Most PC manufacturers rely completely on ODM plants to make their PCs. Not so Lenovo. The biggest PC manufacturer by volume has a network of in-house factories all over the world - and since 2021, also in Europe. The 50,000 m² facility in the Hungarian capital Budapest produces ThinkSystem servers and Lenovo ThinkCentre desktop PCs.https://www.notebookcheck.net/Made-in-EU-for-EU-in-the-era-of-trade-wars-Inside-Lenovo-s-only-European-PC-factory.954184.0.html
A small correction: this factory is not located in Budapest, but in a small town near Budapest, in Üllő.