Our last specific reference to the Guild of Venturers is a passing mention in the year II 880, but they seem to have persisted at least through the reign of their founder Tar-Aldarion, a reign that lasted until II 1075. Tar-Aldarion's heir Tar-Ancalimë had no interest in ships or sailing, so her accession meant that the Venturers would have lost influence at court, but we're not told that they ceased to exist.

We know that the Guildhouse of the Venturers (that is, the great ship Eämbar) was taken from them by a later King. This implies that the Guild survived at least through Queen Tar-Ancalimë's reign, though the specific King involved is not identified. The confiscation of their Guildhouse seems to suggest that the Guild itself came to an end at the same time, but this is not stated outright. Indeed, it is not said that the Guild came to an end at all, and so conceivably it might even have survived to the time of the Downfall.