"Series Z" refers to a specific category of funding rounds for startups, typically occurring after earlier rounds like Series A, B, and C. This stage is often aimed at scaling the business further, expanding market reach, or preparing for an initial public offering (IPO). Investors in Series Z rounds may include venture capital firms, private equity, or institutional investors looking for established companies with proven business models. In the context of funding, Series Z can also indicate a later stage in a company's lifecycle, where it has demonstrated significant growth and stability. Companies at this stage often seek larger amounts of capital to enhance their operations, invest in technology, or acquire other businesses. This funding is crucial for maintaining competitive advantage in the market.