Complex sentence: It was granted to Edward Osborne, Richard Staper, Thomas Smith and William Garret with the purpose of regulating English trade with Turkey and the Levant; it remained in continuous existence until superseded in 1825.
Split into simpler sentences: It was granted to Edward Osborne, Richard Staper, Thomas Smith and William Garret with the purpose of regulating English trade with Turkey and the Levant. The Company remained in continuous existence until superseded in 1825.