightSymbol}": Invalid response`
+      );
+
+      return response;
+    }
 
     if (
-      holdings?.weight < TrackinsightDataEnhancerService.holdingsWeightTreshold
+      holdings.weight < TrackinsightDataEnhancerService.holdingsWeightTreshold
     ) {
       // Skip if data is inaccurate
       return response;
@@ -125,7 +127,7 @@ export class TrackinsightDataEnhancerService implements DataEnhancerInterface {
       response.countries = [];
 
       for (const [name, value] of Object.entries<any>(
-        holdings?.countries ?? {}
+        holdings.countries ?? {}
       )) {
         const code = getCountryCodeByName({
           name,
@@ -145,8 +147,8 @@ export class TrackinsightDataEnhancerService implements DataEnhancerInterface {
     ) {
       response.holdings = [];
 
-      for (const { label, weight } of holdings?.topHoldings ?? []) {
-        if (label?.toLowerCase() === 'other') {
+      for (const { label, weight } of holdings.topHoldings ?? []) {
+        if (label.toLowerCase() === 'other') {
           continue;
         }
 
@@ -163,9 +165,7 @@ export class TrackinsightDataEnhancerService implements DataEnhancerInterface {
     ) {
       response.sectors = [];
 
-      for (const [name, value] of Object.entries<any>(
-        holdings?.sectors ?? {}
-      )) {
+      for (const [name, value] of Object.entries<any>(holdings.sectors ?? {})) {
         response.sectors.push({
           name: getSectorName({
             name,
@@ -187,46 +187,113 @@ export class TrackinsightDataEnhancerService implements DataEnhancerInterface {
     return 'QQQ';
   }
 
-  private async searchTrackinsightSymbol({
+  private async fetchJson({
     requestTimeout,
-    symbol
+    url
   }: {
     requestTimeout: number;
-    symbol: string;
+    url: string;
   }) {
     return this.fetchService
-      .fetch(
-        `${TrackinsightDataEnhancerService.baseUrl}/search-api/search_v2/${symbol}/_/ticker/default/0/3`,
-        {
-          signal: AbortSignal.timeout(requestTimeout)
-        }
-      )
-      .then((res) => res.json())
-      .then((jsonRes) => {
-        if (
-          jsonRes['results']?.['count'] === 1 ||
-          // Allow exact match
-          jsonRes['results']?.['docs']?.[0]?.['ticker'] === symbol ||
-          // Allow EXCHANGE:SYMBOL
-          jsonRes['results']?.['docs']?.[0]?.['ticker']?.endsWith(`:${symbol}`)
-        ) {
-          return jsonRes['results']['docs'][0]['ticker'];
+      .fetch(url, {
+        signal: AbortSignal.timeout(requestTimeout)
+      })
+      .then((res) => {
+        if (!res.ok) {
+          throw new Error(`HTTP status ${res.status}`);
         }
 
-        this.logger.debug(
-          `Could not match a Trackinsight symbol for "${symbol}": ${JSON.stringify(
-            jsonRes
-          )}`
-        );
-
-        return undefined;
+        return res.json();
       })
       .catch(({ message }) => {
-        this.logger.warn(
-          `Could not search Trackinsight symbol for "${symbol}": ${message}`
-        );
+        this.logger.warn(`Could not fetch ${url}: ${message}`);
 
         return undefined;
       });
   }
+
+  private isValidHoldings(holdings: any) {
+    if (!this.isValidWeight(holdings?.weight)) {
+      return false;
+    }
+
+    const { countries, sectors, topHoldings } = holdings;
+
+    if (
+      !isPlainObject(countries ?? {}) ||
+      !isPlainObject(sectors ?? {}) ||
+      !Array.isArray(topHoldings ?? [])
+    ) {
+      return false;
+    }
+
+    return (
+      Object.values<any>(countries ?? {}).every((country) => {
+        return this.isValidWeight(country?.weight);
+      }) &&
+      Object.values<any>(sectors ?? {}).every((sector) => {
+        return this.isValidWeight(sector?.weight);
+      }) &&
+      (topHoldings ?? []).every((topHolding) => {
+        return (
+          typeof topHolding?.label === 'string' &&
+          this.isValidWeight(topHolding?.weight)
+        );
+      })
+    );
+  }
+
+  private isValidWeight(weight: unknown) {
+    return (
+      typeof weight === 'number' &&
+      weight >= 0 &&
+      weight <= 1 + TrackinsightDataEnhancerService.weightTolerance
+    );
+  }
+
+  private async searchTrackinsightSymbol({
+    requestTimeout,
+    symbol
+  }: {
+    requestTimeout: number;
+    symbol: string;
+  }) {
+    const jsonRes = await this.fetchJson({
+      requestTimeout,
+      url: `${TrackinsightDataEnhancerService.baseUrl}/search-api/search_v2/${encodeURIComponent(symbol)}/_/ticker/default/0/3`
+    });
+
+    if (!jsonRes) {
+      return undefined;
+    }
+
+    if (!Array.isArray(jsonRes.results?.docs)) {
+      this.logger.warn(
+        `Could not search Trackinsight symbol for "${symbol}": Invalid response`
+      );
+
+      return undefined;
+    }
+
+    const ticker = jsonRes.results.docs[0]?.ticker;
+
+    if (
+      typeof ticker === 'string' &&
+      (jsonRes.results.count === 1 ||
+        // Allow exact match
+        ticker === symbol ||
+        // Allow EXCHANGE:SYMBOL
+        ticker.endsWith(`:${symbol}`))
+    ) {
+      return ticker;
+    }
+
+    this.logger.debug(
+      `Could not match a Trackinsight symbol for "${symbol}": ${JSON.stringify(
+        jsonRes
+      )}`
+    );
+
+    return undefined;
+  }
 }
diff --git a/apps/api/src/services/queues/data-gathering/data-gathering.service.spec.ts b/apps/api/src/services/queues/data-gathering/data-gathering.service.spec.ts
index 9b63037ce2..93aa233fba 100644
--- a/apps/api/src/services/queues/data-gathering/data-gathering.service.spec.ts
+++ b/apps/api/src/services/queues/data-gathering/data-gathering.service.spec.ts
@@ -9,31 +9,47 @@ import { DataGatheringService } from './data-gathering.service';
 describe('DataGatheringService', () => {
   let dataGatheringQueue: { addBulk: jest.Mock; clean: jest.Mock };
   let dataGatheringService: DataGatheringService;
-  let dataProviderService: { getHistoricalRaw: jest.Mock };
-  let prismaService: { marketData: { groupBy: jest.Mock; upsert: jest.Mock } };
+  let dataProviderService: {
+    getAssetProfiles: jest.Mock;
+    getHistoricalRaw: jest.Mock;
+  };
+  let prismaService: {
+    marketData: { groupBy: jest.Mock; upsert: jest.Mock };
+    symbolProfile: { upsert: jest.Mock };
+  };
+  let symbolProfileService: { getSymbolProfiles: jest.Mock };
 
   beforeEach(() => {
     dataGatheringQueue = {
       addBulk: jest.fn().mockResolvedValue([]),
       clean: jest.fn().mockResolvedValue([])
     };
-    dataProviderService = { getHistoricalRaw: jest.fn() };
+    dataProviderService = {
+      getAssetProfiles: jest.fn(),
+      getHistoricalRaw: jest.fn()
+    };
     prismaService = {
       marketData: {
         groupBy: jest.fn().mockResolvedValue([]),
         upsert: jest.fn().mockResolvedValue({})
+      },
+      symbolProfile: {
+        upsert: jest.fn().mockResolvedValue({})
       }
     };
+    symbolProfileService = {
+      getSymbolProfiles: jest.fn().mockResolvedValue([])
+    };
 
     dataGatheringService = new DataGatheringService(
-      null,
+      [],
       dataGatheringQueue as any,
       dataProviderService as any,
       null,
       null,
       prismaService as any,
       null,
-      null
+      symbolProfileService as any
     );
   });
 
@@ -41,6 +57,58 @@ describe('DataGatheringService', () => {
     jest.useRealTimers();
   });
 
+  describe('gatherAssetProfiles', () => {
+    const assetProfileIdentifier = { dataSource: 'YAHOO', symbol: 'VWCE.DE' };
+
+    it('keeps the stored lists if the lists of the asset profile are empty', async () => {
+      dataProviderService.getAssetProfiles.mockResolvedValue({
+        'VWCE.DE': {
+          ...assetProfileIdentifier,
+          countries: [],
+          holdings: [],
+          sectors: []
+        }
+      });
+
+      await dataGatheringService.gatherAssetProfiles([
+        assetProfileIdentifier as any
+      ]);
+
+      const { create, update } =
+        prismaService.symbolProfile.upsert.mock.calls[0][0];
+
+      expect(create.holdings).toEqual([]);
+      expect(update.countries).toBeUndefined();
+      expect(update.holdings).toBeUndefined();
+      expect(update.sectors).toBeUndefined();
+    });
+
+    it('updates the stored lists if the lists of the asset profile have items', async () => {
+      const countries = [{ code: 'US', weight: 1 }];
+      const holdings = [{ name: 'NVIDIA Corp.', weight: 0.05 }];
+      const sectors = [{ name: 'Technology', weight: 1 }];
+
+      dataProviderService.getAssetProfiles.mockResolvedValue({
+        'VWCE.DE': {
+          ...assetProfileIdentifier,
+          countries,
+          holdings,
+          sectors
+        }
+      });
+
+      await dataGatheringService.gatherAssetProfiles([
+        assetProfileIdentifier as any
+      ]);
+
+      const { update } = prismaService.symbolProfile.upsert.mock.calls[0][0];
+
+      expect(update).toEqual(
+        expect.objectContaining({ countries, holdings, sectors })
+      );
+    });
+  });
+
   describe('getAssetProfileIdentifiersWithRecentMarketData', () => {
     it('queries real market prices since the start of yesterday (UTC)', async () => {
       jest.useFakeTimers().setSystemTime(new Date('2026-08-24T14:00:00.000Z'));
diff --git a/apps/api/src/services/queues/data-gathering/data-gathering.service.ts b/apps/api/src/services/queues/data-gathering/data-gathering.service.ts
index 83d722888f..fa96b1201c 100644
--- a/apps/api/src/services/queues/data-gathering/data-gathering.service.ts
+++ b/apps/api/src/services/queues/data-gathering/data-gathering.service.ts
@@ -41,6 +41,7 @@ import {
   subMilliseconds,
   subYears
 } from 'date-fns';
+import { isEmpty } from 'lodash-es';
 import ms, { StringValue } from 'ms';
 
 @Injectable()
@@ -177,17 +178,18 @@ export class DataGatheringService {
           update: {
             assetClass,
             assetSubClass,
-            countries,
             currency,
             cusip,
             figi,
             figiComposite,
             figiShareClass,
-            holdings,
             isin,
             name,
-            sectors,
-            url
+            url,
+            // Keep the stored data if no list is available
+            countries: isEmpty(countries) ? undefined : countries,
+            holdings: isEmpty(holdings) ? undefined : holdings,
+            sectors: isEmpty(sectors) ? undefined : sectors
           },
           where: {
             dataSource_symbol: {