He also remained the owner of a number of mines, steel plants, railway companies, 2 shipping companies on the Dnieper, oil companies, e.g. Russian Nafta (Русская нефть) and Ter Akopov (Тер-Акопов), insurance companies, 8 metal and machine factories (2 in Kiev), textile factories , cement plants, 2 luxury hotels in Kiev (eg European Hotel), press publications "Novoye Vremia" (Новое Время, "New Times") and "Birżewyje Viedomosti" (Биржевые ведомости, "Stock Exchange News"), forest areas. To manage the syndicate, Jaroszyński created the Council, which was composed of 5 ministers and 10 senators, incl. former president of the Council of Ministers Vladimir Kokovtsov (1853-1943) and former director of the police department Alexei Lopukhin (1864-1928), while the direct administration of the property under the name "Karol Jaroszyński's property and interests management" was located in the Kiev Grand Hotel (1917–1918). Jaroszyński maintained many facilities for his own and family needs, e.g. palaces - in Antopol, 2 in Saint Petersburg, at ul. B. Morska (ул. Большая Морская 52 / наб. Р. Мойки 97) (1916-) and on Kamienna Island, in Kiev at Wał Jarosława 1 (Ярославов Вал) (1907-), houses in Odessa, London, Beaulieu-sur-Mer, Monte Carlo and Warsaw, 13 tenement houses in Kiev and 8 in St. Petersburg. The main figure and spokesman for the so-called "Banking intrigue" in Russia, the aim of which was to financially support the anti-Bolshevik forces in Russia by the Allies. He stayed in London (1919); in 1920 he evacuated on the last ship from Crimea via Constantinople to Paris, where he resided at the Vendome hotel. Then he lived in Warsaw in the Sobański Palace (1921–1923), where he served