Kupientyn belonged to Adam Lubicz-Szydłowski, the starost of Mielnik, from 1819 to Teodor and Edward Lubicz-Szydłowski, then from 1863 to Antoni Lubicz-Szydłowski, and then in the last quarter of the 19th century to Antoni Lubicz-Szydłowski's daughter Jadwiga and her husband Adolf Zembrzycki. In 1911, the estate passed into the hands of Jadwiga née Zembrzycka and her husband Czesław Winnicki. The last owners were Anna née Winnicka and Zygmunt Hryniewicz.