The Kharkov Institute of Physics and Technology was estimated to have up to 75 kg of HEU with enrichment of 90 percent and may also have about 30-40 kg of scrap material with lower enrichments - 20, 25, and 36 percent (see William C. Potter, Robert Nurick, "The Hard Cases. Eliminating Civilian HEU In Ukraine and Belarus," Nonproliferation Review, July 2008). Smaller amount of material, reportedly about 6 kg of HEU, at the Sevastopol National University appears to be part of the subcritical assembly or the IR-100 reactor located there.
The VVR-M reactor at the Institute for Nuclear Research in Kiev, which used HEU fuel in the past, was converted to LEU in 2008-2009 (with U.S. assistance). It is not clear, however, if the spent HEU fuel was removed from the site.