Abstract: Elsevier, Taylor & Francis, Springer Nature, Wiley, and SAGE: Many researchers know that the five giant firms publish most of the world’s scholarship. Fifty years of acquisitions and journal launches have yielded a stunningly profitable oligopoly, built up from academics’ unpaid writing-and-editing labor. Their business is a form of IP rentiership—collections of title-by-title prestige monopolies that, in the case of Nature or The Lancet, underwrite a stable of spinoff journals on the logic of the Hollywood franchise. Less well-known is that Elsevier and its peers are layering a second business on top of their legacy publishing operations, fueled by data extraction. They are packaging researcher behavior, gleaned from their digital platforms, into prediction products, which they sell back to universities and other clients. Their raw material is scholars’ citations, abstracts, downloads, and reading habits, repurposed into dashboard services that, for example, track researcher productivity. Elsevier and the other oligopolist firms are fast becoming, in other words, surveillance publishers . And they are using the windfall profits from their existing APC-and-subscription business to finance their moves into predictive analytics.