ACL Start of Season report shows the following airlines allocated slots:
EasyJet, Wizzair, Ryanair, Blue Air, EAT/DHL. Vueling, TUI, El Al, Sun Express, MNG, Fly One, Skyup, Freebird, LOT (2 only).
The SkyUp operation is a series of flights to Kiev, but they are not showing on SkyUp's website at present.