Kutalmışoglu Suleiman (Old Anatolian Turkish: سُلَیمان بن قُتَلمِش, Persian: سلیمان بن قتلمش) founded an independent Seljuq Turkish state in Anatolia and ruled as Seljuq Sultan of Rûm from 1077 until his death in 1086.
Suleyman was the son of Qutalmish, who had struggled unsuccessfully against his cousin Alp Arslan for the throne of Great Seljuq Empire. When Kutalmish died in 1064, Suleyman fled with his three brothers into the Taurus Mountains and there sought refuge with Turkmen tribes living beyond the borders of the empire. Alp Arslan responded by launching a series of punitive expeditions against them. Of the four brothers, Suleyman alone survived the raids and was able to consolidate his leadership of the Turkmen.
In 1078, the Byzantine emperor Michael VII sought the help of Suleyman against Nicephorus Botaneiates, the commander of the Anatolic Theme, who had challenged the emperor for the throne. Suleyman intercepted Botaneiates' small force between Cotyaeum and Nicaea, whereupon the usurper persuaded Suleyman to join his rebellion by offering him incentives superior to those of the emperor. Nicephorus' bid for power was successful, and in return for their support Suleyman's Turkmen were allowed to settle on the Asiatic side of the Bosphorus, near Constantinople itself. Two years later, Suleyman lent his support to another pretender, Nicephorus Melissenus. It was the latter Nicephorus who opened the gates of Nicaea to the Turkmen, allowing Suleyman to establish a permanent base. All Bithynia was soon under Suleyman's control, a circumstance which allowed him to restrict communication between Constantinople and the former Byzantine subjects in Anatolia.
In 1084, Suleiman left Nicaea, leaving his kinsman Abu'l Qasim in charge.
Suleiman expanded his realm, in 1085 he captured Antioch and proceeded to massacre its inhabitants. Moreover, the treasures of the church of St. Cassianus were stolen and the church was converted into a mosque. He was killed near Antioch in 1086 by Tutush I, the Seljuq ruler of Syria. Suleyman's son, Kilij Arslan I, was captured, and Malik Shah transferred him to Isfahan as a hostage. It is uncertain whether Tutush killed Suleiman out of loyalty to Malik-Shah I or simply for personal gain.
Upon the death of Malik-Shah I, Kilij Arslan I re-established the Sultanate of Rûm.