In 1886, Guinness became a public company through a major London Stock Exchange flotation. The brewery was already one of the largest in the world and raised substantial capital. The flotation showed how stout, empire, finance, and mass production could be joined in one brand.

Guinness became one of the great symbols of Irish and British drinking culture, later appearing in poems, songs, memoirs, and modernist social settings. Its rise helps contextualize literary treatments of Dublin, empire, labor, and commercial identity, influencing poets like W.B. Yeats who reflected on the cultural significance of such icons.