A Series C investor is an individual or firm that provides funding to a startup during its Series C round, which is typically a later stage of venture capital financing aimed at scaling the business and preparing it for potential acquisition or public offering.
Synonyms: Series C backer, Series C funding provider, Series C financier, Late-stage investor, Growth stage investor

Series C investors contribute capital to startups that have already demonstrated strong growth and market traction. Their investment helps the company expand into new markets, develop new products, or make strategic acquisitions. Unlike earlier rounds, Series C funding is often larger and involves more established investors, including venture capital firms, private equity firms, and sometimes hedge funds.
By the time a startup reaches Series C, it usually has a proven business model and steady revenue streams. Series C investors provide the funds necessary to accelerate growth and scale operations significantly. This round can be critical for startups aiming to compete on a larger scale or prepare for an initial public offering (IPO).
Typical Series C investors include late-stage venture capital firms, private equity investors, and institutional investors. For example, a venture capital firm that specializes in growth-stage companies might lead a Series C round to help a tech startup expand internationally or develop new technology.