A Series D Financier is an investor who provides funding to a startup during its Series D round of financing. This round typically occurs after the company has already gone through earlier funding stages like Series A, B, and C. Series D funding is often used to help the startup scale further, enter new markets, or prepare for an initial public offering (IPO) or acquisition.
Synonyms: Series D Investor, Series D Funding Provider, Late-Stage Investor, Series D Backer, Series D Capital Provider

A Series D Financier invests capital into a startup that has demonstrated significant growth and is looking to expand even more. Unlike early-stage investors, Series D Financiers usually come in when the company has a proven business model and steady revenue but needs additional funds to accelerate growth or solidify its market position.
Startups seek Series D funding to support large-scale expansion, develop new products, or enter international markets. This round can also help a company improve its financial health before going public or being acquired. Series D rounds tend to involve larger sums of money compared to earlier rounds.
These investors can be venture capital firms, private equity firms, or even late-stage investment funds. For example, a venture capital firm that specializes in late-stage investments might participate in a Series D round to help a startup prepare for an IPO. Sometimes, strategic corporate investors also join as Series D Financiers to gain a stake in a promising company.